The internal combustion engine, for all its mechanical sophistication, still runs on a 19th-century mechanical idea: pistons rising and falling, a crankshaft spinning, a steam-age architecture ...

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

The history of the automobile has been dominated by vehicles equipped with piston-firing engines. Rarely does something completely different come along, and when it does, it usually fails miserably.

Supercharged Rotational ForceShock and awe have come to Route 66 Motorsports as Bill Jelinek and the crew at this shop in New Lenox, Illinois, have "uncrated" the newly-arrived General Motors ...

The Wankel rotary engine was made popular by Mazda, who built rotary style engines from in production cars such as the RX-7, ...