-- snip --

Otherwise the Wankel, besides having small size which allows a narrow
fuselage, has excellent power density and vibration free smoothness. The
Wankel is also remarkably reliable and trouble free. The lack of vibration
means that stuff doesn't crack, break or fall off the motor and things
nearby - - a major positive attribute as compared to most 2-strokes.

-- snip --

What are fuel consumption ratios for 4-stroke, 2-stroke, wankel;
and typical engine weight ratios ?

I expect the wankel to be lightest and thirstiest, so that up to
a certain duration threshold its combined engine + fuel is
better/lighter.

== Chris Glur.