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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. |
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#1
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massive yet tiny engine
I first read about this in nasa tech briefs last month.
Has anybody seen this thing first hand? http://www.gear6.net/2006/04/the_myt_massive.html |
#2
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massive yet tiny engine
Jon Grimm wrote:
I first read about this in nasa tech briefs last month. Has anybody seen this thing first hand? http://www.gear6.net/2006/04/the_myt_massive.html Hopefully it wasn't patented. Because that construction is about 80 years old! And when you look at the "cylinders" you know why it was given up. Nick -- Motor Modelle // Engine Models http://www.motor-manufaktur.de DIY-DRO // Eigenbau-Digitalanzeige http://www.yadro.de |
#3
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massive yet tiny engine
Hopefully it wasn't patented. Because that construction is about 80 years old! And when you look at the "cylinders" you know why it was given up. They will have had to make some serious advances in cylinder ring sealing technology for this to work. That many sets of rings traveling on the same circular path without the benefit of oil (from below in a conventional engine) will be a real challenge. Karl |
#5
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massive yet tiny engine
This is a variation of the old "cat and mouse" engine, with a toroidal track
instead of a cylindrical one (in the original versions, the cylinder axis is coaxial with the coaxial shafts that drive the "pistons" around. See US patent 5,433,179 for one example). There was one version with ball shaped pistons running in a similar toroidal track. Interesting design. I played around with variations once, but that was for a pump, when Edwards High Vacuum was looking for novel vacuum pump designs and I worked for the parent company's R&D center. -- Bob (Chief Pilot, White Knuckle Airways) "Stealth Pilot" wrote in message ... On Fri, 5 May 2006 10:06:27 +0200, (Nick Müller) wrote: Jon Grimm wrote: I first read about this in nasa tech briefs last month. Has anybody seen this thing first hand? http://www.gear6.net/2006/04/the_myt_massive.html Hopefully it wasn't patented. Because that construction is about 80 years old! And when you look at the "cylinders" you know why it was given up. Nick I cant see how it could possibly work. the leading piston moves as expected but the trailing piston has the exact same force on it pushing backwards. the video shows it to move forward as though there were no resisting force on it. the design is a load of codswallop. cant possibly function as indicated. Stealth Pilot |
#6
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massive yet tiny engine
"Stealth Pilot" wrote
I cant see how it could possibly work. the leading piston moves as expected but the trailing piston has the exact same force on it pushing backwards. the video shows it to move forward as though there were no resisting force on it. the design is a load of codswallop. cant possibly function as indicated. Well it does seem to run on compressed air. Notice that the lead piston moves forward faster than the trailing one. That seems to indicate some sort of gearing mechanism around the shaft. However, his website does not have any mention of running it on any fuels yet and when they run it on compressed air their body language seems to indicate that they are treating it like a quart bottle of nitroglycerin. :-) -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com |
#7
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massive yet tiny engine
Jon Grimm wrote:
I first read about this in nasa tech briefs last month. To shed some more light onto that "invention" of torodial "cylinders": There is a similar concept -looking at the cylinder- that is known as the "Beck-Motor". Not that much different is the "Primat-motor". The other construction -without looking to close at the one posted- is the "Esselbé-Motor". The "Esselbé" has been adopted by "Torodial Aircraft Motors Company". Similar to that one is the Bradshaw-Omega-Motor. "Beck-Motor": French construction from 1909 with 8 pistons in a single torus-"cylinder". "Primat-motor": Two pistons. The cylinder is a half circle. Again a torus. No more info at hand. "Esselbé-motor": French construction during WW I, 1912 (so I was off about 10 years with my first guess). 4 pistons, again a torus as "cylinder". The gear to drive the pistons looks like a clockwork. "Torodial Aircraft Motors Company": Company was in Omaha/Nebraska. Time built 1930. One version air cooled, the other water cooled. "Bradshaw-Omega-motor": Adoption of the Esselbé by Granville Bradshaw in the 1950. He claimed that this engine is very compact, has low friction and only a few moving parts. He also intended to build a Diesel engine. 4 samples have been built and were running. 4 stroke. 'Nuff for googling around or visiting a technical library, guys! :-)) Nick -- Motor Modelle // Engine Models http://www.motor-manufaktur.de DIY-DRO // Eigenbau-Digitalanzeige http://www.yadro.de |
#8
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massive yet tiny engine
On Fri, 05 May 2006 04:36:09 GMT, Jon Grimm wrote:
I first read about this in nasa tech briefs last month. Has anybody seen this thing first hand? http://www.gear6.net/2006/04/the_myt_massive.html Every time I see someone with a creative new engine design, I can't help but ask how much waste heat it produces. For the most part, you either get usable output or waste heat from an engine. What's the ratio please? If they can't answer the question, or get all evasive, or start talking about space aliens or USING LOTS OF CAPS AND EXCLAMATION POINTS!!!!! then you pretty much have the score. |
#9
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massive yet tiny engine
Nick Müller wrote:
Jon Grimm wrote: I first read about this in nasa tech briefs last month. Has anybody seen this thing first hand? http://www.gear6.net/2006/04/the_myt_massive.html Hopefully it wasn't patented. Because that construction is about 80 years old! That explains the quite retro look of what appears to be a crank handle on the left end. G Jeff -- Jeffry Wisnia (W1BSV + Brass Rat '57 EE) "Truth exists; only falsehood has to be invented." |
#10
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massive yet tiny engine
Reminds me a little of the le Rhone radial.. Still, if it runs on
compressed air some maniac could make one with a transparent "cylinder" so it could be studied a bit more. Not sure it will work at all, frankly, in terms of producing power though; there seems to be a healthy dose of hokum here.. ;-) -- "Steamboat Ed" Haas : Whatever happened Hacking the Trailing Edge! : to Porgy Tirebiter? www.nmpproducts.com ---Decks a-wash in a sea of words--- |
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