Home |
Search |
Today's Posts |
![]() |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
|
LinkBack | Thread Tools | Display Modes |
#1
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
So I was wondering, from a post here about a bone stock engine running
nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic |
#2
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() |
#4
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 14:52:02 -0600, "Snag" wrote:
Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g An added bonus is that if you get a misfire it's gonna explode on the next cycle ... I read up a bit once on nitro burning drag cars , them motors are running very close to hydraulic lock . It was also interesting to discover just how few times the motor actually turns over in a quarter mile . At for example 10k RPM's , on a trip down the track that lasts say 5 seconds that's only like a bit over 800 revolutions - and many of those care do it in way less that 5 seconds . Right. The stoichiometric ratio for pure nitro requires one heck of a lot of nitro. But even mixed with gasoline, the products of a misfire are themselves explosive, and your engine can grenade in a spectacular way. Which makes you wonder about Gunner sitting on a nitro-fueled bomb, just one misfire away from suffering high-speed castration... I think the nitro story is a new addition to his account of the event, BTW. g -- Ed Huntress |
#5
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
Ed Huntress wrote:
The stoichiometric ratio for pure nitro requires one heck of a lot of nitro. But even mixed with gasoline, the products of a misfire are themselves explosive, and your engine can grenade in a spectacular way. Which makes you wonder about Gunner sitting on a nitro-fueled bomb, just one misfire away from suffering high-speed castration... I think the nitro story is a new addition to his account of the event, BTW. g Heh , I was following a friend on a little motorcycle ride . His was a stroked 92 ci Harley Shovelhead . As he attacked a sweeping uphill turn at a "high rate of speed" I heard a loud BANG and saw him and the bike basically disappear in a cloud of smoke . After attempting roadside repairs we discovered that the rear cylinder had cracked most of the way around at the base flange . It probably wouldn't have castrated him as there was a frame top tube between him and the jug , but it sure would have been exciting if it had broken all the way . Pretty good chance the flying bits would have done at least some minor maiming of his lower extremities ... -- Snag Learning keeps you young ! |
#6
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() wrote in message ... So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic I think the issue with a motorcycle reaching those speeds is not so much horsepower as stream lining. After all, if there was no resistance of any kind, you could reach 264 mph with a 1 horsepower engine. The only motorcycles that have reached speeds close to that I know about have had fully enclosed shells. It was clear from Gunner's original description that was not the case. I am not sure why there is so much debate about this. Gunner is a text-book classic sociopath. He will say whatever he thinks he can get away with to gain status among his percieved peers. When questioned, he resorts to threats. |
#7
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 13:39:24 -0800, "anorton"
wrote: wrote in message .. . So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic I think the issue with a motorcycle reaching those speeds is not so much horsepower as stream lining. After all, if there was no resistance of any kind, you could reach 264 mph with a 1 horsepower engine. The only motorcycles that have reached speeds close to that I know about have had fully enclosed shells. It was clear from Gunner's original description that was not the case. I am not sure why there is so much debate about this. Gunner is a text-book classic sociopath. He will say whatever he thinks he can get away with to gain status among his percieved peers. When questioned, he resorts to threats. Well, there are stages to it. 1) Make silly Walter Mitty type assertion 2) When caught, pretend it's a joke 3) When no one laughs, gather up the Boyz, who will make wisecracks 4) Laugh at the wisecracks 5) Try changing the subject 6) If that doesn't work, villify whoever is arguing with you 7) If that doesn't work, accuse him of homosexuality 8) And of being a liberal 9) Tell him he's on the cull list and will die soon 10) Start a new conversation on an unrelated topic It's complicated. -- Ed Huntress |
#8
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 13:39:24 -0800, "anorton"
wrote: wrote in message .. . So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic I think the issue with a motorcycle reaching those speeds is not so much horsepower as stream lining. After all, if there was no resistance of any kind, you could reach 264 mph with a 1 horsepower engine. The only motorcycles that have reached speeds close to that I know about have had fully enclosed shells. It was clear from Gunner's original description that was not the case. I am not sure why there is so much debate about this. Gunner is a text-book classic sociopath. He will say whatever he thinks he can get away with to gain status among his percieved peers. When questioned, he resorts to threats. I know about the streamlining. That's why I was thinking about how much HP it would take to actually push a sit on bike and rider at high speed. Eric |
#9
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Feb 26, 1:39*pm, "anorton"
wrote: wrote in message ... So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic I think the issue with a motorcycle reaching those speeds is not so much horsepower as stream lining. *After all, if there was no resistance of any kind, you could reach 264 mph with a 1 horsepower engine. The only motorcycles that have reached speeds close to that I know about have had fully enclosed shells. It was clear from Gunner's original description that was not the case. I am not sure why there is so much debate about this. Gunner is a text-book classic sociopath. He will say whatever he thinks he can get away with to gain status among his percieved peers. When questioned, he resorts to threats. "It was clear from Gunner's original description that was not the case. I am not sure why there is so much debate about this. Gunner is a text-book classic sociopath. He will say whatever he thinks he can get away with to gain status among his percieved peers. When questioned, he resorts to threats. " What I love is when Gunner claims you are now in his kill file when he can't handle being confronted with the truth. An example would be Gunner having no inspection area in his **** hole shop. He posted a picture of his inspection tool cabinet. His inspection tools were covered with dirt and sand from the dirt floor in his shop. What's much more interesting than Gunner's many, many lies is the fact that the more Gunner lies, the more his cult of idiots worship him. |
#10
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress
wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric |
#11
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 14:02:10 -0800, wrote:
On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g -- Ed Huntress |
#12
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Just think what a quart of the full strength stuff would do to the engine of one of those idiot's who roar down your street at 3 in the morning, ratting windows for blocks? ![]() |
#13
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 17:06:56 -0500, Ed Huntress
wrote: On Tue, 26 Feb 2013 14:02:10 -0800, wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g My older brother thought it was funny too. He would tell me if he saw a lawnmower dumped on the side of the road. I'd get it and see if it was worth fixing. Usually they were. Just needed points or something simple. Then I'd have another mower to modify for the tall weeds. No bogging them mowers down. Eric |
#14
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Feb 26, 2:02*pm, wrote:
On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc *Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric http://en.wikipedia.org/wiki/Glow_fuel |
#15
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 14:25:09 -0800, wrote:
On Tue, 26 Feb 2013 17:06:56 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 14:02:10 -0800, wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g My older brother thought it was funny too. He would tell me if he saw a lawnmower dumped on the side of the road. I'd get it and see if it was worth fixing. Usually they were. Just needed points or something simple. Then I'd have another mower to modify for the tall weeds. No bogging them mowers down. Eric Well, I'm with you on that. Until I bought my current Honda from my neighbor, when he moved away, I never spent more than $10 for a lawn mower, at yard sales. Points, plug, maybe a condenser, fresh oil, sharpen the blade...another five to ten years of mowing happiness. -- Ed Huntress |
