Lycoming O-360

The Lycoming O-360 is a family of four-cylinder, direct-drive, horizontally opposed, air-cooled, piston aircraft engines. Engines in the O-360 series produce between 145 and 225 horsepower (109 to 168 kW), with the basic O-360 producing 180 horsepower.

The engine family has been installed in thousands of aircraft, including the Cessna 172, Piper Cherokee/Archer, Grumman Tiger, and many home-built types. It has a factory rated time between overhaul (TBO) of 2000 hours or twelve years. O-360 family engines are also widely used in airboats, most notably in the Hurricane Aircats used by the US Army during the Vietnam War.

The first O-360 certified was the A1A model, certified on 20 July 1955 to United States CAR 13 effective March 5, 1952 as amended by 13-1 and 13-2. The Lycoming IO-390 is an O-360 which has had its cylinder bore increased by 3⁄16 inch (4.76 mm), developing 210 hp (157 kW).

Series

The O-360 family of engines comprises 167 different models with 12 different prefixes. All have a 361-cubic-inch (5.92-liter) displacement and 5.125 and 4.375 in (130.2 and 111.1 mm) bore and stroke.

• O-360 carbureted series
• HO-360 horizontally mounted series for helicopter installation
• LO-360 same as O-360, but with left-hand rotating crankshaft, for use in pairs on twin-engined aircraft
• TO-360 turbocharged series
• LTO-360 turbocharged left-hand rotation series
• IO-360 fuel-injected series
• LIO-360 same as IO-360, but with left-hand rotating crankshaft
• AIO-360 inverted mount (dry sump aerobatic) fuel-injected series
• AEIO-360 aerobatic fuel-injected series
• HIO-360 horizontally mounted fuel-injected series for helicopters
• LHIO-360 left-hand rotation, fuel-injected, horizontally mounted for helicopters
• TIO-360 turbocharged and fuel-injected series

Variants

Applications

O-360

LO-360

• Beechcraft Duchess
• Piper PA-44-180 Seminole

IO-360

LIO-360

• Piper PA-34 Seneca I
• Diamond DA42

AIO-360

• Stephens Akro

AEIO-360

• Aero-Cam Slick 360
• Aviat Eagle II
• American Champion Super Decathlon
• Extra EA-200
• FFA AS-202 Bravo
• Great Lakes Sport Trainer
• Grob G 115E
• Mudry CAP 10
• Peña Capeña
• Pitts Special
• Tech Aero TR 200
• Valmet L-70 Vinka
• Zlín Z 242

HIO-360

• Enstrom F-28
• OH-23 Raven
• Schweizer 300

LHIO-360

• Silvercraft SH-3
• Silvercraft SH-4

Specifications (O-360-A1A)

Data from Type Certificate Data Sheet E-286

General characteristics

• Type: Four-cylinder, dual magneto, horizontally opposed, four-stroke aircraft engine
• Bore: 5.125 in (130 mm)
• Stroke: 4.375 in (111 mm)
• Displacement: 361 cu in (5,916 cc)
• Dry weight: 258 lb (117 kg)

Components

• Fuel type: 91/96 avgas minimum grade
• Oil system: 8 US qt (8 L) wet sump
• Cooling system: air-cooled

Performance

• Power output: 180 hp (134 kW) at 2700 rpm
• Compression ratio: 8.5:1
• Fuel consumption: 7.8 US gal (30 L) to 9 US gal (34 L) per hour

See also

• Superior Air Parts Vantage

Related lists

• List of aircraft engines

References

External links

• Lycoming Homepage
• "Operator's Manual O-360, HO-360, IO-360, AIO-360, HIO-360 & TIO-360 Series" (PDF). Lycoming. October 2005.