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Originally Posted by freebeard
Is this one more unicornish?
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Definitely more unicornish, as it seems even more expensive to manufacture.
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Do three points of sliding friction and two planetary gear sets have less friction than one main bearing?
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Even considering the piston pin as another point of sliding friction just like the main bearings, it would still sound more convincing than having to deal with 3 points of sliding friction and 2 planetary gearsets. Not to mention once again the need for more head gaskets and valvetrain parts as the engine would look more similar to a boxer on the outside. And even though this specific design doesn't seem to be so much more optimized for an oversquare bore-to-stroke ratio as the other, it would still make more sense to have fewer cylinders with a longer stroke from an efficiency standpoint.