In 1954, Wankel finished designing a rotary piston engine for NSU known as the Drehkolbenmotor (or the DKM). This rotary-valve-controlled 250cc motorcycle engine was based on the company's Lux and ...

Dahm, no stranger to wild rotary cars himself, brings Garvin and his engine into the shop for a deep dive. The engine is giant, gorgeous, and utterly absurd.

When it comes to the new MX-30, Mazda is referring to it as a plug-in hybrid so it is possible that the rotary engine would only serve as a range extender in very specific situations.

LiquidPiston also received about $9 million from the DEVCOM Army Research Laboratory in 2022 to design, build and demonstrate an advanced, heavy-fueled 25 hp rotary combustion engine that produces ...