Rotary engine (disambiguation)

A rotary engine is a type of internal combustion piston engine used in some early aircraft, motorcycles, and cars. Almost the entire engine rotates about a fixed crankshaft.

Rotary engine may also refer to:


 * Pistonless rotary engine, a type of pistonless internal combustion engine
 * Turbine, a rotary engine that extracts energy from a fluid flow
 * Wankel engine, a common type of pistonless rotary engine used in some NSU Motorenwerke AG (NSU) and Mazda cars
 * Windmill, a rotary engine that extracts energy from wind
 * Waterwheel, a rotary engine that extracts energy from water