Lycoming O-360

For a similarly named and broadly similar aircraft engine by another manufacturer, see Continental IO-360.
O-360
Lycoming IO-360-A1B6
Type Piston aircraft engine
National origin United States
Manufacturer Lycoming Engines
First run 1952
1963 (injected version)
Major applications Cessna 172 R & S
Cessna 177 Cardinal
Mooney M20
Produced 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]

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 hours[1] or twelve years.[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.[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.[4] The Lycoming IO-390 is an O-360 which has had its cylinder bore increased by 3⁄16 inch (4.76 mm), developing 210 hp (157 kW).[5][6]

  1. ^ a b Lycoming (2004). "360 Series" (PDF). Archived from the original (PDF) on November 26, 2010. Retrieved September 16, 2008.
  2. ^ Lycoming Engines (July 8, 2013). "Recommended Time Between Overhaul Periods" (PDF). Archived from the original (PDF) on September 13, 2013. Retrieved July 8, 2013.
  3. ^ Enfield, Samuel; Burr, R.; Badgett, R.; et al., eds. (April 15, 1966). Airboats (PDF) (Technical report). San Francisco: Army Concept Team in Vietnam. p. 2. R-1590 0. Archived from the original (PDF) on August 3, 2020 – via DTIC.
  4. ^ Cite error: The named reference E286 was invoked but never defined (see the help page).
  5. ^ Lycoming Engines (n.d.). "Lycoming IO-390-X". Retrieved January 7, 2009.{{cite web}}: CS1 maint: year (link)
  6. ^ Lycoming Engines (2004). "Specialty datasheet" (PDF). Retrieved December 20, 2008.