The Franklin O-400 (company designation 8AC) was an American air-cooled aircraft engine of the 1940s. The engine was of eight-cylinder, horizontally-opposed layout and displaced 397 cu in (6.5 L). The power output was 235 hp (175 kW).

O-400/8AC
Type Piston aircraft engine
National origin United States
Manufacturer Franklin Engine Company
First run 1941

Variants

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8AC-398
200 hp (149 kW) at 2,600 rpm.
8ACG-398
235 hp (175 kW) at 3,500 rpm. The 8ACG-398 was unusual in using a reduction gearing for take-off and direct drive for cruising.

Specifications (8ACG-398)

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General characteristics

Components

Performance

  • Power output: 235 hp (175.2 kW) at 2,600 rpm

See also

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Related lists

References

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Notes
Bibliography
  • Gunston, Bill. (1986) World Encyclopedia of Aero Engines. Patrick Stephens: Wellingborough. p. 57