Harry Wrote> > I think that the main considerations here are:-

1)  Torque is the issue rather than hp; no worries as the M/C rear wheel

torque

(rev & drop clutch) are far higher than will be encountered here
2)  Ballancing of the "hub" may be more critical as it will be going 6K+

rpm as

opposed to <200rpm ?  in a M/C wheel

Wrathall Mark wrote:

Good point on torque. Centering and balancing the damper is an issue. We
have been discussing this at work, and it also came up on this forum when
Paul posted his PSRU design about a year ago. I have been wondering whether
a teflon bushing will survive if used to center the driven part of the
damper, with it's attached sun gear, to the driving part. There should be
no rotatation, more a vibration. Hopefully this weekend I will have time to
finsh drawing up my rough draft, so I can post it for comment.

As to you suggestion of a belt drive. I understand the advantages, but am
pretty allergic to killing one of the big advantages of the rotary for
aviation (low frontal area) with a belt drive.
Mark Wrathall

 
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