Ovulation.

"MountainCommand" (MountainCommand) 03/26/2014 at 23:37 • Filed to: ovalpistonsftw

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8

The act of being ovular.

Zipppy, Mazdurp builder, Probeski owner and former ricerboy > MountainCommand 03/26/2014 at 23:43

1

how well would that work? I'd imagine wear rates would be through the roof.

doodon2whls > MountainCommand 03/26/2014 at 23:45

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The NR750 engine was a bitchin' idea, but ring seals on an oval piston don't work very well... Hence, the RC30 and RC46 conventional piston V4 powered bikes.

MountainCommand > doodon2whls 03/26/2014 at 23:49

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They used them mostly for racing though right? So its not like they needed longer term reliability per say. Daily rebuilding. (forgive my ignorance on gp rules if im wrong)

Looking at oval pistons is like looking a rotary when you never seen one before. Its an enlightening feeling. Like, why didnt i think of doing that!

beardsbynelly - Rikerbeard > Zipppy, Mazdurp builder, Probeski owner and former ricerboy 03/26/2014 at 23:52

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the valves act like it's a 4 stroke V8 but the pistons act like a 2 stroke V-twin.

good for 20,000rpm

MountainCommand > Zipppy, Mazdurp builder, Probeski owner and former ricerboy 03/26/2014 at 23:54

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KillerRaccoon - Group J's Sébastien Loeb > MountainCommand 03/26/2014 at 23:58

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becoming*

KillerRaccoon - Group J's Sébastien Loeb > doodon2whls 03/26/2014 at 23:59

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The idea was to have V8 displacement while adhering to a 4-pot limit.

doodon2whls > MountainCommand 03/27/2014 at 00:00

2

In the end, it was a neat design excursion but made so many engine design details difficult that it wasn't worth the performance improvement.