Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

While most people might know rotary engines for their use in cars, a pair of companies made use of them in chainsaws — and ...

The rotary engine, a unique and unconventional design, has provided Mazda with remarkable advantages in the world of racing.