Vance will jump in here, protest and say it is a six cyl 3.9 L :) It matters not
whether Felix Wankel got two quarts in a pint pot or only one. The bottom line for any
engine is the physical overall size of the engine and its weight for the HP
generated reliably in aircraft service or aircraft engine
duty cycle.

You know Paul the difference between the 2 or 3 volumes per rotor will probably last forever. I believe with your evaluation that only fuel consumption or BSFC if you will amounts to anything in the discussion. the Rotary ins't perfect but especially when we get a good aluminum end and intermediate housing the pounds per HP will be extraordinary.
Bill Jepson

 
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