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The Lycoming O-320 is a large family of naturally aspirated, 320 cu in (5.2 L) air-cooled, horizontally-opposed four-cylinder, direct-drive engines produced by Lycoming Engines. Introduced in 1953, it is commonly used on light aircraft such as the Cessna 172 and Piper Cherokee , and remains in production as of 2024.
Produced. 1997–present. Developed into. Lycoming IO-390. The Lycoming IO-580 engine is a horizontally opposed, six-cylinder aircraft engine featuring three cylinders per side, manufactured by Lycoming Engines. [1] There is no carburetted version of the engine, which would have been designated O-580 and therefore the base model is the IO-580 ...
By 1961, Lycoming produced 600 to 700 engines per month. [17] Its most successful post-war products were a series of air-cooled flat-4 and flat-6 general aviation engines. Most famous among these are the O-320 and O-360 four-cylinder engines, and the O-540 six-cylinder engine.
1955–present. Developed into. Lycoming IO-390. Lycoming O-540. Lycoming IO-720. 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. [1]
Developed into. Lycoming ALF 502. The Honeywell T55 (formerly Lycoming; company designation LTC-4) is a turboshaft engine used on American helicopters and fixed-wing aircraft (in turboprop form) since the 1950s, and in unlimited hydroplanes since the 1980s. As of 2021, more than 6,000 of these engines have been built. [ 1 ]
The ECi O-320 is part of a family of normally aspirated, air-cooled, four-cylinder, direct-drive engines developed for certified and experimental aircraft. Its cylinders are arranged in horizontally opposed configuration and a displacement of 320 cubic inches (5.24 L). It is based on the Lycoming O-320 engine with ECi cylinder assemblies. [1][2]
Certified on 15 December 1987, the T67C was the last of the "civilian" variants, based on the T67B with an uprated 160 hp (120 kW) Lycoming O-320 engine, but without fuel injection and inverted-flight systems found on the T67M variants. Two blade constant speed prop.
A mechanic told NTSB investigators that, on or about July 2, he removed a Piper P-28-161 airplane's previously installed Lycoming O-320-D3G engine and installed a Lycoming O-320-D2B.