All this has nothing to do with whether it has wings or not
and as I understand it limits the speed of all helicopters.
Good luck :-)

Retreating blade stall is the limiting speed in forward flight on
helicopters.
Royce

anyone can email me directly to discuss the concepts of Mu, retreating blade
stall, flapping, autorotation, and helicopter powered flight vs. gyroplane
flight profiles...

let's allow this list to continue to be a wankel guru site!!

Gary Buster
Bridgeport, Texas
mrgcb@netcommander.com

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