This article is about the 1959-era geared, eight-cylinder aircraft engine series. For the 1997 six-cylinder engine, see
Lycoming IO-580.
TheLycoming GSO-580 is a family of eight-cylinderhorizontally opposed,supercharged,carburetor-equipped aircraft engines for both airplanes andhelicopters, manufactured byLycoming Engines in the late 1950s and early 1960s.[1][2]
The family includes the original GSO-580fixed-wing aircraft engine series, as well as the laterSO-580 andVSO-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.[1][2]
Design and development
[edit]The GSO-580 family of engines covers a range from 375 hp (280 kW) to 400 hp (298 kW). All have adisplacement of 578 cubic inches (9.47 litres) and the cylinders have air-cooledheads. Compared to other horizontally opposed engines of similar displacement this family of engines produces high output power by supercharging and high maximum rpm, at the cost of higher weight.[1][2]
The GSO-580 series wascertified under Type Certificate 256, while the SO-580 and VSO-580 series were certified under type certificate 285. Both were manufactured under Production Certificate No. 3.[1][2]
- O-580-1
- Military variant similar to the GSO-580-D[citation needed]
- GSO-580
- Eight-cylinder, horizontally opposed, geared-drive, supercharged, 578 cubic inches (9.47 litres), 375 hp (280 kW) at 3300 rpm for take-off, 320 hp (239 kW) at 3000 rpm continuous, dry weight 619 lb (281 kg), Bendix PSH-9BDE carburetor. Minimum fuel grade 91/98avgas. Designation indicatesGeared, Supercharged, Opposed.[1]
- GSO-580-B
- Eight-cylinder, horizontally opposed, geared-drive, supercharged, 578 cubic inches (9.47 litres), 400 hp (298 kW) at 3300 rpm for take-off, 350 hp (261 kW) at 3000 rpm continuous, dry weight 624 lb (283 kg), Bendix PSH-9BDE carburetor. Minimum fuel grade 100/130 avgas. Designation indicatesGeared, Supercharged, Opposed.[1]
- GSO-580-C
- Eight-cylinder, horizontally opposed, geared-drive, supercharged, 578 cubic inches (9.47 litres), 375 hp (280 kW) at 3300 rpm for take-off, 320 hp (239 kW) at 3000 rpm continuous, dry weight 604 lb (274 kg), Bendix PS-9BDE carburetor. Minimum fuel grade 91/98 avgas. Designation indicatesGeared, Supercharged, Opposed.[1]
- GSO-580-D
- Eight-cylinder, horizontally opposed, geared-drive, supercharged, 578 cubic inches (9.47 litres), 400 hp (298 kW) at 3300 rpm for take-off, 350 hp (261 kW) at 3000 rpm continuous, dry weight 608 lb (276 kg), Bendix PS-9BDE carburetor. Minimum fuel grade 100/130 avgas. Designation indicatesGeared, Supercharged, Opposed.[1]
- SO-580-A1A
- Eight-cylinder, horizontally opposed, geared-drive, supercharged, 578 cubic inches (9.47 litres), 400 hp (298 kW) at 3300 rpm for take-off, 350 hp (261 kW) at 3000 rpm continuous, dry weight 596 lb (270 kg), Bendix PS-9BDE carburetor. Minimum fuel grade 100/130 avgas. Designation indicatesSupercharged, Opposed. Designed for horizontal or up to 35 degrees nose-up helicopter installation.[2]
- SO-580-A1B
- Eight-cylinder, horizontally opposed, geared-drive, supercharged, 578 cubic inches (9.47 litres), 400 hp (298 kW) at 3300 rpm for take-off, 350 hp (261 kW) at 3000 rpm continuous, dry weight 578 lb (262 kg), Bendix PS-9BDE carburetor. Minimum fuel grade 100/130 avgas. Designation indicatesSupercharged, Opposed. Designed for horizontal or up to 35 degrees nose-up helicopter installation.[2]
- VSO-580-A1A
- Eight-cylinder, horizontally opposed, geared-drive, supercharged, 578 cubic inches (9.47 litres), 400 hp (298 kW) at 3300 rpm for take-off, 350 hp (261 kW) at 3000 rpm continuous, dry weight 592 lb (269 kg), Bendix PS-9BDE carburetor. Minimum fuel grade 100/130 avgas. Designation indicatesVertical-mounted, Supercharged, Opposed. Designed for vertical helicopter installation.[2]
- GSO-580
- SO-580
Specifications (VSO-580-A1A)
[edit]Data from FAA AIRCRAFT ENGINE SPECIFICATION E-285, Revision 2[2]
General characteristics
- Type: 8-cylinder fuel-injected horizontally opposed, vertically mounted, helicopter engine
- Bore: 4.875 in (123.8 mm)
- Stroke: 3.875 in (98.4 mm)
- Displacement: 578 cu in (9.47 L)
- Dry weight: 592 lb (269 kg) dry
Components
- Supercharger: 7.91:1 drive ratio
- Fuel system: Bendix PS9BDE carburetor
- Fuel type: 100/130avgas minimum
- Cooling system: air-cooled
Performance
Related lists
