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This engine uses a triangular rotor that spins inside of a housing. This engine uses the standard "suck Squish Bang Blow" of most internal combustion engines. But the Wankel Rotary engine does this in an interesting way, there are obviously three sides to a triangle and each side is in one part of the cycle, so as one side is in the intake "stroke" of its cycle the next side is in compression, and the next of in expansion. This along with its light weight rotating assembly make it a happy at high RPM's.
Contributed by Kyle Rowe