Paul:

John Uptigrove's Mosquito helicopter is gaining momentum in the market.  I
believe he has already sold 200 kits (full or partial).  His XE model uses a
2 cylinder, 2 stroke 65hp engine and the XE3 uses a 3 cylinder version of
the engine and produces about 85hp.  I understand he's always checking out
alternative engines, and I suspect he's considered a rotary.

Helicopter's never have enough power, just as airplanes never go fast
enough, so I'd imagine an 85 hp rotary would be preferred.

Do you happen to know the status of the single rotor engines?  Who and what?
I went to the Rotamax site, but they don't show anything at this  time,
unless I missed something.

George CA

Thanks for the tip George. There are a couple one rotors in the
works from Europe. Diamond/Austro has delivered over 400 for motor glider
use. They are working on a larger version about 85 HP.
www.austroengine.at

Paul Lamar