#16
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Feb 26, 2:06*pm, Ed Huntress wrote:
On Tue, 26 Feb 2013 14:02:10 -0800, wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc *Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g -- Ed Huntress http://en.wikipedia.org/wiki/Glow_fuel "Ingredients Glow fuel is a mixture of methanol, nitromethane, and oil. Methanol is the primary ingredient as it provides the bulk of the fuel, and is needed as a solvent for the other ingredients. The presence of methanol causes the glow plug found in model engines to heat via a catalytic reaction with the platinum metal wire element which glows in the presence of methanol vapor. Nitromethane is added to the methanol to increase power and to make the engine easier to tune. Typically glow fuel is about 0-30% nitromethane. While higher concentrations can result in better engine performance, usage of highly concentrated nitromethane is rare due to its cost. Although a given amount of nitromethane contains less energy than the same amount of methanol, it increases the amount of available oxygen in the combustion chamber per every intake stroke, which allows the engine to draw in more fuel while still maintaining a favorable mixture setting. The increased amount of fuel entering the engine increases power output, and also aids in cooling. For racing use, the nitromethane content can be increased to the range of 30%-65%. Nitromethane is often difficult to obtain in many countries, so in these countries glow fuel typically has no nitromethane at all. Lubrication Most model engines require oil to be included with the fuel as a lubricant since the engine has no independent oiling capability. Model engine fuel is typically 8-22% oil, with the higher percentages run in older design two-stroke glow engines that use bushings for the crankshaft bearings. The most commonly used lubricants are castor oil and synthetic oils, and many glow fuels include a mixture of the two. The oils included in glow fuel generally are not burned by the engine, and are expelled out the exhaust of the engine. This also helps the engine dissipate heat, as the oil emitted is generally hot. Four stroke model engines, since they are generally designed to be simple powerplants while still incorporating the usual camshaft, rocker arms and poppet valves of larger sized four stroke engines, are generally meant to use glow ignition and their fuel. Often, the oil percentage for four stroke glow fuel can be lowered from the 18-20% figure used for some two-stroke engines, down to as low as a 12-15% percentage per unit of blended glow fuel, but use of such low- percentage lubricant fuel can also mandate the need for a small percentage of castor oil in the mix to avoid having too little oil in the mix, and also mandates setting the high-speed fuel mixture carefully by using a handheld digital tachometer to check engine speed to avoid over-leaning of the fuel mixture. Glow engines generally have to be run slightly rich with a higher fuel/ air ratio than is ideal to keep the engine cool as the fuel going out the exhaust also takes heat with it, and so vehicles with glow engines generally get coated with lots of oil. Almost all the oil comes out the exhaust, and some nitromethane and methanol as well (as it's not all burned) requiring some cleaning when one is done using the model. The nitromethane that exists in many glow fuel blends can cause corrosion of metal parts in model engines, especially four-stroke designs, due to the nitric acid residue formed from combustion of nitromethane-content glow fuel, making the use of a so-called "after- run oil" a common practice after a model flying session with a four- stroke glow engine-powered model. Glow fuel is not difficult to make, and so many modelers mix their own to save money, but some of the ingredients are flammable and/or explosive and so can be dangerous, especially in large quantities. Most modelers buy their glow fuel premixed from such manufacturers such as Byron, Blue Thunder, FHS Supply, Model Technics, Morgan, Powermaster, Tornado, Wildcat, and many others. "Typically glow fuel is about 0-30% nitromethane." |
#17
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 14:31:18 -0800 (PST), jon_banquer
wrote: On Feb 26, 2:06*pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:02:10 -0800, wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc *Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g -- Ed Huntress http://en.wikipedia.org/wiki/Glow_fuel "Ingredients Glow fuel is a mixture of methanol, nitromethane, and oil. Methanol is the primary ingredient as it provides the bulk of the fuel, and is needed as a solvent for the other ingredients. The presence of methanol causes the glow plug found in model engines to heat via a catalytic reaction with the platinum metal wire element which glows in the presence of methanol vapor. Nitromethane is added to the methanol to increase power and to make the engine easier to tune. Typically glow fuel is about 0-30% nitromethane. While higher concentrations can result in better engine performance, usage of highly concentrated nitromethane is rare due to its cost. Although a given amount of nitromethane contains less energy than the same amount of methanol, it increases the amount of available oxygen in the combustion chamber per every intake stroke, which allows the engine to draw in more fuel while still maintaining a favorable mixture setting. The increased amount of fuel entering the engine increases power output, and also aids in cooling. For racing use, the nitromethane content can be increased to the range of 30%-65%. Nitromethane is often difficult to obtain in many countries, so in these countries glow fuel typically has no nitromethane at all. Lubrication Most model engines require oil to be included with the fuel as a lubricant since the engine has no independent oiling capability. Model engine fuel is typically 8-22% oil, with the higher percentages run in older design two-stroke glow engines that use bushings for the crankshaft bearings. The most commonly used lubricants are castor oil and synthetic oils, and many glow fuels include a mixture of the two. The oils included in glow fuel generally are not burned by the engine, and are expelled out the exhaust of the engine. This also helps the engine dissipate heat, as the oil emitted is generally hot. Four stroke model engines, since they are generally designed to be simple powerplants while still incorporating the usual camshaft, rocker arms and poppet valves of larger sized four stroke engines, are generally meant to use glow ignition and their fuel. Often, the oil percentage for four stroke glow fuel can be lowered from the 18-20% figure used for some two-stroke engines, down to as low as a 12-15% percentage per unit of blended glow fuel, but use of such low- percentage lubricant fuel can also mandate the need for a small percentage of castor oil in the mix to avoid having too little oil in the mix, and also mandates setting the high-speed fuel mixture carefully by using a handheld digital tachometer to check engine speed to avoid over-leaning of the fuel mixture. Glow engines generally have to be run slightly rich with a higher fuel/ air ratio than is ideal to keep the engine cool as the fuel going out the exhaust also takes heat with it, and so vehicles with glow engines generally get coated with lots of oil. Almost all the oil comes out the exhaust, and some nitromethane and methanol as well (as it's not all burned) requiring some cleaning when one is done using the model. The nitromethane that exists in many glow fuel blends can cause corrosion of metal parts in model engines, especially four-stroke designs, due to the nitric acid residue formed from combustion of nitromethane-content glow fuel, making the use of a so-called "after- run oil" a common practice after a model flying session with a four- stroke glow engine-powered model. Glow fuel is not difficult to make, and so many modelers mix their own to save money, but some of the ingredients are flammable and/or explosive and so can be dangerous, especially in large quantities. Most modelers buy their glow fuel premixed from such manufacturers such as Byron, Blue Thunder, FHS Supply, Model Technics, Morgan, Powermaster, Tornado, Wildcat, and many others. "Typically glow fuel is about 0-30% nitromethane." Yeah, standard old blue-can Cox was 10% nitro. It probably still is. Cheaper stuff has 5% or less. -- Ed Huntress |
#18
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Feb 26, 2:39*pm, Ed Huntress wrote:
