Lycoming O-480

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

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

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)

Performance

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

References

Wikimedia Commons has media related to Lycoming O-480.

^ ^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.

v t e Lycoming aircraft engines
Opposed piston engines	O-145 O-233 IO-233 O-235 O-290 O-320 O-340 O-360 (O-360 variants) IO-390 O-435 O-480 O-540 TIO-541 GSO-580 IO-580 IO-720 O-1230
Radial engines and H engines	R-680 XR-7755 XH-2470
Aircraft diesel engines	DEL-120
Turbofans	PLF1 ALF 502/YF102 LF 507
Turboprops/Turboshafts	AGT1500 LTS101/LTP101 T53 T55
Aero-derivative marine gas turbines	TF-40
Joint development	Avco (Lycoming)/Pratt & Whitney: T800-APW (Turboshaft)
See also	AlliedSignal Aerospace/Honeywell Aerospace

v t e United States military piston aircraft engine designation system
H (four-bank H-configuration inline)	H-1640 XH-2240 XH-2470 XH-2600 XH-3130 XH-3730 H-4070
IV (inverted-V inline)	IV-1430 IV-2040 IV-2220
L (single-bank inline)	L-330 L-365 L-375 L-390 L-410 L-440 L-510 L-825
O (opposed)	O-15 O-40 O-45 O-90 O-100 O-145 O-150 O-170 O-175 O-180 O-190 O-200 (C) O-200 (F) O-205 O-235 O-290 O-300 O-335 O-360 (C) O-360 (L) O-405 O-425 O-435 O-470 O-480 O-520 O-540 (F) O-540 (L) O-550 O-580 O-805 O-1230
R (radial)	R-250 R-265 R-270 R-370 (LB) R-370 (K) R-420 R-440 R-500 R-540 (W) R-540 (K) R-545 R-550 R-600 R-670 R-680 R-720 R-755 R-760 R-790 R-830 R-915 R-975 DR-980 R-985 R-1044 R-1300 R-1340 R-1454 R-1510 R-1535 R-1640 R-1670 R-1690 R-1750 R-1820 R-1830 R-1860 R-2000 R-2060 R-2160 R-2180 R-2600 R-2800 R-3350 R-4090 R-4360 XR-7755
V (upright-V inline)	V-720 V-1150 V-1237 V-1400 V-1440 V-1460 V-1510 V-1560 V-1570 V-1650 (P) V-1710 V-1950 V-3420
V (inverted-V inline)	V-770 V-1650 (L)
VG (inverted-V inline)	VG-1410
W (three-bank W-configuration inline)	W-2779
See also: X-1800 US military gas turbine aeroengines Piston engine configurations

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