Lycoming O-720

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The 0-720 engine is unique amongst contemporary aero-engines in that it is a flat, eight-cylinder design featuring four cylinders per side.^{[citation needed]} It displaces 720 cubic inches and is not common.^{[citation needed]} Certain conversions of the Beechraft Queen Air, Twin Bonanza and Aero Commander utilze this engine, as well as the Piper 400 Comanche. The engine is typically fuel-injected and produces 400 h.p. It is not, as sometimes reported, two 0-360 engines bolted together,^{[citation needed]} though it shares many features with the smaller engine.