On Tue, 26 Feb 2013 14:31:18 -0800 (PST), jon_banquer wrote: On Feb 26, 2:06 pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:02:10 -0800, wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g -- Ed Huntress http://en.wikipedia.org/wiki/Glow_fuel "Ingredients Glow fuel is a mixture of methanol, nitromethane, and oil. Methanol is the primary ingredient as it provides the bulk of the fuel, and is needed as a solvent for the other ingredients. The presence of methanol causes the glow plug found in model engines to heat via a catalytic reaction with the platinum metal wire element which glows in the presence of methanol vapor. Nitromethane is added to the methanol to increase power and to make the engine easier to tune. Typically glow fuel is about 0-30% nitromethane. While higher concentrations can result in better engine performance, usage of highly concentrated nitromethane is rare due to its cost. Although a given amount of nitromethane contains less energy than the same amount of methanol, it increases the amount of available oxygen in the combustion chamber per every intake stroke, which allows the engine to draw in more fuel while still maintaining a favorable mixture setting. The increased amount of fuel entering the engine increases power output, and also aids in cooling. For racing use, the nitromethane content can be increased to the range of 30%-65%. Nitromethane is often difficult to obtain in many countries, so in these countries glow fuel typically has no nitromethane at all. Lubrication Most model engines require oil to be included with the fuel as a lubricant since the engine has no independent oiling capability. Model engine fuel is typically 8-22% oil, with the higher percentages run in older design two-stroke glow engines that use bushings for the crankshaft bearings. The most commonly used lubricants are castor oil and synthetic oils, and many glow fuels include a mixture of the two. The oils included in glow fuel generally are not burned by the engine, and are expelled out the exhaust of the engine. This also helps the engine dissipate heat, as the oil emitted is generally hot. Four stroke model engines, since they are generally designed to be simple powerplants while still incorporating the usual camshaft, rocker arms and poppet valves of larger sized four stroke engines, are generally meant to use glow ignition and their fuel. Often, the oil percentage for four stroke glow fuel can be lowered from the 18-20% figure used for some two-stroke engines, down to as low as a 12-15% percentage per unit of blended glow fuel, but use of such low- percentage lubricant fuel can also mandate the need for a small percentage of castor oil in the mix to avoid having too little oil in the mix, and also mandates setting the high-speed fuel mixture carefully by using a handheld digital tachometer to check engine speed to avoid over-leaning of the fuel mixture. Glow engines generally have to be run slightly rich with a higher fuel/ air ratio than is ideal to keep the engine cool as the fuel going out the exhaust also takes heat with it, and so vehicles with glow engines generally get coated with lots of oil. Almost all the oil comes out the exhaust, and some nitromethane and methanol as well (as it's not all burned) requiring some cleaning when one is done using the model. The nitromethane that exists in many glow fuel blends can cause corrosion of metal parts in model engines, especially four-stroke designs, due to the nitric acid residue formed from combustion of nitromethane-content glow fuel, making the use of a so-called "after- run oil" a common practice after a model flying session with a four- stroke glow engine-powered model. Glow fuel is not difficult to make, and so many modelers mix their own to save money, but some of the ingredients are flammable and/or explosive and so can be dangerous, especially in large quantities. Most modelers buy their glow fuel premixed from such manufacturers such as Byron, Blue Thunder, FHS Supply, Model Technics, Morgan, Powermaster, Tornado, Wildcat, and many others. "Typically glow fuel is about 0-30% nitromethane." Yeah, standard old blue-can Cox was 10% nitro. It probably still is. Cheaper stuff has 5% or less. -- Ed Huntress I have such found memories of my control line airplane from Cox. The glow fuel, the castor oil all over everything, the wonderful noise, it starting backwards and cutting my finger... still have the scar! Had no mentor and had to teach myself everything. My dad wasn't mechanical and had zero interest. It wasn't easy. I experienced lots of frustration. See below. This is what I had as a kid: http://tinyurl.com/bj6g8o7 I had this dragster as well. No where near as fun as the plane: http://tinyurl.com/bzdo3j3 After these I got a Carl Goldberg RC kit plane made of styrofoam. No one told me that spray painting it would be a bad idea. Pretty sure I cried when it melted. I remember the RC I put in it was called a galloping ghost. Someone sold me a used RC control cheap. Don't remember who made the RC stuff. I haven't thought about this **** in many, many years. One more thing: I remember using Elmers glue to glue together a colored tissue paper hot air balloon I got from a novelty company. I can't remember the name of the novelty company. They had a catalog filled with cool **** that I always looked at. The hot air balloon took me a lot of work to put together on our kitchen floor and It was pretty big. You filled it / launched it by putting charcoal in a stove pipe and putting the bottom part of the balloon over it while being very careful. I think around the tenth launch it caught fire as it took off. Huge flames. I remember being both happy and sad at the same time. |
#19
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 15:03:29 -0800 (PST), jon_banquer
wrote: On Feb 26, 2:39*pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:31:18 -0800 (PST), jon_banquer wrote: On Feb 26, 2:06 pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:02:10 -0800, wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g -- Ed Huntress http://en.wikipedia.org/wiki/Glow_fuel "Ingredients Glow fuel is a mixture of methanol, nitromethane, and oil. Methanol is the primary ingredient as it provides the bulk of the fuel, and is needed as a solvent for the other ingredients. The presence of methanol causes the glow plug found in model engines to heat via a catalytic reaction with the platinum metal wire element which glows in the presence of methanol vapor. Nitromethane is added to the methanol to increase power and to make the engine easier to tune. Typically glow fuel is about 0-30% nitromethane. While higher concentrations can result in better engine performance, usage of highly concentrated nitromethane is rare due to its cost. Although a given amount of nitromethane contains less energy than the same amount of methanol, it increases the amount of available oxygen in the combustion chamber per every intake stroke, which allows the engine to draw in more fuel while still maintaining a favorable mixture setting. The increased amount of fuel entering the engine increases power output, and also aids in cooling. For racing use, the nitromethane content can be increased to the range of 30%-65%. Nitromethane is often difficult to obtain in many countries, so in these countries glow fuel typically has no nitromethane at all. Lubrication Most model engines require oil to be included with the fuel as a lubricant since the engine has no independent oiling capability. Model engine fuel is typically 8-22% oil, with the higher percentages run in older design two-stroke glow engines that use bushings for the crankshaft bearings. The most commonly used lubricants are castor oil and synthetic oils, and many glow fuels include a mixture of the two. The oils included in glow fuel generally are not burned by the engine, and are expelled out the exhaust of the engine. This also helps the engine dissipate heat, as the oil emitted is generally hot. Four stroke model engines, since they are generally designed to be simple powerplants while still incorporating the usual camshaft, rocker arms and poppet valves of larger sized four stroke engines, are generally meant to use glow ignition and their fuel. Often, the oil percentage for four stroke glow fuel can be lowered from the 18-20% figure used for some two-stroke engines, down to as low as a 12-15% percentage per unit of blended glow fuel, but use of such low- percentage lubricant fuel can also mandate the need for a small percentage of castor oil in the mix to avoid having too little oil in the mix, and also mandates setting the high-speed fuel mixture carefully by using a handheld digital tachometer to check engine speed to avoid over-leaning of the fuel mixture. Glow engines generally have to be run slightly rich with a higher fuel/ air