I am currently looking at replacing the engine in my plane with a rotary
one. I had thought to use a single rotor unit but I have been given the
chance to get a almost new Renesis one (<10,000 Km). I have looked up
the net and found the spec of the engine I would set the max revs at
4500 rpm (for take off) and  cruise < 4000.  Can anyone suggest a ball
park for fuel consumption given the average altitude would be < 2000
Feet ABMSL
Col Dale


Kind of heavy for direct drive and only 120 HP.
A 4500 RPM prop or ducted fan is very inefficient.

That means your MPG will be horrible. A rotary NEEDS a gear box.

Paul Lamar

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