Soon after the invention of the conventional internal combustion engine, engineers realized that a tremendous savings in both weight and energy could be realized if the combustion of gasoline could be used to produce rotary motion directly instead of...

The Wankel rotary engine is a type of internal combustion engine, invented by German engineer Felix Wankel, which uses a rotor instead of reciprocating pistons. This design delivers smooth high-rpm power from a compact, lightweight...