ratio than is ideal to keep the engine cool as the fuel going out the exhaust also takes heat with it, and so vehicles with glow engines generally get coated with lots of oil. Almost all the oil comes out the exhaust, and some nitromethane and methanol as well (as it's not all burned) requiring some cleaning when one is done using the model. The nitromethane that exists in many glow fuel blends can cause corrosion of metal parts in model engines, especially four-stroke designs, due to the nitric acid residue formed from combustion of nitromethane-content glow fuel, making the use of a so-called "after- run oil" a common practice after a model flying session with a four- stroke glow engine-powered model. Glow fuel is not difficult to make, and so many modelers mix their own to save money, but some of the ingredients are flammable and/or explosive and so can be dangerous, especially in large quantities. Most modelers buy their glow fuel premixed from such manufacturers such as Byron, Blue Thunder, FHS Supply, Model Technics, Morgan, Powermaster, Tornado, Wildcat, and many others. "Typically glow fuel is about 0-30% nitromethane." Yeah, standard old blue-can Cox was 10% nitro. It probably still is. Cheaper stuff has 5% or less. -- Ed Huntress I have such found memories of my control line airplane from Cox. The glow fuel, the castor oil all over everything, the wonderful noise, it starting backwards and cutting my finger... still have the scar! Had no mentor and had to teach myself everything. My dad wasn't mechanical and had zero interest. It wasn't easy. I experienced lots of frustration. See below. This is what I had as a kid: http://tinyurl.com/bj6g8o7 I had this dragster as well. No where near as fun as the plane: http://tinyurl.com/bzdo3j3 After these I got a Carl Goldberg RC kit plane made of styrofoam. No one told me that spray painting it would be a bad idea. Pretty sure I cried when it melted. I remember the RC I put in it was called a galloping ghost. Someone sold me a used RC control cheap. Don't remember who made the RC stuff. I haven't thought about this **** in many, many years. Oh, yeah, I have great memories of flying models, too. We flew control-line combat in our neighborhood. I must have build a dozen planes, because we kept crashing them. One more thing: I remember using Elmers glue to glue together a colored tissue paper hot air balloon I got from a novelty company. I can't remember the name of the novelty company. I had a six-footer from Edmund Scientific. Was that it? Glue sticks were easier. g They had a catalog filled with cool **** that I always looked at. The hot air balloon took me a lot of work to put together on our kitchen floor and It was pretty big. You filled it / launched it by putting charcoal in a stove pipe and putting the bottom part of the balloon over it while being very careful. I think around the tenth launch it caught fire as it took off. Huge flames. I remember being both happy and sad at the same time. They always burn sooner or later. My dad set *his* dad's field on fire with one when he was 10 years old. In those days, they put a crossed pair of fine wires across the bottom, wrapped a piece of rag around the intersection, soaked it in kerosene and lit it. Then they ran when it caught fire. Those things have been around for a very long time. My dad was 10 in 1925. -- Ed Huntress |
#20
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() |
#21
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 13:39:24 -0800, "anorton"
wrote: wrote in message .. . So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic I think the issue with a motorcycle reaching those speeds is not so much horsepower as stream lining. After all, if there was no resistance of any kind, you could reach 264 mph with a 1 horsepower engine. The only motorcycles that have reached speeds close to that I know about have had fully enclosed shells. It was clear from Gunner's original description that was not the case. I am not sure why there is so much debate about this. Gunner is a text-book classic sociopath. He will say whatever he thinks he can get away with to gain status among his percieved peers. When questioned, he resorts to threats. VBG Gunner The methodology of the left has always been: 1. Lie 2. Repeat the lie as many times as possible 3. Have as many people repeat the lie as often as possible 4. Eventually, the uninformed believe the lie 5. The lie will then be made into some form oflaw 6. Then everyone must conform to the lie |
#22
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On 2/26/2013 3:31 PM, Gunner wrote:
On Tue, 26 Feb 2013 13:39:24 -0800, "anorton" wrote: wrote in message ... So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic I think the issue with a motorcycle reaching those speeds is not so much horsepower as stream lining. After all, if there was no resistance of any kind, you could reach 264 mph with a 1 horsepower engine. The only motorcycles that have reached speeds close to that I know about have had fully enclosed shells. It was clear from Gunner's original description that was not the case. I am not sure why there is so much debate about this. Gunner is a text-book classic sociopath. He will say whatever he thinks he can get away with to gain status among his percieved peers. When questioned, he resorts to threats. VBG Confession noted. |
#23
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Feb 26, 3:28*pm, Ed Huntress wrote:
On Tue, 26 Feb 2013 15:03:29 -0800 (PST), jon_banquer wrote: On Feb 26, 2:39 pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:31:18 -0800 (PST), jon_banquer wrote: On Feb 26, 2:06 pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:02:10 -0800, wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro.. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g -- Ed Huntress http://en.wikipedia.org/wiki/Glow_fuel "Ingredients Glow fuel is a mixture of methanol, nitromethane, and oil. Methanol is the primary ingredient as it provides the bulk of the fuel, and is needed as a solvent for the other ingredients. The presence of methanol causes the glow plug found in model engines to heat via a catalytic reaction with the platinum metal wire element which glows in the presence of methanol vapor. Nitromethane is added to the methanol to increase power and to make the engine easier to tune. Typically glow fuel is about 0-30% nitromethane. While higher concentrations can result in better engine performance, usage of highly concentrated nitromethane is rare due to its cost. Although a given amount of nitromethane contains less energy than the same amount of methanol, it increases the amount of available oxygen in the combustion chamber per every intake stroke, which allows the engine to draw in more fuel while still maintaining a favorable mixture setting. The increased amount of fuel entering the engine increases power output, and also aids in cooling. For racing use, the nitromethane content can be increased to the range of 30%-65%. Nitromethane is often difficult to obtain in many countries, so in these countries glow fuel typically has no nitromethane at all. Lubrication Most model engines require oil to be included with the fuel as a lubricant since the engine has no independent oiling capability. Model engine fuel is typically 8-22% oil, with the higher percentages run in older design two-stroke glow engines that use bushings for the crankshaft bearings. The most commonly used lubricants are castor oil and synthetic oils, and many glow fuels include a mixture of the two. The oils included in glow fuel generally are not burned by the engine, and are expelled out the exhaust of the engine. This also helps the engine dissipate heat, as the oil emitted is generally hot. Four stroke model engines, since they are generally designed to be simple powerplants while still incorporating the usual camshaft, rocker arms and poppet valves of larger sized four stroke engines, are generally meant to use glow ignition and their fuel. Often, the oil percentage for four stroke glow fuel can be lowered from the 18-20% figure used for some two-stroke engines, down to as low as a 12-15% percentage per unit of blended glow fuel, but use of such low- percentage lubricant fuel can also mandate the need for a small percentage of castor oil in the mix to avoid having too little oil in the mix, and also mandates setting the high-speed fuel mixture carefully by using a handheld digital tachometer to check engine speed to avoid over-leaning of the fuel mixture. Glow engines generally have to be run slightly rich with a higher fuel/ air ratio than is ideal to keep the engine cool as the fuel going out the exhaust also takes heat with it, and so vehicles with glow engines generally get coated with lots of oil. Almost all the oil comes out the exhaust, and some nitromethane and methanol as well (as