If you've never seen the inside of a rotary engine, be prepared for a surprise, because you won't recognize much.

He dreamed up a light plane with a rotary engine.

Work on the rotary engine, which powered many early aircraft up until about 1920.

He was granted a patent in 1944 for a rotary engine.

Considerable effort went into designing rotary engines in the 1950s and 1960s.

The development of the rotary engine was very cost-intensive for the small company.

After that they were eclipsed by the new, light rotary engines.

However, both continue to be called rotary engines and only the context determines which type is meant.

The power delivery in a rotary engine is also smoother.

The Atkinson cycle can be used in a rotary engine.