Radial engine timing and cam mechanism (see full resolution)
Radial engine of a biplane
Master rod (upright), slaves and balances from a two-row, fourteen-cylinder Pratt & Whitney Twin Wasp
Mounting of a Wright R-2600 Twin Cyclone engine on a North American B-25 Mitchell bomber, 1942
The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is called a "star engine" (German Sternmotor, French moteur en étoile, Japanese hoshigata enjin, Italian Motore Stellare) in some languages. The radial configuration was commonly used for aircraft engines before gas turbine engines became predominant.
