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
|
|||
|
|||
Airgun plans?
Anyone got a source for plans for making your own air rifle? Id like
to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#2
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Gunner,
Why not try something exotic such as an electrically fired gun? The propellant is a couple of drops of plain, old, water, through wich a heavy electric current is discharged from a capacitor. What do you think? Knowing the internet someone, somewhere, has probably tried this already. For air rifles good literature is available in England. Why not try the British model discussion group? Wolfgang |
#3
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Sun, 23 Apr 2006 07:39:50 GMT, Gunner
wrote: Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. I'm contemplating a *low energy* golfball cannon suitable for decimating squirrel nests in a residential neighborhood. No plans yet. There's a clear field of fire for a good 300 feet to the south, with a 20' freeway sound wall behind it. I'm thinking max altitude of maybe 200 feet, which is about 10 joules of muzzle energy with a golfball. DIL Sherri would probably use an AA12 FA shotgun if she had access to one -- she's that mad at the treerats. SIL is a more temperate voice..... |
#4
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
http://www.bryanandac.com/new_page_10.htm
http://www.hegmans.de/theo/neu_1.htm There's a couple sites for inspiration, if not any actual plans. have been interested in airguns for a very long time, and plans seem to be almost nonexistant. There are a couple forums out there that have a lot of knowlegable scratch builders. The one on Delphi under the name of BullDurham is probably the best that I know of. Do a google for fun supply forum or try yellowforum.com and pull down the menu at the top of the page. The only set of actual plans that I am aware of is a book published in Britain with the title Building a Modern Airgun or something simlar to that, that covers the complete build of a pre charged pneumatic (PCP) airgun. I did a ggogle search and was unable to find it right off, but IIRC it was mentioned in the gunsmithing forum on the chaski forums a while back. There are a couple other books out there that detail the building of Girandoni replicas, and air canes, but they are more along the lines of historical replicas than a modern airgun. Cheers Trevor Jones |
#5
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Trevor Jones wrote:
http://www.bryanandac.com/new_page_10.htm http://www.hegmans.de/theo/neu_1.htm There's a couple sites for inspiration, if not any actual plans. have been interested in airguns for a very long time, and plans seem to be almost nonexistant. There are a couple forums out there that have a lot of knowlegable scratch builders. The one on Delphi under the name of BullDurham is probably the best that I know of. Do a google for fun supply forum or try yellowforum.com and pull down the menu at the top of the page. The only set of actual plans that I am aware of is a book published in Britain with the title Building a Modern Airgun or something simlar to that, that covers the complete build of a pre charged pneumatic (PCP) airgun. I did a ggogle search and was unable to find it right off, but IIRC it was mentioned in the gunsmithing forum on the chaski forums a while back. There are a couple other books out there that detail the building of Girandoni replicas, and air canes, but they are more along the lines of historical replicas than a modern airgun. Cheers Trevor Jones Awright. Not the Chaski forums, but practicalmachinist.com, where I found.... quote If you are interested in building a pneumatic airgun, the book you want to get is "The Modern Pneumatic Airgun" by H.M. Buckley. It is self-published in the UK and very hard to come by in the states. I ordered my copy from , which takes credit card orders from the USA. I haven't started on the project, but the book is almost 200 pages of high quality, detailed instructions and drawings. unquote Cheers Trevor Jones |
#6
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
I think you'll like this guy's site:
http://www.sentex.net/~mwandel/cannon/cannon.html Click on the link which says "Building my own air gun". Chris |
#7
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
|
#8
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Sun, 23 Apr 2006 11:47:52 -0600, Trevor Jones
wrote: Trevor Jones wrote: http://www.bryanandac.com/new_page_10.htm http://www.hegmans.de/theo/neu_1.htm There's a couple sites for inspiration, if not any actual plans. have been interested in airguns for a very long time, and plans seem to be almost nonexistant. There are a couple forums out there that have a lot of knowlegable scratch builders. The one on Delphi under the name of BullDurham is probably the best that I know of. Do a google for fun supply forum or try yellowforum.com and pull down the menu at the top of the page. The only set of actual plans that I am aware of is a book published in Britain with the title Building a Modern Airgun or something simlar to that, that covers the complete build of a pre charged pneumatic (PCP) airgun. I did a ggogle search and was unable to find it right off, but IIRC it was mentioned in the gunsmithing forum on the chaski forums a while back. There are a couple other books out there that detail the building of Girandoni replicas, and air canes, but they are more along the lines of historical replicas than a modern airgun. Cheers Trevor Jones Awright. Not the Chaski forums, but practicalmachinist.com, where I found.... quote If you are interested in building a pneumatic airgun, the book you want to get is "The Modern Pneumatic Airgun" by H.M. Buckley. It is self-published in the UK and very hard to come by in the states. I ordered my copy from , which takes credit card orders from the USA. I haven't started on the project, but the book is almost 200 pages of high quality, detailed instructions and drawings. unquote Cheers Trevor Jones Thanks for the tip on the book! Credit card? Whats that? Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#9
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Sun, 23 Apr 2006 11:31:31 -0500, Don Foreman
wrote: On Sun, 23 Apr 2006 07:39:50 GMT, Gunner wrote: Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. I'm contemplating a *low energy* golfball cannon suitable for decimating squirrel nests in a residential neighborhood. No plans yet. There's a clear field of fire for a good 300 feet to the south, with a 20' freeway sound wall behind it. I'm thinking max altitude of maybe 200 feet, which is about 10 joules of muzzle energy with a golfball. DIL Sherri would probably use an AA12 FA shotgun if she had access to one -- she's that mad at the treerats. SIL is a more temperate voice..... I use small ice cubes in a sling shot to discourage the sh*tty cats around here - no direct hits yet but tin sheds make a fair noise when struck by a piece of hard water, sufficient that as soon as I appear, there is a mad scramble under the hedge. Gerry :-)} London, Canada |