it's not all burned) requiring some cleaning when one is done using the model. The nitromethane that exists in many glow fuel blends can cause corrosion of metal parts in model engines, especially four-stroke designs, due to the nitric acid residue formed from combustion of nitromethane-content glow fuel, making the use of a so-called "after- run oil" a common practice after a model flying session with a four- stroke glow engine-powered model. Glow fuel is not difficult to make, and so many modelers mix their own to save money, but some of the ingredients are flammable and/or explosive and so can be dangerous, especially in large quantities. Most modelers buy their glow fuel premixed from such manufacturers such as Byron, Blue Thunder, FHS Supply, Model Technics, Morgan, Powermaster, Tornado, Wildcat, and many others. "Typically glow fuel is about 0-30% nitromethane." Yeah, standard old blue-can Cox was 10% nitro. It probably still is. Cheaper stuff has 5% or less. -- Ed Huntress I have such found memories of my control line airplane from Cox. The glow fuel, the castor oil all over everything, the wonderful noise, it starting backwards and cutting my finger... still have the scar! Had no mentor and had to teach myself everything. My dad wasn't mechanical and had zero interest. It wasn't easy. I experienced lots of frustration. See below. This is what I had as a kid: http://tinyurl.com/bj6g8o7 I had this dragster as well. No where near as fun as the plane: http://tinyurl.com/bzdo3j3 After these I got a Carl Goldberg RC kit plane made of styrofoam. No one told me that spray painting it would be a bad idea. Pretty sure I cried when it melted. I remember the RC I put in it was called a galloping ghost. Someone sold me a used RC control cheap. Don't remember who made the RC stuff. I haven't thought about this **** in many, many years. Oh, yeah, I have great memories of flying models, too. We flew control-line combat in our neighborhood. I must have build a dozen planes, because we kept crashing them. One more thing: I remember using Elmers glue to glue together a colored tissue paper hot air balloon I got from a novelty company. I can't remember the name of the novelty company. I had a six-footer from Edmund Scientific. Was that it? Glue sticks were easier. g They had a catalog filled with cool **** that I always looked at. The hot air balloon took me a lot of work to put together on our kitchen floor and It was pretty big. You filled it / launched it by putting charcoal in a stove pipe and putting the bottom part of the balloon over it while being very careful. I think around the tenth launch it caught fire as it took off. Huge flames. I remember being both happy and sad at the same time. They always burn sooner or later. My dad set *his* dad's field on fire with one when he was 10 years old. In those days, they put a crossed pair of fine wires across the bottom, wrapped a piece of rag around the intersection, soaked it in kerosene and lit it. Then they ran when it caught fire. Those things have been around for a very long time. My dad was 10 in 1925. -- Ed Huntress "I had a six-footer from Edmund Scientific. Was that it?" I found who it was. It was Johnson Smith. I was completely obsessed with their catalog and buying stuff from it: http://imprint.printmag.com/branding...nson-smith-co/ "Glue sticks were easier. g" Now you tell me. :) "Oh, yeah, I have great memories of flying models, too. We flew control-line combat in our neighborhood. I must have build a dozen planes, because we kept crashing them." I crashed mine all the time... no combat needed. Struggled with controlling it. Never did get the hang of it. Maybe one day I'll buy another one and master it. Cheaper than seeing a shrink for all that childhood baggage and frustration of having no one to mentor me. :) "In those days, they put a crossed pair of fine wires across the bottom, wrapped a piece of rag around the intersection, soaked it in kerosene and lit it. Then they ran when it caught fire." The idea was to hold it till the hot air balloon inflated and took off? |
#24
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 16:49:55 -0500, Ed Huntress
wrote: On Tue, 26 Feb 2013 13:39:24 -0800, "anorton" wrote: wrote in message . .. So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic I think the issue with a motorcycle reaching those speeds is not so much horsepower as stream lining. After all, if there was no resistance of any kind, you could reach 264 mph with a 1 horsepower engine. The only motorcycles that have reached speeds close to that I know about have had fully enclosed shells. It was clear from Gunner's original description that was not the case. I am not sure why there is so much debate about this. Gunner is a text-book classic sociopath. He will say whatever he thinks he can get away with to gain status among his percieved peers. When questioned, he resorts to threats. Well, there are stages to it. 1) Make silly Walter Mitty type assertion 2) When caught, pretend it's a joke 3) When no one laughs, gather up the Boyz, who will make wisecracks 4) Laugh at the wisecracks 5) Try changing the subject 6) If that doesn't work, villify whoever is arguing with you 7) If that doesn't work, accuse him of homosexuality 8) And of being a liberal 9) Tell him he's on the cull list and will die soon 10) Start a new conversation on an unrelated topic 11) Demand that everyone laughing disprove his lie. 12) Pretend to killfile anyone who keeps laughing. 13) Tell new lies to validate the original. It's complicated. Arf arf. Complication isn't an impediment when you have a 165 IQ and a Victoria's Secret girlfriend who worships you. |
#25
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() "Ed Huntress" wrote in message ... I had a six-footer from Edmund Scientific. Was that it? Glue sticks were easier. g They had a catalog filled with cool **** Pretty sure the printed version still is available, even... http://www.scientificsonline.com/cat...ult/?q=balloon |
#26
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() "Ed Huntress" wrote in message ... I had a six-footer from Edmund Scientific. http://www.scientificsonline.com/pro...r-balloon.html "Professional Weather Balloon, One 16 Foot Balloon, 100 Cubic Feet (3072151) $79.95 |
#27
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 16:04:06 -0800 (PST), jon_banquer
wrote: On Feb 26, 3:28*pm, Ed Huntress wrote: On Tue, 26 Feb 2013 15:03:29 -0800 (PST), jon_banquer wrote: On Feb 26, 2:39 pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:31:18 -0800 (PST), jon_banquer wrote: On Feb 26, 2:06 pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:02:10 -0800, wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g -- Ed Huntress http://en.wikipedia.org/wiki/Glow_fuel "Ingredients Glow fuel is a mixture of methanol, nitromethane, and oil. Methanol is the primary ingredient as it provides the bulk of the fuel, and is needed as a solvent for the other ingredients. The presence of methanol causes the glow plug found in model engines to heat via a catalytic reaction with the platinum metal wire element which glows in the presence of methanol vapor. Nitromethane is added to the methanol to increase power and to make the engine easier to tune. Typically glow fuel is about 0-30% nitromethane. While higher concentrations can result in better engine performance, usage of highly concentrated nitromethane is rare due to its cost. Although a given amount of nitromethane contains less energy than the same amount of methanol, it increases the amount of available oxygen in the combustion chamber per every intake stroke, which allows the engine to draw in more fuel while still maintaining a favorable mixture setting. The increased amount of fuel entering the engine increases power output, and also aids in cooling. For racing use, the nitromethane content can be increased to the range of 30%-65%. Nitromethane is often difficult to obtain in many countries, so in these countries glow fuel typically has no nitromethane at all. Lubrication Most model engines require oil to be included with the fuel as a lubricant since the engine has no independent oiling capability. Model engine fuel is typically 8-22% oil, with the higher percentages run in older design two-stroke glow engines that use bushings for the crankshaft bearings. The most commonly used lubricants are castor oil and synthetic oils, and many glow fuels include a mixture of the two. The oils included in glow fuel generally are not burned by the engine, and are expelled out the exhaust of the engine. This also helps the engine dissipate heat, as the oil emitted is generally hot. Four stroke model engines, since they are generally designed to be simple powerplants while still incorporating the usual camshaft, rocker arms and poppet valves of larger sized four stroke engines, are generally meant to use