From Wikipedia, the free encyclopedia
This article is about the 1959-era geared, eight-cylinder aircraft engine series. For the 1997 six-cylinder engine, see
Lycoming IO-580 .
The Lycoming GSO-580 is a family of eight-cylinder
horizontally opposed ,
supercharged ,
carburetor -equipped aircraft engines for both airplanes and
helicopters , manufactured by
Lycoming Engines in the late 1950s and early 1960s.
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The family includes the original GSO-580
fixed-wing aircraft engine series, as well as the later SO-580 and VSO-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.
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Design and development
The GSO-580 family of engines covers a range from 375 hp (280 kW) to 400 hp (298 kW). All have a
displacement of 578 cubic inches (9.47 litres) and the cylinders have air-cooled
heads . 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.
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The GSO-580 series was
certified 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.
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Variants
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 91/98
avgas . Designation indicates Geared, Supercharged, Opposed .
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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 indicates Geared, 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 indicates Geared, 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 indicates Geared, 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 indicates Supercharged, Opposed . Designed for horizontal or up to 35 degrees nose-up helicopter installation.
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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 indicates Supercharged, Opposed . Designed for horizontal or up to 35 degrees nose-up helicopter installation.
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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 indicates Vertical-mounted, Supercharged, Opposed . Designed for vertical helicopter installation.
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Applications
GSO-580
SO-580
Specifications (VSO-580-A1A)
Data from FAA AIRCRAFT ENGINE SPECIFICATION E-285, Revision 2
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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: 100/130
avgas minimum
Cooling system: air-cooled
Performance
See also
Related lists
References