#10
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Christopher Tidy writes:
http://www.sentex.net/~mwandel/cannon/cannon.html Pressure vessels out of ABS pipe? Foolish. |
#11
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Sun, 23 Apr 2006 21:33:24 GMT, Gunner
wrote: On 23 Apr 2006 09:08:19 -0700, wrote: Gunner, Why not try something exotic such as an electrically fired gun? The propellant is a couple of drops of plain, old, water, through wich a heavy electric current is discharged from a capacitor. What do you think? Sounds interesting..and complicated. Im not much of an electronics tech to be frank. Board changer is more my skill level. Getting down to component level and I start to flounder. And I suspect that the power supply and caps bank needed to do instant electrolysis might be a bit heavy. I suspect that this isn't electrolysis but simply instant high-pressure hot steam produced by heat from a spark/arc. It's an interesting idea. A fairly powerful production air rifle has energy of about 30 joules (22 ft lb), as a .177 with 1100 fps muzzle velocity. This would not require a large capacitor. One available 48 joule 450-volt photoflash cap is 1-3/4" dia x 2-1/2" long. It could be charged in a few seconds with 4 AA cells and suitable circuitry. Four alkaline AA cells contain a total of about 29,000 joules, i.e. many shots! However, for perspective, a .22 rimfire short is about 157 joules. I don't know what energy the Lewis & Clark or Austrian infantry rifles had. However, musing on.... The original .45 ACP round in a long barrel (SMG) is about 520 joules. http://www.sightm1911.com/Care/45acp.htm . Taking it to that level, there is a 2000 volt 500uF 1000 joule capacitor that is 2" dia x 4-1/8" long, and you'd get at least 25 shots out of 4 AA cells (for 2 bux) even with fairly lousy efficiency in the circuitry. That's twice the energy of the .45 ACP but still only half the energy of a .30-30 or 7.62mm Kurz (short). Still, not bad for an "air" rifle with no flash and no supersonic "crack". Subsonic bang is more difficult to auditorily localize because it contains less high frequency content. Phase resolution is therefore less with the fixed distance beween ears. What about pressure build time and attainable muzzle velocity? I can attest that a 50 joule photoflash cap will vaporize the end of a screwdriver with a report that sounds a lot more like the crack of a rifle than the bang of a pistol, which infers that it can dump its load rather quickly producing a hypersonic shockwave. Vaporizing water with a shot of energy would produce much more volume of expanding high-pressure gas to accelerate a projectile continuously thru the length of a barrel. However, an "air" rifle can not attain sonic velocity unless the "air" is quite hot, so higher energy infers large-caliber low-velocity bullets, most effective at ranges under 100 meters and probably best at less than 50 meters. It's an interesting idea. There'd be a few details to work out..... |
#12
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Mon, 24 Apr 2006 01:47:41 -0500, Don Foreman
wrote: On Sun, 23 Apr 2006 21:33:24 GMT, Gunner wrote: On 23 Apr 2006 09:08:19 -0700, wrote: Gunner, Why not try something exotic such as an electrically fired gun? The propellant is a couple of drops of plain, old, water, through wich a heavy electric current is discharged from a capacitor. What do you think? Sounds interesting..and complicated. Im not much of an electronics tech to be frank. Board changer is more my skill level. Getting down to component level and I start to flounder. And I suspect that the power supply and caps bank needed to do instant electrolysis might be a bit heavy. I suspect that this isn't electrolysis but simply instant high-pressure hot steam produced by heat from a spark/arc. It's an interesting idea. A fairly powerful production air rifle has energy of about 30 joules (22 ft lb), as a .177 with 1100 fps muzzle velocity. This would not require a large capacitor. One available 48 joule 450-volt photoflash cap is 1-3/4" dia x 2-1/2" long. It could be charged in a few seconds with 4 AA cells and suitable circuitry. Four alkaline AA cells contain a total of about 29,000 joules, i.e. many shots! However, for perspective, a .22 rimfire short is about 157 joules. I don't know what energy the Lewis & Clark or Austrian infantry rifles had. However, musing on.... The original .45 ACP round in a long barrel (SMG) is about 520 joules. http://www.sightm1911.com/Care/45acp.htm . Taking it to that level, there is a 2000 volt 500uF 1000 joule capacitor that is 2" dia x 4-1/8" long, and you'd get at least 25 shots out of 4 AA cells (for 2 bux) even with fairly lousy efficiency in the circuitry. That's twice the energy of the .45 ACP but still only half the energy of a .30-30 or 7.62mm Kurz (short). Still, not bad for an "air" rifle with no flash and no supersonic "crack". Subsonic bang is more difficult to auditorily localize because it contains less high frequency content. Phase resolution is therefore less with the fixed distance beween ears. What about pressure build time and attainable muzzle velocity? I can attest that a 50 joule photoflash cap will vaporize the end of a screwdriver with a report that sounds a lot more like the crack of a rifle than the bang of a pistol, which infers that it can dump its load rather quickly producing a hypersonic shockwave. Vaporizing water with a shot of energy would produce much more volume of expanding high-pressure gas to accelerate a projectile continuously thru the length of a barrel. However, an "air" rifle can not attain sonic velocity unless the "air" is quite hot, so higher energy infers large-caliber low-velocity bullets, most effective at ranges under 100 meters and probably best at less than 50 meters. It's an interesting idea. There'd be a few details to work out..... You figure the circuitry out..Ill build the Steamgun. Stainless steel of course. The water injection/volume control sounds a bit interesting to figure out..but if a steam engine can do it... Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#13
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Sun, 23 Apr 2006 07:39:50 GMT, Gunner
