From the December 1969 issue of HOT ROD: After talking about Wankel engines for years, foreign automobile manufacturers started producing the revolutionary powerplants—and they really worked.

There’s a new spin on the rotary engine. Liquid Piston, a Connecticut-based engineering firm, has turned the classic Wankel engine design inside out to create a more efficient, and cleaner ...

The engine's main advantage is a greater power density than a Wankel can achieve because a more-balanced design allows the motor to rev higher—so says Peter King, one of two partners at REDA.

Felix Wankel, a German engineer who invented the rotary engine, is born on Aug. 13, 1902, in Lahr, Germany. Wankel, a gifted mathematician with a knack for technical drawing, became fascinated ...

One of the rotary engine's biggest champions, AIE has been advancing rotary design since 2012. Its latest release shows that Wankel engines can be a perfect fit for compact, power-demanding ...

So, a Wankel engine needs constant oil top-ups while dealing with the products of that burnt oil. And those apex seals wear down. "[The Wankel] has this long, skinny, moving combustion chamber.

Mazda was an early and steadfast proponent of the Wankel engine. It signed a development contract with NSU in 1959 and displayed its 2-rotor and 4-rotor Wankel engines at the 1964 Tokyo Motor Show.

Though the rotary diesel never really got beyond the prototype stage of development in the past, the concept has merit. It's a lightweight, compact engine with a good power-to-weight ratio.

For a time, the Wankel rotary engine seemed like the future. In 1963, German automaker NSU—later absorbed into Audi—debuted the Wankel Spider, the first internal-combustion production car not ...

So take everything you know about the Wankel and turn it literally inside out. Moreover, Shkolnik says the company solved the age-old, meme-worthy problem surrounding the rotary engine: its apex ...

Wheels reports that a Mazda executive confirmed to the press that Mazda is continuing to develop the Wankel rotary engine concept, dead since the 2012 discontinuation of their RX-8 sports car.