glow ignition and their fuel. Often, the oil percentage for four stroke glow fuel can be lowered from the 18-20% figure used for some two-stroke engines, down to as low as a 12-15% percentage per unit of blended glow fuel, but use of such low- percentage lubricant fuel can also mandate the need for a small percentage of castor oil in the mix to avoid having too little oil in the mix, and also mandates setting the high-speed fuel mixture carefully by using a handheld digital tachometer to check engine speed to avoid over-leaning of the fuel mixture. Glow engines generally have to be run slightly rich with a higher fuel/ air ratio than is ideal to keep the engine cool as the fuel going out the exhaust also takes heat with it, and so vehicles with glow engines generally get coated with lots of oil. Almost all the oil comes out the exhaust, and some nitromethane and methanol as well (as it's not all burned) requiring some cleaning when one is done using the model. The nitromethane that exists in many glow fuel blends can cause corrosion of metal parts in model engines, especially four-stroke designs, due to the nitric acid residue formed from combustion of nitromethane-content glow fuel, making the use of a so-called "after- run oil" a common practice after a model flying session with a four- stroke glow engine-powered model. Glow fuel is not difficult to make, and so many modelers mix their own to save money, but some of the ingredients are flammable and/or explosive and so can be dangerous, especially in large quantities. Most modelers buy their glow fuel premixed from such manufacturers such as Byron, Blue Thunder, FHS Supply, Model Technics, Morgan, Powermaster, Tornado, Wildcat, and many others. "Typically glow fuel is about 0-30% nitromethane." Yeah, standard old blue-can Cox was 10% nitro. It probably still is. Cheaper stuff has 5% or less. -- Ed Huntress I have such found memories of my control line airplane from Cox. The glow fuel, the castor oil all over everything, the wonderful noise, it starting backwards and cutting my finger... still have the scar! Had no mentor and had to teach myself everything. My dad wasn't mechanical and had zero interest. It wasn't easy. I experienced lots of frustration. See below. This is what I had as a kid: http://tinyurl.com/bj6g8o7 I had this dragster as well. No where near as fun as the plane: http://tinyurl.com/bzdo3j3 After these I got a Carl Goldberg RC kit plane made of styrofoam. No one told me that spray painting it would be a bad idea. Pretty sure I cried when it melted. I remember the RC I put in it was called a galloping ghost. Someone sold me a used RC control cheap. Don't remember who made the RC stuff. I haven't thought about this **** in many, many years. Oh, yeah, I have great memories of flying models, too. We flew control-line combat in our neighborhood. I must have build a dozen planes, because we kept crashing them. One more thing: I remember using Elmers glue to glue together a colored tissue paper hot air balloon I got from a novelty company. I can't remember the name of the novelty company. I had a six-footer from Edmund Scientific. Was that it? Glue sticks were easier. g They had a catalog filled with cool **** that I always looked at. The hot air balloon took me a lot of work to put together on our kitchen floor and It was pretty big. You filled it / launched it by putting charcoal in a stove pipe and putting the bottom part of the balloon over it while being very careful. I think around the tenth launch it caught fire as it took off. Huge flames. I remember being both happy and sad at the same time. They always burn sooner or later. My dad set *his* dad's field on fire with one when he was 10 years old. In those days, they put a crossed pair of fine wires across the bottom, wrapped a piece of rag around the intersection, soaked it in kerosene and lit it. Then they ran when it caught fire. Those things have been around for a very long time. My dad was 10 in 1925. -- Ed Huntress "I had a six-footer from Edmund Scientific. Was that it?" I found who it was. It was Johnson Smith. I was completely obsessed with their catalog and buying stuff from it: http://imprint.printmag.com/branding...nson-smith-co/ Oh, that's cool. I don't remember ever seeing that one. "Glue sticks were easier. g" Now you tell me. :) "Oh, yeah, I have great memories of flying models, too. We flew control-line combat in our neighborhood. I must have build a dozen planes, because we kept crashing them." I crashed mine all the time... no combat needed. Struggled with controlling it. Never did get the hang of it. Maybe one day I'll buy another one and master it. Cheaper than seeing a shrink for all that childhood baggage and frustration of having no one to mentor me. :) Get one of the cheap foam trainers. Start with slow movements and don't overcorrect. Overcorrecting is what gets you into trouble. Combat planes were wild things. They also were easy to build, thankfully. They had no fuselage; all wing and elevator. "In those days, they put a crossed pair of fine wires across the bottom, wrapped a piece of rag around the intersection, soaked it in kerosene and lit it. Then they ran when it caught fire." The idea was to hold it till the hot air balloon inflated and took off? I never did it that way myself, but I think that was it. I know they glued a string to the top and held it up with a long stick until it was ready to fly. My grandmother owned a florist's shop, so my dad had an endless supply of tissue paper. I guess he made green balloons. g -- Ed Huntress |
#28
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Feb 26, 6:09*pm, Ed Huntress wrote:
However, speed is an exponential-ratio thing, and the record set with one of the recent models was 231 mph. If a bike will go 200 mph with 190 hp, it will take 298 hp to go 231, and 450 hp to go 265. -- Ed Huntress Can you explain the math? Dan |
#29
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Feb 26, 5:01*pm, Ed Huntress wrote:
On Tue, 26 Feb 2013 16:04:06 -0800 (PST), jon_banquer wrote: On Feb 26, 3:28*pm, Ed Huntress wrote: On Tue, 26 Feb 2013 15:03:29 -0800 (PST), jon_banquer wrote: On Feb 26, 2:39 pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:31:18 -0800 (PST), jon_banquer wrote: On Feb 26, 2:06 pm, Ed Huntress wrote: On Tue, 26 Feb 2013 14:02:10 -0800, wrote: On Tue, 26 Feb 2013 15:26:19 -0500, Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record.. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g In the early 80s I found a radio control airplane store that sold nitromethane for the engines in these model planes. It came in quart bottles at different concentrations. So I used to buy the stuff and run it in lawnmower engines. I would mill the heads until they would just clear the valves to increase the compression some too. I was amazed at how much better the lawnmowers would cut tall, thick grass. Engine life was poor though. I never did try to run straight nitro. It smelled good too. Eric Jeez, Eric, that's the only nitro-fueled lawnmower I've ever heard of. Did you have to run behind it to keep up? Regarding the model planes, yes, and I had to soup glow plug fuel with an extra 10% nitro to start my model OS Wankel. That would mean about 20% nitro in total. But a lawnmower? Jeez. Yeah, I'll *bet* engine life was poor. g -- Ed Huntress http://en.wikipedia.org/wiki/Glow_fuel "Ingredients Glow fuel is a mixture of methanol, nitromethane, and oil. Methanol is the primary ingredient as it provides the bulk of the fuel, and is needed as a solvent for the other ingredients. The presence of methanol causes the glow plug found in model engines to heat via a catalytic reaction with the platinum metal wire element which glows in the presence of methanol vapor. Nitromethane is added to the methanol to increase power and to make the engine easier to tune. Typically glow fuel is about 0-30% nitromethane. While higher concentrations can result in better engine performance, usage of highly concentrated nitromethane is rare due to its cost. Although a given amount of nitromethane contains less energy than the same amount of methanol, it increases the amount of available oxygen in the combustion chamber per every intake stroke, which allows the engine to draw in more fuel while still maintaining a favorable mixture setting. The increased amount of fuel entering the engine increases power output, and also aids in cooling. For racing use, the nitromethane content can be increased to the range of 30%-65%. Nitromethane is often difficult to obtain in many countries, so in these countries glow fuel typically has no nitromethane at all. Lubrication Most model engines require oil to be included with the fuel as a lubricant since the engine has no independent oiling capability. Model engine fuel is typically 8-22% oil, with the higher percentages run in older design