No I did not. It did not occur to me but that is a very good
point with anything other than a robust direct drive prop.

As I recall these one rotor engines include a large rubber 
coupling and a gear box.

Paul Lamar

david mccandless wrote:

ACRE wrote: They are also the distant second largest wankel engine builder with over
400 single rotor engines shipped for motor glider use.

**** Hi Paul, did you ,per chance, mention the torsional vibration issue with single
rotor engines with Chris G? And if so,how has Diamond dealt with the problem in motor
gliders? Single rotor engines are running here in Australia in race cars, but of
course racers do not feel vibs as long as they get performance! BR, Dave McC

 
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