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Lycoming O-480
BMW GO-480-B1A6


lyc-o-480



The Lycoming O-480 is a family of six-cylinder, horizontally opposed fixed-wing aircraft engines of 479.6 cubic inch (7.86 l) displacement, made by Lycoming Engines. The engine is a six-cylinder version of the four-cylinder Lycoming O-320.

O-480 series engines are installed on a number of different aircraft types. Their main competitive engines are the Continental IO-520 and IO-550 series.

Variants:
All engines have an additional prefix preceding the 480 to indicate the specific configuration of the engine. Although the series is known as the "O-480", there are only geared engines in the series. There are also numerous engine suffixes, denoting different accessories such as different manufacturers' carburetors, or different magnetos.

GO-480
Normally aspirated Opposed engine, equipped with a carburetor and Gearbox at the front end of the crankshaft to drive the propeller fewer revolutions per minute than the engine.

GSO-480
Supercharger driven by the engine, gearbox to drive propeller, and equipped with a carburetor. Designated the O-480-1 by the US military.

IGSO-480
Supercharger driven by the engine, gearbox to drive propeller, with fuel Injection. Designated the O-480-3 by the US military.

IGO-480
Gearbox to drive propeller, normally aspirated with fuel injection.

Applications:
Aero Commander 560, 560A, 560E and 680, 680E and the pressurized 720 Alti-Cruiser.
Aermacchi AM3CM (Bosbok)
Beechcraft Twin Bonanza
Beechcraft Queen Air
Dornier Do 27
Helio Courier
Soko J-20 Kraguj
Temco 58
Utva 66

Specifications:

GSO-480-A1A6
Type: Six-cylinder air-cooled geared supercharged horizontally opposed engine
Bore: 5.125 in (130 mm)
Stroke: 3.875 in (98 mm)
Displacement: 479.6 in³ (7.86 l)
Dry weight: 498 lb dry
Valvetrain: Two overhead valves per cylinder
Supercharger: 11.27:1 ratio, providing 48" Hg (1.6 atm / 8.8 psi) manifold pressure at sea level at maximum power
Fuel type: 100 octane rating gasoline
Cooling system: Air-cooled
Reduction gear: 77:120 (.642:1)
Power output: 340 hp at 3,400 rpm at sea level
Compression ratio: 7.3:1

 

 


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