wrote: Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner this is an interesting project. I've been trying to accumulate enough scrap to make one for some time. still working on it. damn the chinese! there are no scrap merchants left in my neck of the woods who arent a siphon for material to china these days. ...anyway. there are two schools of thought regarding air rifles. the predominant school says that the gun must be heavy to make use of it's inertia for stability. I think that that is erroneous myself and I have won against the most expensive guns using a much battered club .177 air rifle. it is a a comparatively light rifle, the Sharp Innova made in japan. it is not a break back so the sighting on the barrel remains accurate. on the club ones an old martini henry ww1 rifle adjustable rear sight was fitted which was superb. (the kids just remembered their traverse and elevation settings and could pick the rifle up after someone else and be back shooting in a moment) The mechanism of this rifle is superb, very simple, and I originally though would be easy to make. (I'm sure it is if you amass the right materials.) I had a chance to measure one and from this I have an incomplete sketch that I will attempt to upload to the drop box later tonight. the barrel is in brass, 9.4mm (.37")od with a bore of .177" or 4.5mm thereabouts. it sits in a larger protective tube made in light steel which can become a little battered in use without affecting the barrel accuracy at all. the barrel sits about 5 - 10 mm proud of a parallel tube that contains the air pump and receiver. a short tube extends from the barrel down to the receiver. the tube is screwed into the barrel but just sits pressed to the outer surface of the receiver with an o ring making the seal. the aft end of the barrel is sealed by a bolt action which has a tapered pin extending from it to engage and align the rear of the air pellet.when home the bolt seals the barrel rear with a very small chamber formed behind the pellet. a 4mm dia hole extends from this chamber down to the receiver through the interconnecting tube. (I never recorded barrel lengths because I was after a shorter action) the air pump sits below the barrel. it is formed in a steel tube of 22mm od and 19mm id. at the foresight end and hanging down vertically when about ready to commence compression is a hinged lever. 4 1/4 inches from the hinge fulcrum is a joint to a short lever that returns back to the piston mechanism and actually drives this through a slot in the underside of the tube. the piston mechanism is just two pistons interconnected by a screw adjustable rod, the front piston has a slot machined in it which accepts the short driving lever, using a roll pin as the joining pivot. the actual pumping piston is in brass with an oiled bucket seal on the end.(I think it was leather) the pumping stroke is 4 1/4 inches. when this lever is pulled fully back it engages a detent which holds it against the barrel. in the detent position the air piston is fully home against the front face of the air receiver. the air receiver is a 19mm dia cylindrical brass piece, it is sealed to the pumping tube by a small o ring about a millimeter back from the front end. the front end has a conical face. this is sized so that the centre of the piston can sit almost hard up to it and it provides a small space for the bucket seal to sit without being crushed. in the centre is a small hole leading back into a chamber of maybe 3/8" dia. the front is sealed by a spring loaded ball. the compression of the piston unseating this ball to allow compressed gas back into the receiver. the complete receiver is 55mm long with about the rear 15mm taken up by the firing mechanism. the receiver chamber is probably 3/8 or so by maybe 30mm. (i never fully disassembled it) the rear of the receiver is a screw in piece, 19mm dia by 14mm thick with a 10-15mm nose piece protruding from it. this nose piece is threaded and screws into the back of the receiver chamber. through this piece is a polished/reamed 4mm dia hole. in the centre of this tube section there a 3 o rings sitting side by side to seal the pin. 10mm forward of the back face of this 14mm piece there is a transverse 4mm dia hole leading up to the interconnecting tube from the barrel. the air control pin is 45mm long and basically is a 4mm dia polished rod with a 7mm dia land 2.5mm thick sited back 17mm from the leading end. forward of this land the pin engages precisely into the rear of the receiver and is sealed by the o rings just forward of the transverse interconnecting hole. I cant recall what locates the receiver but I think it was a 6mm dia socket head capscrew up from the underside into the rear piece which may have been steel. a 16.5mm od washer 2 mm thick sits against the rear of the 7mm dia land on the firing pin. behind this is a spring, 9mm dia in .54mm spring wire. right at the rear of the piston tube is an internal thread. screwed into this is a 4mm blanking plate which has a 4mm hole in it to guide the air control pin. forwqard of this is a hard steel washer 6mm thick with a 12mm id hole, the purpose of which is to provide a home for the spring as the air control in drives back, preventing it being crushed. mounted in the stock immediately behind the pump barrel is the trigger block. the trigger sits below the trigger block, is pivoted roughly in its centre axis in profile, with a pawl on the rear edge which pushes up against the trigger block in turn pushing it up. there is an L shaped apperture plate which sits flush against the front face of the trigger block. the L extends back over the top where a spring sits to push it up from the top of the trigger block. the apperture plate has a 5mm by 6mm aperture. the trigger block has a 6mm dia hole back into it with a polyurethane block at its deepest point. at rest the apperture plate sits behind the air control pin and blocks its rearward movement. the hole in the trigger block sits below the pin axis and so provides a second safety. when the air pump is used the pressurisation pushes the pin back against the apperture plate, but all remains sealed at this point. in competition shooting on a 10m range 2 pumps are sufficient. it can take up to 11 pumps. when the trigger is eased back the trigger block is pushed upward moving the 6mm hole into position to receive the pin, the apperture plate stays still with the up spring being compressed. as the trigger pressure is increased the apperture plate is lifted until it disengages the pin. pressure fires the pin back, collecting the 16mm washer and return spring, at its rearward travel the polyurethane block decelerates the pin to a standstill. while this is happening the air rushes back with the pin, turns up through the 4mm hole and fills the small aperture behind the pellet driving it forward. with the pressure gone the return spring pushes the air control pin back to its forward position and gravity drops the trigger block back into position. the trigger block is steel, 21 x 9 x 14mm in size. the apperture L plate is 2.5mm thich hardened steel. ok? hopefully that will explain the sketch which I will now attempt to put in the dropbox. Stealth Pilot |
#14
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Sun, 23 Apr 2006 07:39:50 GMT, Gunner
wrote: Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner arrgh someone has purged my favourites. what is the url of the drop box? Stealth pilot |
#16
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
What specifically are you trying to accomplish?
