Wankel rotary engine powered thousands of aircraft. One of several problems: It spewed castor oil on its pilots.

Most car enthusiasts associate the term “rotary engine” with Felix Wankel’s invention, developed in the 1950s and most ...

The rotary engine was an unconventional design that delivered great power for its size. Here's what's good and bad about it.

In a world dominated by pistons, the rotary engine was something different for motorists. It was the vision of German engineer Felix Wankel, built on the belief that the up-and-down motion of pistons ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Although numerous rotary aircraft ...

Long before Felix Wankel became synonymous with rotary engines, an inventive Hungarian-American engineer named Stephen M. Balzer secured one of the earliest patents for a rotary-powered automobile on ...

Language is an imperfect medium, but it's what we've got, so let's go with it. Determining the swept volume of inventor Felix Wankel's rotary engine can generate more arguments than claiming what a GT ...