twinradialengine
A twin radial engine is an aircraft propulsion arrangement that combines two radial piston engines to power a single airframe, or to provide redundancy in a compact installation. The two engines are typically mounted on a common frame and may drive a single propeller through a gearbox or, less commonly, drive separate propellers.
There are two main configurations: tied-crankcase units built to share a single crankcase or case assembled
Advantages include higher total power in a compact footprint and potential redundancy, useful for research aircraft
Historically, twin radial configurations were explored in the interwar and early postwar periods as an approach
See also: Radial engine; Twin-engine aircraft; Coupled engine; Aircraft propulsion.