How weird and wonderful is the rotary engine, with its rebellious "why can't we do it like this" approach to automotive engineering? The rotary represents a compact, smooth, and quite mechanically ...

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 ...

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