I've built a CO2 powered gun for use against paintball tanks. It fires a foam projectile that I also build at 250 fps. It could easily be designed to shoot much harder. I ran into 2 tricky areas. The first one was making a projectile that wouldn't hurt somebody. The 2nd was getting O-rings that could handle the 800 + psi of CO2. Let me know if you'd like to see some pictures of my gun. If you want, I can help you design one to meet your criteria. "Gunner" wrote in message ... Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#17
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Gunner wrote:
On Mon, 24 Apr 2006 01:47:41 -0500, Don Foreman wrote: On Sun, 23 Apr 2006 21:33:24 GMT, Gunner wrote: On 23 Apr 2006 09:08:19 -0700, wrote: Gunner, Why not try something exotic such as an electrically fired gun? The propellant is a couple of drops of plain, old, water, through wich a heavy electric current is discharged from a capacitor. What do you think? Sounds interesting..and complicated. Im not much of an electronics tech to be frank. Board changer is more my skill level. Getting down to component level and I start to flounder. And I suspect that the power supply and caps bank needed to do instant electrolysis might be a bit heavy. I suspect that this isn't electrolysis but simply instant high-pressure hot steam produced by heat from a spark/arc. It's an interesting idea. A fairly powerful production air rifle has energy of about 30 joules (22 ft lb), as a .177 with 1100 fps muzzle velocity. This would not require a large capacitor. One available 48 joule 450-volt photoflash cap is 1-3/4" dia x 2-1/2" long. It could be charged in a few seconds with 4 AA cells and suitable circuitry. Four alkaline AA cells contain a total of about 29,000 joules, i.e. many shots! However, for perspective, a .22 rimfire short is about 157 joules. I don't know what energy the Lewis & Clark or Austrian infantry rifles had. However, musing on.... The original .45 ACP round in a long barrel (SMG) is about 520 joules. http://www.sightm1911.com/Care/45acp.htm . Taking it to that level, there is a 2000 volt 500uF 1000 joule capacitor that is 2" dia x 4-1/8" long, and you'd get at least 25 shots out of 4 AA cells (for 2 bux) even with fairly lousy efficiency in the circuitry. That's twice the energy of the .45 ACP but still only half the energy of a .30-30 or 7.62mm Kurz (short). Still, not bad for an "air" rifle with no flash and no supersonic "crack". Subsonic bang is more difficult to auditorily localize because it contains less high frequency content. Phase resolution is therefore less with the fixed distance beween ears. What about pressure build time and attainable muzzle velocity? I can attest that a 50 joule photoflash cap will vaporize the end of a screwdriver with a report that sounds a lot more like the crack of a rifle than the bang of a pistol, which infers that it can dump its load rather quickly producing a hypersonic shockwave. Vaporizing water with a shot of energy would produce much more volume of expanding high-pressure gas to accelerate a projectile continuously thru the length of a barrel. However, an "air" rifle can not attain sonic velocity unless the "air" is quite hot, so higher energy infers large-caliber low-velocity bullets, most effective at ranges under 100 meters and probably best at less than 50 meters. It's an interesting idea. There'd be a few details to work out..... You figure the circuitry out..Ill build the Steamgun. Stainless steel of course. The water injection/volume control sounds a bit interesting to figure out..but if a steam engine can do it... With limited amounts of oxygen present I wonder how much erosion there would be on the electrodes? Incidentally the velocity of sound in steam at 212F is about 1300 ft/sec, about 20% higher than the velocity of sound in air at standard temperature and pressure. Be interesting if you could hit .45ACP ballistics with an arc-steam gun. Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist -- --John to email, dial "usenet" and validate (was jclarke at eye bee em dot net) |
#18
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
If a guy had a free source of high-pressure helium, that might be even better because sonic velocity (hence max attainable muzzle velocity) is considerably higher in helium than in CO2. It's also considerably more difficult to contain. You'll have a tough time building seals for that. OTOH, compressed air is a little faster than CO2, able to generate higher pressures, and easy to get your hands on. |
#19
Posted to rec.crafts.metalworking
|
|||
|
|||
Here is what you are looking for...
