h a l f b a k e r yWhy on earth would you want that many gazelles anyway?
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This is an ICE engine design for opposed engines. In this design the two cylinders are not offset but directly opposite one another (line bored). Instead of conventional rods and pistons a single beam with pistons on each end is utilized. At the center a conventional single journal crank is present but
instead a connecting rod bolted around it it lies at the edge of a round disk in which it enacts the stroke orbit. This disk is mounted in a journal mounted in the center of the piston beam. By rotating through an entire 360* the crank moves the piston beam back and forth one time. Engine balance is achieved using a 180 offset mated pair and crank counterweights/balance shaft. Baked, right? Can't find it, haven't looked enough..... gotta work...
Bourke Engine
http://bourke-engine.com/
Similar, but 2-stroke and crank scavenged. Also the idea seems dead. [WcW, Oct 10 2009]
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Annotation:
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Certainly Baked, early 20th century, in both motorcycle and aviation engines. Anzani ? There were some VERY odd early designs....... mostly 2-strokes. |
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seems like the Bourke engine is similar in design. Love everything about it, however the patent holders seem to think that it is the best thing since cold fusion, too good to actually build (conspiratorial feeling at best). Linky - |
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It seems like that would cause quite a few vibrations if both pistons were going the same direction at the same time, then jerking back the opposite way. |
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And by vibrations I mean the vehicle would break in half. |
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thus you need a mated pair and counterweights. This is really no more challenging than balancing an H4. |
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there has been a design, do not know reference
other than a book called 'Bil og Energi' ('Cars and
Energy') by Mogens Teisen, which has one single
cylinder bore, with two opposing pistons, and a
lower sitting crank, which is connected to the two
pistons. (it could be a Cummins design,..). |
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This was used is war and post-war English lorries. |
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