Lycoming O-540
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The Lycoming O-540 is a family of six-cylinder, horizontally opposed aircraft engines of 541.5 cubic inch (8.87 l) displacement, made by Lycoming Engines. The engine is a 6 cylinder version of the 4 cylinder Lycoming O-360.
Generally these engines produce 230 to 315 horsepower (172 to 235kW). They are installed on many Aero Commanders, Piper Navajos, Piper Chieftains, Cessnas, Piper Aztecs, Piper Saratogas, Piper PA-24 Comanches, Britten-Norman Trislanders, Robinson R44, EADS Socatas, and the Aerostar line of aircraft. The AEIO version was developed to match high performance aerobatic competition. Starting at 260hp, the power was then improved to 300hp. The AEIO-540 family has proven tremendous results in competition aircraft such as the Extra 300, CAP 232 and Zivko Edge 540. The Gippsland Aeronautics GA8 also uses the Lycoming IO-540-K1A5. Their main competitive engine is the Continental IO-520 and IO-550 series.
[edit] Variants
All engines will have an additional prefix preceding the 540 to indicate the specific configuration, based on the aircraft the engine is used on.
- O-540 - standard, direct-drive, normally aspirated engine, equipped with a carburetor
- IO-540 - normally aspirated engine with fuel injection
- AEIO-540 - normally aspirated engine with fuel injection and inverted lubrication for aerobatic use
- TIO-540 - turbocharged, fuel injected
- IGSO-540 - geared output with supercharger and fuel injection (up to 435hp)