http://www.burntlatke.com/bb.html
Machine the Vortex block from aluminum. "Gunner" wrote in message ... Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#20
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Don Foreman wrote: You figure the circuitry out..Ill build the Steamgun. Stainless steel of course. The water injection/volume control sounds a bit interesting to figure out..but if a steam engine can do it... The circuitry is no problem, but I have no idea at the moment how to initiate a rapid ( 1000 microseconds) capacitive discharge into a drop of water, other than perhaps a consumable electrode. Figuring that out (or not) would take some experimentation in hope of inspiration. Might be an interesting winter project, though. Add some salt or other mineral content to the water so it would take a charge? |
#21
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Here is a great link for an electrothermal rifle:
http://www.powerlabs.org/electrothermal.htm "Gunner" wrote in message ... Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#22
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Don Foreman wrote:
a few seconds with 4 AA cells and suitable circuitry. Four alkaline AA cells contain a total of about 29,000 joules, i.e. many shots! ... is 2" dia x 4-1/8" long, and you'd get at least 25 shots out of 4 AA cells (for 2 bux) even with fairly lousy efficiency in the circuitry. Even cheaper to use NiMH and they are better for short bursts of high current. BTW, how did you get 29,000? Four NiMH 2500mAh cells: 4*1.2volts*(2.5*3600Amp-seconds) = 44928 Joules Yes? Ted |
#23
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Don Foreman wrote:
On Mon, 24 Apr 2006 10:32:16 GMT, Gunner wrote: On Mon, 24 Apr 2006 01:47:41 -0500, Don Foreman wrote: On Sun, 23 Apr 2006 21:33:24 GMT, Gunner wrote: On 23 Apr 2006 09:08:19 -0700, wrote: Gunner, Why not try something exotic such as an electrically fired gun? The propellant is a couple of drops of plain, old, water, through wich a heavy electric current is discharged from a capacitor. What do you think? Sounds interesting..and complicated. Im not much of an electronics tech to be frank. Board changer is more my skill level. Getting down to component level and I start to flounder. And I suspect that the power supply and caps bank needed to do instant electrolysis might be a bit heavy. I suspect that this isn't electrolysis but simply instant high-pressure hot steam produced by heat from a spark/arc. It's an interesting idea. A fairly powerful production air rifle has energy of about 30 joules (22 ft lb), as a .177 with 1100 fps muzzle velocity. This would not require a large capacitor. One available 48 joule 450-volt photoflash cap is 1-3/4" dia x 2-1/2" long. It could be charged in a few seconds with 4 AA cells and suitable circuitry. Four alkaline AA cells contain a total of about 29,000 joules, i.e. many shots! However, for perspective, a .22 rimfire short is about 157 joules. I don't know what energy the Lewis & Clark or Austrian infantry rifles had. However, musing on.... The original .45 ACP round in a long barrel (SMG) is about 520 joules. http://www.sightm1911.com/Care/45acp.htm . Taking it to that level, there is a 2000 volt 500uF 1000 joule capacitor that is 2" dia x 4-1/8" long, and you'd get at least 25 shots out of 4 AA cells (for 2 bux) even with fairly lousy efficiency in the circuitry. That's twice the energy of the .45 ACP but still only half the energy of a .30-30 or 7.62mm Kurz (short). Still, not bad for an "air" rifle with no flash and no supersonic "crack". Subsonic bang is more difficult to auditorily localize because it contains less high frequency content. Phase resolution is therefore less with the fixed distance beween ears. What about pressure build time and attainable muzzle velocity? I can attest that a 50 joule photoflash cap will vaporize the end of a screwdriver with a report that sounds a lot more like the crack of a rifle than the bang of a pistol, which infers that it can dump its load rather quickly producing a hypersonic shockwave. Vaporizing water with a shot of energy would produce much more volume of expanding high-pressure gas to accelerate a projectile continuously thru the length of a barrel. However, an "air" rifle can not attain sonic velocity unless the "air" is quite hot, so higher energy infers large-caliber low-velocity bullets, most effective at ranges under 100 meters and probably best at less than 50 meters. It's an interesting idea. There'd be a few details to work out..... You figure the circuitry out..Ill build the Steamgun. Stainless steel of course. The water injection/volume control sounds a bit interesting to figure out..but if a steam engine can do it... The circuitry is no problem, but I have no idea at the moment how to initiate a rapid ( 1000 microseconds) capacitive discharge into a drop of water, other than perhaps a consumable electrode. Figuring that out (or not) would take some experimentation in hope of inspiration. Might be an interesting winter project, though. It occurs to me that the chamber could be a problem too--can't use metal or you'll arc from the electrode to the chamber wall instead of between electrodes. That's likely to limit the possible chamber pressure. It also occurs to me that if you pull this off at all you could run a series of electrodes timed to fire as the projectile passes--that could give you some _very_ hot gases in the chamber and might allow a quite remarkable muzzle velocity, _if_ you can contain them. Hmm, thinking further, why water? Vaporize a solid and you should get even more pressure. Instead of electrodes and water maybe a piece of carbon that gets vaporized? That way you use current and not voltage, and arcing over to the chamber walls becomes less of an issue, although you'll still need an insulator that will handle the pressure. Probably have to clean the barrel every few shots. Meanwhile, CO2 is probably more practical. If a guy had a free source of high-pressure helium, that might be even better because sonic velocity (hence max attainable muzzle velocity) is considerably higher in helium than in CO2. -- --John to email, dial "usenet" and validate (was jclarke at eye bee em dot net) |
#24
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Mon, 24 Apr 2006 10:55:23 -0500, Don Foreman
