Hi  all.
Is  there  anyone  in  the  group  with  a  rotary
powered  heli,  or  have  an  ongoing  helicopter
project  using  rotaries ?

Best regards.
Ben    Sison

Lots. Unfortunately most of them probably failed because
the designer underestimated the rotary cooling requirements.

A large fan mounted on the front of the e-shaft would be
called for and the engine derated for that power loss.

This was done well by Robinson.

The cooling air should be taken in at the very front and exited
at the rear to take every possible advantage of the waste heat.

Paul Lamar

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