Lycoming GSO-580

GSO-580
Type Piston aero-engine
Manufacturer Lycoming Engines
Major applications Beechcraft Model 34
Fairchild XNQ
Produced 1948–1961

The Lycoming GSO-580 is a family of eight-cylinder horizontally opposed, supercharged, carburetor-equipped aircraft engines for both airplanes and helicopters, manufactured by Lycoming Engines in the late 1950s and early 1960s.

The family includes the original GSO-580 fixed-wing aircraft engine series, as well as the later SO-580 and VSO-580 helicopter engines. There is no non-supercharged, non-geared version of the engine, which would have been designated O-580 and therefore the base model is the GSO-580.