Its my understanding that arrangement is called a "Scotch Yoke" and Bourk
was not the first to use it. I am of the belief that bearing loads have been
the downfall of this design due to the low area of support between the crank
throw and yoke. I saw some drawings and pictures o a "Barrel Engine"
Australian free piston wobble plate drive a few years ago that was supposed
to be the next new thing. I have heard its now FAA certified and tried to get
to there web page, but failed. Anyone know anything about this thing?
Rich Fox
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