wrote: On Mon, 24 Apr 2006 10:32:16 GMT, Gunner wrote: On Mon, 24 Apr 2006 01:47:41 -0500, Don Foreman wrote: On Sun, 23 Apr 2006 21:33:24 GMT, Gunner wrote: On 23 Apr 2006 09:08:19 -0700, wrote: Gunner, Why not try something exotic such as an electrically fired gun? The propellant is a couple of drops of plain, old, water, through wich a heavy electric current is discharged from a capacitor. What do you think? Sounds interesting..and complicated. Im not much of an electronics tech to be frank. Board changer is more my skill level. Getting down to component level and I start to flounder. And I suspect that the power supply and caps bank needed to do instant electrolysis might be a bit heavy. I suspect that this isn't electrolysis but simply instant high-pressure hot steam produced by heat from a spark/arc. It's an interesting idea. A fairly powerful production air rifle has energy of about 30 joules (22 ft lb), as a .177 with 1100 fps muzzle velocity. This would not require a large capacitor. One available 48 joule 450-volt photoflash cap is 1-3/4" dia x 2-1/2" long. It could be charged in a few seconds with 4 AA cells and suitable circuitry. Four alkaline AA cells contain a total of about 29,000 joules, i.e. many shots! However, for perspective, a .22 rimfire short is about 157 joules. I don't know what energy the Lewis & Clark or Austrian infantry rifles had. However, musing on.... The original .45 ACP round in a long barrel (SMG) is about 520 joules. http://www.sightm1911.com/Care/45acp.htm . Taking it to that level, there is a 2000 volt 500uF 1000 joule capacitor that is 2" dia x 4-1/8" long, and you'd get at least 25 shots out of 4 AA cells (for 2 bux) even with fairly lousy efficiency in the circuitry. That's twice the energy of the .45 ACP but still only half the energy of a .30-30 or 7.62mm Kurz (short). Still, not bad for an "air" rifle with no flash and no supersonic "crack". Subsonic bang is more difficult to auditorily localize because it contains less high frequency content. Phase resolution is therefore less with the fixed distance beween ears. What about pressure build time and attainable muzzle velocity? I can attest that a 50 joule photoflash cap will vaporize the end of a screwdriver with a report that sounds a lot more like the crack of a rifle than the bang of a pistol, which infers that it can dump its load rather quickly producing a hypersonic shockwave. Vaporizing water with a shot of energy would produce much more volume of expanding high-pressure gas to accelerate a projectile continuously thru the length of a barrel. However, an "air" rifle can not attain sonic velocity unless the "air" is quite hot, so higher energy infers large-caliber low-velocity bullets, most effective at ranges under 100 meters and probably best at less than 50 meters. It's an interesting idea. There'd be a few details to work out..... You figure the circuitry out..Ill build the Steamgun. Stainless steel of course. The water injection/volume control sounds a bit interesting to figure out..but if a steam engine can do it... The circuitry is no problem, but I have no idea at the moment how to initiate a rapid ( 1000 microseconds) capacitive discharge into a drop of water, other than perhaps a consumable electrode. Figuring that out (or not) would take some experimentation in hope of inspiration. Might be an interesting winter project, though. Meanwhile, CO2 is probably more practical. If a guy had a free source of high-pressure helium, that might be even better because sonic velocity (hence max attainable muzzle velocity) is considerably higher in helium than in CO2. What if one used Hydrogen peroxide..consumer grade, rather than plain tap water? Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#25
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Mon, 24 Apr 2006 14:23:17 GMT, "Dave Lyon"
wrote: What specifically are you trying to accomplish? I've built a CO2 powered gun for use against paintball tanks. It fires a foam projectile that I also build at 250 fps. It could easily be designed to shoot much harder. I ran into 2 tricky areas. The first one was making a projectile that wouldn't hurt somebody. The 2nd was getting O-rings that could handle the 800 + psi of CO2. Let me know if you'd like to see some pictures of my gun. If you want, I can help you design one to meet your criteria. Cool. We can remove the criteria that it be unable to harm anyone. A gun of any sort will be dangerous if mishandled and frankly..more power is better in conjuction with a large heavy projectile. Gunner "Gunner" wrote in message .. . Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#26
Posted to rec.crafts.metalworking
|
|||
|
|||
Here is what you are looking for...
On Mon, 24 Apr 2006 16:35:22 GMT, "Terry Mayhugh"
wrote: http://www.burntlatke.com/bb.html Machine the Vortex block from aluminum. Interesting. Though I think making it from aluminum would not be a good idea, as those steel bbs would peen it out of shape pretty quickly. Steel with some case hardening would be better I think. Interesting concept though. Thanks! Gunner "Gunner" wrote in message .. . Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#27
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Mon, 24 Apr 2006 17:43:42 GMT, Ted Edwards
wrote: Don Foreman wrote: a few seconds with 4 AA cells and suitable circuitry. Four alkaline AA cells contain a total of about 29,000 joules, i.e. many shots! ... is 2" dia x 4-1/8" long, and you'd get at least 25 shots out of 4 AA cells (for 2 bux) even with fairly lousy efficiency in the circuitry. Even cheaper to use NiMH and they are better for short bursts of high current. BTW, how did you get 29,000? Four NiMH 2500mAh cells: 4*1.2volts*(2.5*3600Amp-seconds) = 44928 Joules Yes? Ted I used alkies because they're cheap and readily available, and I derated them because they don't deliver full rated amp-hours at higher discharge rates. 30 joules in 3 seconds is 10 watts or a bit over 2 amps at 4.8 volts. NiMH AA cells could probably do that, might need to go to D cells in alkaline. Lithiums would work and would be very lightweight, but they're pricey. |
#28
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Mon, 24 Apr 2006 14:23:17 GMT, "Dave Lyon"
wrote: What specifically are you trying to accomplish? I've built a CO2 powered gun for use against paintball tanks. It fires a foam projectile that I also build at 250 fps. It could easily be designed to shoot much harder. I ran into 2 tricky areas. The first one was making a projectile that wouldn't hurt somebody. The 2nd was getting O-rings that could handle the 800 + psi of CO2. Let me know if you'd like to see some pictures of my gun. If you want, I can help you design one to meet your criteria. "Gunner" wrote in message .. . I'd like to see that too. I'm specifically interested in the valving mechanism you used. I have a need to shoot maybe a dozen golfballs to break up some squirrel nests, and I have a 20-lb bottle of CO2. 250 fps would be more than I need. 100 ft/sec would get me about 150 ft of height, which should be ample since the squirrel nests are about 40 feet up. That'd keep things at a pretty safe 20 joules. A slingshot doesn't quite cut it. I need a large enough projectile to break up those nests, not just punch holes in them. |
#29
