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Lycoming O-360

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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 hp (110 and 170 kW), with the basic O-360 producing 180 hp (130 kW).cite-ref-lycoming360specsheet-1-0[1]

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 hourscite-ref-lycoming360specsheet-1-1[1] or twelve years.cite-ref-twelveyears-2-0[2] 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.cite-ref-sf-3-0[3]

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.cite-ref-e286-4-0[4] The Lycoming IO-390 is an O-360 which has had its cylinder bore increased by 3⁄16 inch (4.8 mm), developing 210 hp (160 kW).cite-ref-io390-5-0[5]cite-ref-specsheet-6-0[6]

Contents

• Series

• Variants

• Applications

• Specifications (O-360-A1A)

• General characteristics

• Components

• Performance

• See also

• References

• External links

Series

The O-360 family of engines comprises 167 different models with 12 different prefixes. All have a 361 cu in (6 L) displacement and 5.125 and 4.375 in (130 and 111 mm) bore and stroke.cite-ref-e286-4-1[4]cite-ref-1e10-7-0[7]cite-ref-e26ea-8-0[8]cite-ref-e16ea-9-0[9]

• 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 aircraftcite-ref-faa-10-0[10]

• 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