Franklin O-500

The Franklin O-500 (company designation 6AL-500 and 6A8-215) was an American air-cooled aircraft engine that first ran in the mid-1940s. The engine was of six-cylinder, horizontally-opposed layout and displaced 500 cu in (8 L). The power output was 215 hp (160 kW).

O-500/6AL/6A8
Type Piston aircraft engine
National origin United States
Manufacturer Franklin Engine Company
First run 1945

Variants

6AL-500
(alternative designation) 215 hp (160 kW) at 2,500 rpm, with crankcase/prop-shaft extension for pusher installation.
6A8-215-B8F
215 hp (160 kW) at 2,500 rpm, with crankcase/prop-shaft extension for pusher installation.
6A8-215-B9F
same as B8F but with different ignition components.

Applications

Specifications (6AL-500 / 6AB-215-B8F)

Data from Aircraft engines of the World 1950.[1]

General characteristics

  • Type: 6-cylinder air-cooled horizontally opposed aircraft piston engine
  • Bore: 5 in (127.0 mm)
  • Stroke: 4.25 in (108.0 mm)
  • Displacement: 500.76 cu in (8.2 L)
  • Length: 66.3 in (168.4 cm)
  • Width: 33.9 in (86.1 cm)
  • Height: 27.4 in (69.6 cm)
  • Dry weight: 488 lb (221 kg)

Components

  • Valvetrain: 1x OHV exhaust and inlet per cylinder operated by push-rods and rockers
  • Fuel system: 1x Marvel-Schebler MA4-5 updraught carburetor
  • Fuel type: 80 octane Gasoline
  • Oil system: Pressure feed at 35–45 psi (2.4–3.1 bar)
  • Cooling system: Air-cooled with cooling fan and shrouds

Performance

See also

Comparable engines

Related lists

References

  1. Wilkinson, Paul H. (1950). Aircraft engines of the World 1950 (8th ed.). London: Sir Isaac Pitman & Sons Ltd. p. 152-153.

Further reading

  • Gunston, Bill (1986). World encyclopaedia of aero engines. P. Stephens. p. 57. ISBN 9780850597172.
  • Gunston, Bill (2006). World Encyclopaedia of Aero Engines (5th ed.). Stroud: Sutton Publishing. ISBN 978-0-7509-4479-3.
  • Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2nd ed.). Cambridge, England: Patrick Stephens Limited. ISBN 978-1-85260-163-8.
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