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Don Foreman wrote:
On Sun, 23 Apr 2006 07:39:50 GMT, Gunner wrote: Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. I'm contemplating a *low energy* golfball cannon suitable for decimating squirrel nests in a residential neighborhood. No plans yet. There's a clear field of fire for a good 300 feet to the south, with a 20' freeway sound wall behind it. I'm thinking max altitude of maybe 200 feet, which is about 10 joules of muzzle energy with a golfball. Best not try this in Wisconsin in the presence of a game warden, molesting squirrel nests, urban or rural, is verboten. David |
#30
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Tue, 25 Apr 2006 02:21:45 GMT, "David R. Birch"
wrote: Don Foreman wrote: On Sun, 23 Apr 2006 07:39:50 GMT, Gunner wrote: Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. I'm contemplating a *low energy* golfball cannon suitable for decimating squirrel nests in a residential neighborhood. No plans yet. There's a clear field of fire for a good 300 feet to the south, with a 20' freeway sound wall behind it. I'm thinking max altitude of maybe 200 feet, which is about 10 joules of muzzle energy with a golfball. Best not try this in Wisconsin in the presence of a game warden, molesting squirrel nests, urban or rural, is verboten. David The Wisconsin squirrels (and feral cats) are safe from me. |
#31
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
According to Stealth Pilot :
[ ... ] arrgh someone has purged my favourites. what is the url of the drop box? http://www.metalworking.com Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#32
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
"Don Foreman" wrote in message ... On Mon, 24 Apr 2006 14:23:17 GMT, "Dave Lyon" wrote: What specifically are you trying to accomplish? I've built a CO2 powered gun for use against paintball tanks. It fires a foam projectile that I also build at 250 fps. It could easily be designed to shoot much harder. I ran into 2 tricky areas. The first one was making a projectile that wouldn't hurt somebody. The 2nd was getting O-rings that could handle the 800 + psi of CO2. Let me know if you'd like to see some pictures of my gun. If you want, I can help you design one to meet your criteria. "Gunner" wrote in message .. . I'd like to see that too. I'm specifically interested in the valving mechanism you used. I have a need to shoot maybe a dozen golfballs to break up some squirrel nests, and I have a 20-lb bottle of CO2. 250 fps would be more than I need. 100 ft/sec would get me about 150 ft of height, which should be ample since the squirrel nests are about 40 feet up. That'd keep things at a pretty safe 20 joules. A slingshot doesn't quite cut it. I need a large enough projectile to break up those nests, not just punch holes in them. I didn't know how to use (or where it is) the board that you guys have for pictures, so I sent some to Don. Hopefully he'll be kind enough to post them. I included a crude iges file that I used to machine it from. Please don't assume this is a safe design. I am not an engineer, and we're dealing with some very high pressures. The gun shown operates from CO2. At room temperature, it is somewhere around 800 psi. The black hose connects to a standard CO2 tank used for paintball. They hold about 20 ozs, and can be worn on your back In the iges file, you can see on the left side of the plan view a large drilled hole (I think it was around .687) This is used as a reservoir to hold the CO2 ready for the next shot. With a bit of studying, you should be able to see the valve. It is held up to seal against the top by a spring. The valve has a very small air passage that allows the CO2 to bleed by it so the pressure is the same on both sides of the valve. There is a seal on the bottom side of the valve that is held in place by some bellville springs, a ball bearing, and the shape of the trigger. When the trigger is pulled, the air underneath the valve is allowed to escape very quickly. The spring can no longer hold the pressure that is above the valve, so it moves down allowing the gas to escape from the passageway leading to the barrel. |
#33
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
In article ,
Don Foreman wrote: I'd like to see that too. I'm specifically interested in the valving mechanism you used. I have a need to shoot maybe a dozen golfballs to break up some squirrel nests, and I have a 20-lb bottle of CO2. 250 fps would be more than I need. 100 ft/sec would get me about 150 ft of height, which should be ample since the squirrel nests are about 40 feet up. That'd keep things at a pretty safe 20 joules. A slingshot doesn't quite cut it. I need a large enough projectile to break up those nests, not just punch holes in them. Golfball crossbow? Might be simpler and quicker to build than air, with (perhaps) similar accuracy potential? -- Cats, coffee, chocolate...vices to live by |
#34
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
On Tue, 25 Apr 2006 14:02:11 GMT, "Dave Lyon"
wrote: "Don Foreman" wrote in message .. . On Mon, 24 Apr 2006 14:23:17 GMT, "Dave Lyon" wrote: What specifically are you trying to accomplish? I've built a CO2 powered gun for use against paintball tanks. It fires a foam projectile that I also build at 250 fps. It could easily be designed to shoot much harder. I ran into 2 tricky areas. The first one was making a projectile that wouldn't hurt somebody. The 2nd was getting O-rings that could handle the 800 + psi of CO2. Let me know if you'd like to see some pictures of my gun. If you want, I can help you design one to meet your criteria. "Gunner" wrote in message .. . I'd like to see that too. I'm specifically interested in the valving mechanism you used. I have a need to shoot maybe a dozen golfballs to break up some squirrel nests, and I have a 20-lb bottle of CO2. 250 fps would be more than I need. 100 ft/sec would get me about 150 ft of height, which should be ample since the squirrel nests are about 40 feet up. That'd keep things at a pretty safe 20 joules. A slingshot doesn't quite cut it. I need a large enough projectile to break up those nests, not just punch holes in them. I didn't know how to use (or where it is) the board that you guys have for pictures, so I sent some to Don. Hopefully he'll be kind enough to post them. I included a crude iges file that I used to machine it from. Please don't assume this is a safe design. I am not an engineer, and we're dealing with some very high pressures. The gun shown operates from CO2. At room temperature, it is somewhere around 800 psi. The black hose connects to a standard CO2 tank used for paintball. They hold about 20 ozs, and can be worn on your back In the iges file, you can see on the left side of the plan view a large drilled hole (I think it was around .687) This is used as a reservoir to hold the CO2 ready for the next shot. With a bit of studying, you should be able to see the valve. It is held up to seal against the top by a spring. The valve has a very small air passage that allows the CO2 to bleed by it so the pressure is the same on both sides of the valve. There is a seal on the bottom side of the valve that is held in place by some bellville springs, a ball bearing, and the shape of the trigger. When the trigger is pulled, the air underneath the valve is allowed to escape very quickly. The spring can no longer hold the pressure that is above the valve, so it moves down allowing the gas to escape from the passageway leading to the barrel. I can post your photos to the dropbox, but they want a .txt file (words) along with them to describe what the photos are of or about. What program opens an .IGS file? All I have for CAD SW is AutoCAD R-14. If you can convert that to DXF (version 14), I can convert that to Adobe .pdf . |
