Lycoming O-320 family
Lycoming O-320 is a family of four-cylinder, horizontally opposed, air-cooled aircraft piston engines with direct drive and 320 cubic inches of displacement. Its float-type carburetor supplies the induction system, which distributes the fuel-air mixture to the individual cylinders. The opposed-cylinder arrangement and direct mechanical output distinguish its architecture from a turbine engine; model suffixes identify different approved configurations within the family.
Identity
- Aliases
- O-320Lycoming 320 Series
- Domains
- aviation
- Identity Level
- family
- Kind
- piston-engine
- Name
- Lycoming O-320 family
- Status
- active
Details
- Description
- Lycoming O-320 is a family of four-cylinder, horizontally opposed, air-cooled aircraft piston engines with direct drive and 320 cubic inches of displacement. Its float-type carburetor supplies the induction system, which distributes the fuel-air mixture to the individual cylinders. The opposed-cylinder arrangement and direct mechanical output distinguish its architecture from a turbine engine; model suffixes identify different approved configurations within the family.
- Developers
- Manufacturers
- Piston Specs
- Aspiration
- naturally aspirated
- Configuration
- horizontally opposed
- Cylinder Count
- 4
- Displacement
- …
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 23:29:09 UTC
- Updated Time
- October 17, 2026 at 14:05:35 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Note
- Defines the O-320 family boundary and explicitly includes O-320-A2B, O-320-A2C, and O-320-B2C among the affected models.
- Publisher
- Lycoming Engines
- Title
- O-320 Operator's Manual
- Accessed Date
- 2026-07-29
- Note
- Maps O-320-A2B/A2C to standard R22 aircraft, O-320-B2C to R22 HP/Alpha/Beta, and O-360-J2A to Beta II/Mariner II; publishes their rated and derated power.
- Publisher
- Robinson Helicopter Company
- Title
- R22 Maintenance Manual — Chapter 6, Powerplant