Although there was briefly a company called Rotary Rocket, the term is much better known as a nickname for the Mazda RX-7 — one of the few cars that used a Wankel, or rotary, engine. If you ever ...

Take the Wankel engine, or rotary engine, for example ... The 13B motors featured a twin-rotor design, and were based on the earlier 12A Wankel engine, not the 13A as some mistakenly allude ...