#35
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Don Foreman wrote:
On Sun, 23 Apr 2006 21:33:24 GMT, Gunner wrote: On 23 Apr 2006 09:08:19 -0700, wrote: Gunner, Why not try something exotic such as an electrically fired gun? The propellant is a couple of drops of plain, old, water, through wich a heavy electric current is discharged from a capacitor. What do you think? Sounds interesting..and complicated. Im not much of an electronics tech to be frank. Board changer is more my skill level. Getting down to component level and I start to flounder. And I suspect that the power supply and caps bank needed to do instant electrolysis might be a bit heavy. I suspect that this isn't electrolysis but simply instant high-pressure hot steam produced by heat from a spark/arc. It's an interesting idea. A fairly powerful production air rifle has energy of about 30 joules (22 ft lb), as a .177 with 1100 fps muzzle velocity. This would not require a large capacitor. One available 48 joule 450-volt photoflash cap is 1-3/4" dia x 2-1/2" long. It could be charged in a few seconds with 4 AA cells and suitable circuitry. Four alkaline AA cells contain a total of about 29,000 joules, i.e. many shots! However, for perspective, a .22 rimfire short is about 157 joules. I don't know what energy the Lewis & Clark or Austrian infantry rifles had. However, musing on.... The original .45 ACP round in a long barrel (SMG) is about 520 joules. http://www.sightm1911.com/Care/45acp.htm . Taking it to that level, there is a 2000 volt 500uF 1000 joule capacitor that is 2" dia x 4-1/8" long, and you'd get at least 25 shots out of 4 AA cells (for 2 bux) even with fairly lousy efficiency in the circuitry. That's twice the energy of the .45 ACP but still only half the energy of a .30-30 or 7.62mm Kurz (short). Still, not bad for an "air" rifle with no flash and no supersonic "crack". Subsonic bang is more difficult to auditorily localize because it contains less high frequency content. Phase resolution is therefore less with the fixed distance beween ears. What about pressure build time and attainable muzzle velocity? I can attest that a 50 joule photoflash cap will vaporize the end of a screwdriver with a report that sounds a lot more like the crack of a rifle than the bang of a pistol, which infers that it can dump its load rather quickly producing a hypersonic shockwave. Vaporizing water with a shot of energy would produce much more volume of expanding high-pressure gas to accelerate a projectile continuously thru the length of a barrel. However, an "air" rifle can not attain sonic velocity unless the "air" is quite hot, so higher energy infers large-caliber low-velocity bullets, most effective at ranges under 100 meters and probably best at less than 50 meters. It's an interesting idea. There'd be a few details to work out..... Just for the halibut I searched for "steam gun" with Google. Gess wot? http://tinyurl.com/kaosx and also this one from the US Civil War http://tinyurl.com/h68kv But I'm not sure that one used steam to squirt the projectile out of a barrel, there's mention of "centrifugal force". Maybe it was really just a steam powered projectile "flinger". Jeff -- Jeffry Wisnia (W1BSV + Brass Rat '57 EE) "Truth exists; only falsehood has to be invented." |
#36
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
In article , Gunner
wrote: Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner, there's some interesting info here on the Lewis & Clark air rifle, including extensive diagrams of the mechanisms in various states of safe, cocked, firing, etc. Seems to me a reasonably talented machinist can build something similar w/o too much difficulty. http://www.beemans.net/lewis%20assault%20rifle.htm -Frank -- Here's some of my work: http://www.franksknives.com/ |
#37
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
Gunner, there's some interesting info here on the Lewis & Clark air rifle, including extensive diagrams of the mechanisms in various states of safe, cocked, firing, etc. Seems to me a reasonably talented machinist can build something similar w/o too much difficulty. http://www.beemans.net/lewis%20assault%20rifle.htm -Frank Wow! that is a great page of info! You can bet I'll be studying that for my next gun. |
#38
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
I haven't followed this thread too closely, but you might look at "THE
MODERN PNEUMATIC AIRGUN - A PRACTICAL STEP BY STEP GUIDE TO BUILDING YOUR OWN" by H. M. Buckley I think it is a precharged pneumatic. Randy "Gunner" wrote in message ... Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
#39
Posted to rec.crafts.metalworking
|
|||
|
|||
Airgun plans?
You can get the book at http://www.gunbooks.co.uk/air-guns.cfm
"R. O'Brian" wrote in message news:ji65g.4329$B42.2144@dukeread05... I haven't followed this thread too closely, but you might look at "THE MODERN PNEUMATIC AIRGUN - A PRACTICAL STEP BY STEP GUIDE TO BUILDING YOUR OWN" by H. M. Buckley I think it is a precharged pneumatic. Randy "Gunner" wrote in message ... Anyone got a source for plans for making your own air rifle? Id like to machine one. Just about any type. Think it would be a fun project. Something run or charged from CO2 welding tank might be fun. Gunner "I think this is because of your belief in biological Marxism. As a genetic communist you feel that noticing behavioural patterns relating to race would cause a conflict with your belief in biological Marxism." Big Pete, famous Usenet Racist |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
The End of Pensions -- But Keep Voting for Republicans as You Spend Your Golden Years in a Cardboard Box on the Street | Metalworking | |||
rec.woodworking ANTI-FAQ Part 6 of 10 - Plans | Woodworking | |||
Peg-gear-clock Plans - Woodworking Plans | Woodturning | |||
FAQ | Woodworking | |||
Plans | Woodworking |