It doesn't belong to me (how I wish ). A friend of mine is an engine collector and bought one just because he wanted a Wankel to complete his collection. He wanted to see it run, so I helped him set it up to break it in in my backyard. It runs beautifully and probably has the power of a good BB .36 piston engine. I was surprised at how much vibration it produced though. I would have thought rotaries are much smoother. Sounds pretty much like any old 2stroke glow engine - may be a tad mellower.

The machining on it is just gorgeous to look at. It is a jewel in every sense of the word. The backplate says Graupner, so I'm not sure who produced it or if OS purchased the license to manufacture from Graupner.

Never did put it on a plane, unless... you can call the sawhorse we mounted it on "a plane". the wingloading on that thing is atrocious, consequently "the plane" never took off.