Lycoming O-360

From Freepedia

The Lycoming O-360 is an air-cooled, carburetted, four-cylinder, horizontally opposed piston aircraft engine.

Displacement is 361 cubic inches (5.9 liters). Bore and stroke are 5.125 and 4.375 inches (130 and 111 mm) respectively. Many minor variations exist, but perhaps the most common is the "high-compression" versions O-360-A series. They have an 8.5:1 compression ratio and are nominally rated at 180 horsepower at 2700 RPM at sea-level. They were originially type certificated on a short-lived 91/96 octane aviation fuel, but now are generally required to burn 100LL aviation fuel. Some installations allow for the substitution of automotive gasoline of 91 or higher anti-knock-index (R+M)/2 rating.

A low-compression (7:1) exists that nominally produces 168 horsepower at sea-level, but was installed in very few production aircraft. The O-360 is the slightly larger (identical bore, slightly stroked) version of the Lycoming O-320.

Nominal maximum continuous cruising power for the 180hp version is 75%, which consumes approximately 9.5-10 gallons of fuel per hour.

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