two-stroke glow engines that use bushings for the crankshaft bearings. The most commonly used lubricants are castor oil and synthetic oils, and many glow fuels include a mixture of the two. The oils included in glow fuel generally are not burned by the engine, and are expelled out the exhaust of the engine. This also helps the engine dissipate heat, as the oil emitted is generally hot. Four stroke model engines, since they are generally designed to be simple powerplants while still incorporating the usual camshaft, rocker arms and poppet valves of larger sized four stroke engines, are generally meant to use glow ignition and their fuel. Often, the oil percentage for four stroke glow fuel can be lowered from the 18-20% figure used for some two-stroke engines, down to as low as a 12-15% percentage per unit of blended glow fuel, but use of such low- percentage lubricant fuel can also mandate the need for a small percentage of castor oil in the mix to avoid having too little oil in the mix, and also mandates setting the high-speed fuel mixture carefully by using a handheld digital tachometer to check engine speed to avoid over-leaning of the fuel mixture. Glow engines generally have to be run slightly rich with a higher fuel/ air ratio than is ideal to keep the engine cool as the fuel going out the exhaust also takes heat with it, and so vehicles with glow engines generally get coated with lots of oil. Almost all the oil comes out the exhaust, and some nitromethane and methanol as well (as it's not all burned) requiring some cleaning when one is done using the model. The nitromethane that exists in many glow fuel blends can cause corrosion of metal parts in model engines, especially four-stroke designs, due to the nitric acid residue formed from combustion of nitromethane-content glow fuel, making the use of a so-called "after- run oil" a common practice after a model flying session with a four- stroke glow engine-powered model. Glow fuel is not difficult to make, and so many modelers mix their own to save money, but some of the ingredients are flammable and/or explosive and so can be dangerous, especially in large quantities. Most modelers buy their glow fuel premixed from such manufacturers such as Byron, Blue Thunder, FHS Supply, Model Technics, Morgan, Powermaster, Tornado, Wildcat, and many others. "Typically glow fuel is about 0-30% nitromethane." Yeah, standard old blue-can Cox was 10% nitro. It probably still is.. Cheaper stuff has 5% or less. -- Ed Huntress I have such found memories of my control line airplane from Cox. The glow fuel, the castor oil all over everything, the wonderful noise, it starting backwards and cutting my finger... still have the scar! Had no mentor and had to teach myself everything. My dad wasn't mechanical and had zero interest. It wasn't easy. I experienced lots of frustration. See below. This is what I had as a kid: http://tinyurl.com/bj6g8o7 I had this dragster as well. No where near as fun as the plane: http://tinyurl.com/bzdo3j3 After these I got a Carl Goldberg RC kit plane made of styrofoam. No one told me that spray painting it would be a bad idea. Pretty sure I cried when it melted. I remember the RC I put in it was called a galloping ghost. Someone sold me a used RC control cheap. Don't remember who made the RC stuff. I haven't thought about this **** in many, many years. Oh, yeah, I have great memories of flying models, too. We flew control-line combat in our neighborhood. I must have build a dozen planes, because we kept crashing them. One more thing: I remember using Elmers glue to glue together a colored tissue paper hot air balloon I got from a novelty company. I can't remember the name of the novelty company. I had a six-footer from Edmund Scientific. Was that it? Glue sticks were easier. g They had a catalog filled with cool **** that I always looked at. The hot air balloon took me a lot of work to put together on our kitchen floor and It was pretty big. You filled it / launched it by putting charcoal in a stove pipe and putting the bottom part of the balloon over it while being very careful. I think around the tenth launch it caught fire as it took off. Huge flames. I remember being both happy and sad at the same time. They always burn sooner or later. My dad set *his* dad's field on fire with one when he was 10 years old. In those days, they put a crossed pair of fine wires across the bottom, wrapped a piece of rag around the intersection, soaked it in kerosene and lit it. Then they ran when it caught fire. Those things have been around for a very long time. My dad was 10 in 1925. -- Ed Huntress "I had a six-footer from Edmund Scientific. Was that it?" I found who it was. It was Johnson Smith. I was completely obsessed with their catalog and buying stuff from it: http://imprint.printmag.com/branding...ses-and-9000-o... Oh, that's cool. I don't remember ever seeing that one. "Glue sticks were easier. g" Now you tell me. :) "Oh, yeah, I have great memories of flying models, too. We flew control-line combat in our neighborhood. I must have build a dozen planes, because we kept crashing them." I crashed mine all the time... no combat needed. Struggled with controlling it. Never did get the hang of it. *Maybe one day I'll buy another one and master it. Cheaper than seeing a shrink for all that childhood baggage and frustration of having no one to mentor me. :) Get one of the cheap foam trainers. Start with slow movements and don't overcorrect. Overcorrecting is what gets you into trouble. Combat planes were wild things. They also were easy to build, thankfully. They had no fuselage; all wing and elevator. "In those days, they put a crossed pair of fine wires across the bottom, wrapped a piece of rag around the intersection, soaked it in kerosene and lit it. Then they ran when it caught fire." The idea was to hold it till the hot air balloon inflated and took off? I never did it that way myself, but I think that was it. I know they glued a string to the top and held it up with a long stick until it was ready to fly. My grandmother owned a florist's shop, so my dad had an endless supply of tissue paper. I guess he made green balloons. g -- Ed Huntress "Get one of the cheap foam trainers. Start with slow movements and don't overcorrect. Overcorrecting is what gets you into trouble." I'll look into that. Thanks. "I know they glued a string to the top and held it up with a long stick until it was ready to fly." Good idea. I hadn't learned to think well enough mechanically back then. Mechanical wasn't emphasized / covered in the prep schools I was forced to go to. |
#30
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() |
#31
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() |
#32
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 16:27:41 -0800, "PrecisionmachinisT"
wrote: "Ed Huntress" wrote in message ... I had a six-footer from Edmund Scientific. Was that it? Glue sticks were easier. g They had a catalog filled with cool **** Pretty sure the printed version still is available, even... http://www.scientificsonline.com/cat...ult/?q=balloon Jeez, all those toys.... No hot-air tissue balloons like the ones they used to sell, though. And the prices are pretty steep. -- Ed Huntress |
#33
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 14:52:02 -0600, "Snag" wrote:
Ed Huntress wrote: On Tue, 26 Feb 2013 11:52:10 -0800, wrote: So I was wondering, from a post here about a bone stock engine running nitro methane instead of gasoline, how much extra horsepower could a stock engine produce just by changing fuels from gas to nitro? I'm thinking that the engine won't run very well. Now, I'm sure that if the compression was changed, and the carb re-jetted, and the cam changed, things might work better. But if all you do is change fuels I think there won't be much of an increase. This is of course in response to gunner's assertion that he was clocked going 264 mph on a bone stock Ninja motorcycle burning nitro methane fuel. I don't think the motorcycle could develop enough power to push itself and someone sitting on it to over 200 mph no matter what kind of fuel it was burning. ERic At the time Gunner initially made this (absurd) claim, an all-out lakes-modified Ninja did 231 at Bonneville. That was considered to be the world record for Ninjas, although it wasn't a class record. Some other make was slightly faster. The 1000 cc Honda that topped 270 was claimed to have 400 hp. That doesn't sound unreasonable: the engine was built by Honda specifically for this attempt. That must be very recent, because Gunner held the world record for sit-on motorcycles until very recently. g! That is, if Gunner had actually gone 264 when he said he did, that would have been a world record at the time. The record for "sit-on" motorcycles was broken by Al Lamb in 2012. It was 265 mph, and the bike was another Honda. As for