Lycoming O-360

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]

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 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]

Series

The O-360 family of engines comprises 167 different models with 12 different prefixes. All have a 361-cubic-inch (5.92-liter) displacement and 5.125 and 4.375 in (130.2 and 111.1 mm) bore and stroke.[4][7][8][9]

  • O-360 carbureted series
  • HO-360 horizontally mounted series for helicopter installation
  • LO-360 same as O-360, but with left-hand rotating crankshaft, for use in pairs on twin-engined aircraft[10]
  • TO-360 turbocharged series
  • LTO-360 turbocharged left-hand rotation series
  • IO-360 fuel-injected series
  • LIO-360 same as IO-360, but with left-hand rotating crankshaft
  • AIO-360 inverted mount (dry sump aerobatic) fuel-injected series
  • AEIO-360 aerobatic fuel-injected series
  • HIO-360 horizontally mounted fuel-injected series for helicopters
  • LHIO-360 left-hand rotation, fuel-injected, horizontally mounted for helicopters
  • TIO-360 turbocharged and fuel-injected series

Variants
Main article: List of Lycoming O-360 variants

Applications
Piper PA-44-180 Seminole features two Lycoming O-360 engines
O-360
LO-360
IO-360
LIO-360
An LIO-360 on the starboard wing of a Piper PA-34-200 Seneca I.
AIO-360
AEIO-360
HIO-360
LHIO-360

Specifications (O-360-A1A)

Data from Type Certificate Data Sheet E-286[4]

General characteristics

Components
  • Fuel type: 91/96 avgas minimum grade[13]
  • Oil system: 8 US qt (8 L) wet sump
  • Cooling system: air-cooled

Performance
  • Power output: 180 hp (134 kW) at 2700 rpm
  • Compression ratio: 8.5:1
  • Fuel consumption: 7.8 US gal (30 L) to 9 US gal (34 L) per hour[14]

See also

Related lists

References
  1. 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. Federal Aviation Administration (August 2009). "Type Certificate Data Sheet No. E-286 Revision 20" (PDF). Retrieved September 9, 2011.
  5. Lycoming Engines (n.d.). "Lycoming IO-390-X". Retrieved January 7, 2009.
  6. Lycoming Engines (2004). "Specialty datasheet" (PDF). Retrieved December 20, 2008.
  7. Federal Aviation Administration (January 10, 2018). "Type Certificate Data Sheet No. 1E10 Revision 28" (PDF). Retrieved January 26, 2019.
  8. Federal Aviation Administration (March 1986). "Type Certificate Data Sheet No. E26EA Revision 4". Retrieved January 18, 2009.
  9. Federal Aviation Administration (March 1986). "Type Certificate Data Sheet No. E16EA Revision 5". Retrieved January 18, 2009.
  10. Federal Aviation Administration (July 13, 2004). "Airplane Flying Handbook" (PDF). Archived from the original (PDF) on September 21, 2012. Retrieved September 18, 2012.
  11. Mooney Aircraft, Inc. (March 1967). Executive 21 Owners Manual.
  12. Federal Aviation Administration (February 2007). "Docket No. FAA-2006-25948; Directorate Identifier 2006-NE-32-AD; Amendment 39-14951; AD 2007-04-19". Archived from the original on July 13, 2011. Retrieved March 9, 2009.
  13. Lycoming (2010). "Lycoming Service Instruction 1070Q" (PDF). Archived from the original (PDF) on November 17, 2011. Retrieved November 3, 2011.
  14. "O-360, HO-360, IO-360, AIO-360, HIO-360 & TIO-360 Operator's Manual". lycoming.com. Retrieved July 11, 2018.
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