Lycoming 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 | |
|---|---|
 | |
| 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 |
Design and development
O-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
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
Specifications (GSO-480-A1A6)
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)
References
- 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.
- FAA Lycoming GSO-480 Series Type Certificate. Retrieved on 10 January 2009.