Axial Engine

[JB400]

https://rideapart.com/articles/duke-axial-motorcycle-engine

[pettybird]

I've seen that before and it's really cool looking.

It's probably a redneck invention...someone dropped some gasoline in a Sanden style A/C compressor and lit a match 

[A383Wing]

I just don't see how efficient it would be

[Baldwinvette77]

Its a variable displacement a/c compressor on steroids XD

[ws23rt]

I love this stuff   As I recall the wankle engine had a weak spot (the wipe seals)  It was a tough enough problem and may have been the primary reason the idea did not catch on very well.
That history makes me wonder about this engines sliding/sealing surface across the combustion chambers.  A tough place for a lasting seal.

[A383Wing]

yea, the tip or end seals were a problem with the rotary engine

[J.Bond]

Some where on utube, there is a video of an old, axial or radial motor in a car, early 1900's. That has a fixed crank shaft ,and the entire motor revolves, as opposed to just a spinning crankshaft. It's just something you don't see everyday.

http://www.youtube.com/embed/Y0XbqHUAI-0?feature=player_detailpage