The Ranger L-440 (company designation 6-440C) are American six-cylinder inline inverted air-cooled aero-engines produced by the Ranger Aircraft Engine Division of the Fairchild Engine and Airplane Corporation of Farmingdale, New York, United States. The engine was mainly produced for Fairchild's family of training aircraft in the mid-1930s.
- 175hp variant with a 6:1 compression ratio.
- 180hp variant with a 6.2:1 compression ratio.
- 190hp variant with a 6.8:1 compression ratio.
- 200hp variant with a 7.5:1 compression ratio.
Data from 
- Type: Six-cylinder inline inverted air-cooled
- Bore: 4 1⁄8 in (104.8 mm)
- Stroke: 5 1⁄2 in (139.7 mm)
- Displacement: 441 in³ (7.2 litres)
- Length: 53.156 in (1.351 m)
- Width: 21.954 in (0.549 m)
- Height: 33.50 in (0.854 m)
- Dry weight: 376 lb (170.7 kg)
- Valvetrain: Underhead camshaft
- Fuel system: Upright carburetor
- Fuel type: 65 octane rating gasoline
- Oil system: Full pressure type
- Cooling system: air-cooled (pressure type cylinder baffles)
- Comparable engines
- Related lists
- ^ a b c d e Bridgeman 1988
- Bridgman, Leonard (1988). Jane's Fighting Aircraft of World War II. New York: Crescent Books. ISBN 0-517-67964-7.