h a l f b a k e r yFewer ducks than estimates indicate.
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An engine simalar in layout to two inline engines joined at the heads, most likely arranged horizontally to create a flat and wide engine.
The pistons would reciprocate on a common cylinder, in sync so they travel towards and away from each other, nearly meeting in the center. A variety of valve
systems may work. Perhaps a combination of slide valves and/or ports simalar to a 2-stroke.
Benefits include a very low center of gravity and a large possible displacement. Because it's not very tall, you can pack lots of goodies up top, like turbochargers and other fun things. It would also be easier to change the shape of the flame front because piston design is not limited by a typical combustion chamber.
Doxford Opposed-Piston Main Propulsion Marine Engines
http://www.oldengin.../Marine/doxford.htm
Very thoroughly baked in Sunderland UK from 1890 to 1970s [phlogiston, Oct 04 2004, last modified Oct 05 2004]
Deltic
http://www.fact-ind.../napier_deltic.html
[Fussass, Oct 04 2004, last modified Oct 05 2004]
Fairbanks-Morse
http://gelwood.rail...anual/fm-index.html
[Fussass, Oct 04 2004, last modified Oct 05 2004]
Dyna-Cam Engines
http://www.dynacam....esign_overview.html
"Cylinders of both blocks line up so that six double-ended pistons can fire back and forth between the aligned cylinders of each block " [Klaatu, Oct 04 2004, last modified Oct 05 2004]
As UB points out Commer also baked this
http://www.oldengin...l/Technical/TS3.htm
Go to the bottom of the page for cutaway drawings [Gordon Comstock, Oct 04 2004, last modified Oct 05 2004]
Dair aero engine
http://www.dair.co.uk/
Just what [KLRico] ordered [squigbobble, Aug 28 2005]
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You mean this idea has nothing to do with cat-dog mutations or conjoined fighting opponents? |
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//nearly meeting in the center// that's where your third chamber is. You have a single cylinder with two pistons sliding in it dividing it into three separate volumes. Power is coupled to the outside magnetically; permanent magnets in the pistons and coils in the cylinder walls to make a generator. Could work for modern hybrid cars. |
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Actually, it should be "Thai Boxer." |
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I thought this was going to be about Muy Thai |
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So this isn't underwear for two? |
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I changed the title to something more descriptive. I shall cease my pitiful attempts at being witty. ;-) |
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What was it before? Siamese Pistons? Siamese Briefs (??) Akh, now I can't sleep.. |
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I've always loved the idea of harnessing the pistons' power magnetically, kbecker. Only problem is, permanent magnets demagnetize when they get hot (at the Curie temperature). Which rather unfortunately unbakes that elegant croissant. |
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i think Subaru made these too, their was enuf room to put the spare tire on top of the engine |
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Engines built this way have been widely used for railway locomotives: Fairbanks-Morse in the States, and the Napier Deltic in UK. The same engines are still used in submarines, other ships, and electrical generation. |
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Sounds like the Dyna-Cam engine. <link> |
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This is baked right this very second :D Even in the 2 cylinder configuration that [KLRico] envisaged (see link) although he/she probably wasn't thinking of a diesel. |
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But surely all this would mean is that the power would be halved for each set of cylinders, so in affect it's just identical to one engine? Which would be even smaller, and even lighter. |
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