running a stock engine with nitromethane; only if you want to turn your engine into shrapnel. It is very weird stuff, behaving differently with different percentage combinations of gasoline or methanol. You may get lucky with small amounts, or, if the gasoline sucks up the oxygen in the mix, you may blow your muffler into the next county when the resulting hydrogen explodes in your exhaust pipe. If you use much, you will blow up any of several parts of your engine. It's strictly for people who know what they're doing. It also costs too much to be practical. And if your engine is newer than, say, 1980, forget it unless you're an electronics expert, too. If you want a chemical jolt for more horsepower, go for nitrous oxide ("the bottle"). You'll find kits for it all over the Web. We used to have an expert on it here (Bottle Bob) but I think he left. With nitrous, your engine may actually hold together long enough for you to get home. g An added bonus is that if you get a misfire it's gonna explode on the next cycle ... I read up a bit once on nitro burning drag cars , them motors are running very close to hydraulic lock . It was also interesting to discover just how few times the motor actually turns over in a quarter mile . At for example 10k RPM's , on a trip down the track that lasts say 5 seconds that's only like a bit over 800 revolutions - and many of those care do it in way less that 5 seconds . You have to remember those "top fuel" cars are virtually all supercharged - and they do pump enough fuel into them to fill the combustion chamber up to90+% in volume. - with 60 PSI (over 4 atmospheres) of boost - SO - 4X as much air as a NA engine running at 100% VE, and 2.3 times as much power per unit of fuel = at leat 12 times as much power as a non modified engine. Then add additional compression to the "mix". They burn about 75 gallons per minite. They use 85% Nitro - the rest is alcohol - generally Methanol. If a top fuel engine puts out 7500 HP, it is producing 8400 HP - the other 900HP drives the supercharger!!!! |
#34
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
Ed Huntress wrote:
Get one of the cheap foam trainers. Start with slow movements and don't overcorrect. Overcorrecting is what gets you into trouble. Combat planes were wild things. They also were easy to build, thankfully. They had no fuselage; all wing and elevator. That yellow battery powered one that HF sells actually flies pretty good, but you will want a supply of wings..... I never did it that way myself, but I think that was it. I know they glued a string to the top and held it up with a long stick until it was ready to fly. My grandmother owned a florist's shop, so my dad had an endless supply of tissue paper. I guess he made green balloons. g -- Steve W. |
#35
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 17:05:16 -0800 (PST), "
wrote: On Feb 26, 6:09*pm, Ed Huntress wrote: However, speed is an exponential-ratio thing, and the record set with one of the recent models was 231 mph. If a bike will go 200 mph with 190 hp, it will take 298 hp to go 231, and 450 hp to go 265. -- Ed Huntress Can you explain the math? No. I used a speed shop's calculator and I'm not telling. g Oh, all right....The horsepower required to maintain a specific speed: P = 1/2 * Cd * A * k * v^3 P = horsepower required for the velocity in question Cd = coefficient of drag A = frontal area k = constant to account for the density of air (or you can use the actual number - 1.2g/m^3, if you watch your units throughout) v = velocity In addition, you have to work in the rolling resistance. For a motorcycle with high-speed, hard tires, you can ignore it for these purposes. I'll give you a shortcut for the formula in a minute. I'll give you the site of a calculator but first, note the v^3. That's the key to the whole thing, which leads people to overestimate how fast they can go on, say, a Kawasaki Ninja with two or three hundred horsepower. g Here's the calculator. http://www.apexgarage.com/tech/horsepower_calc.shtml Knowing that the unregulated speed of a Ninja is 200 mph and it achieves that with 190 hp, you can plug in any trial numbers you want to get everything to work (I used Cd = 0.5; A = 7; weight 500 lb.) As long as the relationship of these numbers isn't ridiculous, all you need to know is what trial numbers give you 200 mph with 190 hp. Then use those same trial values and try changing the speed. That will give you the horsepower. I tested the online calculator by using a shortcut of the real formula on my own pocket calculator: Original speed cubed over original horsepower = final speed cubed over "x", where "x" is horsepower required. Actually, I tested it by using the variable for speed, and assumed 450 horsepower, to test the online calculator. It works either way. By knowing the original speed and horsepower, you can do away with drag coefficient, frontal area, and air density. It's the relationship between power and speed that you need, plus the "cube" factor for velocity. The shortcut, or the online calculator, will give that to you. Have fun. -- Ed Huntress Dan |
#36
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() |
#37
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
Ed Huntress wrote:
On Tue, 26 Feb 2013 16:27:41 -0800, "PrecisionmachinisT" wrote: "Ed Huntress" wrote in message ... I had a six-footer from Edmund Scientific. Was that it? Glue sticks were easier. g They had a catalog filled with cool **** Pretty sure the printed version still is available, even... http://www.scientificsonline.com/cat...ult/?q=balloon Jeez, all those toys.... No hot-air tissue balloons like the ones they used to sell, though. And the prices are pretty steep. When I was a teen I made 'em out of those plastic bags the dry cleaners send your suits home in ... but I always had a problem with getting enough heat . I was using candles , and that just wasn't enough . -- Snag Learning keeps you young ! |
#38
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 16:34:01 -0800, "PrecisionmachinisT"
wrote: "Ed Huntress" wrote in message ... I had a six-footer from Edmund Scientific. http://www.scientificsonline.com/pro...r-balloon.html "Professional Weather Balloon, One 16 Foot Balloon, 100 Cubic Feet (3072151) $79.95 Ok, but we were talking about tissue-paper hot-air balloons. I have a funny story about those weather balloons, and my 8th-grade buddy's hydrogen-generating apparatus, with zinc chips and some kind of acid, but I'll spare you. g -- Ed Huntress |
#39
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]() "Snag" wrote in message ... Ed Huntress wrote: On Tue, 26 Feb 2013 16:27:41 -0800, "PrecisionmachinisT" wrote: "Ed Huntress" wrote in message ... I had a six-footer from Edmund Scientific. Was that it? Glue sticks were easier. g They had a catalog filled with cool **** Pretty sure the printed version still is available, even... http://www.scientificsonline.com/cat...ult/?q=balloon Jeez, all those toys.... No hot-air tissue balloons like the ones they used to sell, though. And the prices are pretty steep. When I was a teen I made 'em out of those plastic bags the dry cleaners send your suits home in ... but I always had a problem with getting enough heat . I was using candles , and that just wasn't enough . HAHAHA !!! WE filled them with hydrogen, THEN attached the candles....letting them to drift at various locations over Puget Sound... Oftentimes, numerous UFO sightings were reported on the nightly news... |
#40
![]()
Posted to rec.crafts.metalworking
|
|||
|
|||
![]()
On Tue, 26 Feb 2013 20:57:08 -0600, "Snag" wrote:
Ed Huntress wrote: On Tue, 26 Feb 2013 16:27:41 -0800, "PrecisionmachinisT" wrote: "Ed Huntress" wrote in message ... I had a six-footer from Edmund Scientific. Was that it? Glue sticks were easier. g They had a catalog filled with cool **** Pretty sure the printed version still is available, even... http://www.scientificsonline.com/cat...ult/?q=balloon Jeez, all those toys.... No hot-air tissue balloons like the ones they used to sell, though. And the prices are pretty steep. When I was a teen I made 'em out of those plastic bags the dry cleaners send your suits home in ... but I always had a problem with getting enough heat . I was using candles , and that just wasn't enough . Start with a hair dryer or heat gun, until the bag is inflated. Then apply your flame. That's how I did it. -- Ed Huntress |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Extra! Extra! Read all about it! TI to buy Nat'l Semi for $6.5 billion | Electronics Repair | |||
Nitro (lacquer) over MinWax Polyshades? | Woodworking | |||
Here are schematic Junker gas-burning heating installation. [1/1] - "Junker gas burning schematic.zip" yEnc (1/4) | Electronic Schematics | |||
Nitro shells in damascus barrel shotgun | Metalworking | |||
Question about nitro cellulose lacquer | Woodworking |