Lycoming_O-480 Knowpia

GO-480
	Lycoming GO-480-B1 on display at the Deutsches Museum Flugwerft Schleissheim
Type	Piston aero-engine
National origin	United States
Manufacturer	Lycoming Engines
First run	1953
Major applications	Dornier Do 27 ; Helio Courier ; Utva 66
Produced	1954–1986 out of production
Developed from	Lycoming O-320

The Lycoming GO-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.

Design and development edit

GO-480 series engines are installed on a number of different aircraft types.^[1] Their main competitive engines are the Continental IO-520 and IO-550 series.

Variants edit

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.^[2]^[3] 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 at a lower RPM than the engine.^[1]

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.^[1]

IGSO-480: Supercharger driven by the engine, gearbox to drive propeller, with fuel Injection. Designated the O-480-3 by the US military.^[1]

IGO-480: Gearbox to drive propeller, normally aspirated with fuel injection.^[1]

Applications edit

Specifications (GSO-480-A1A6) edit

Data from FAA Type Certificate.^[3]

General characteristics

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 (226 kg)

Components

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)

Performance

Power output: 340 hp at 3,400 rpm at sea level
Compression ratio: 7.3:1

References edit

^ ^a ^b ^c ^d ^e Page listing all variants of the Lycoming O-480 series. Retrieved on 10 January 2009.
^ FAA GO-480 Series Type Certificate. Retrieved on 10 January 2009.
^ ^a ^b FAA Lycoming GSO-480 Series Type Certificate. Retrieved on 10 January 2009.

[L2-1] Page listing all variants of the Lycoming O-480 series. Retrieved on 10 January 2009.

[TC275-2] FAA GO-480 Series Type Certificate. Retrieved on 10 January 2009.

[TC284-3] FAA Lycoming GSO-480 Series Type Certificate. Retrieved on 10 January 2009.

[1]

[2]

[3]

Summary