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Franklin O-225

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(Redirected from Franklin 4A4)
O-225/4A/4A4
Type Piston aircraft engine
National origin United States
Manufacturer Franklin Engine Company
First run 1945

The Franklin O-225 (company designation 4A/4A4) was an American air-cooled aircraft engine that first ran in the mid-1940s. The engine was of four-cylinder, horizontally-opposed layout and displaced 225 cu in (4 L). The power output was between 75 hp (56 kW) and 125 hp (93 kW) depending on the version.

Variants

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4A4-75
75 hp (56 kW) at 1,950 rpm
4A4-85
85 hp (63 kW) at 2,200 rpm
4A4-100
100 hp (75 kW) at 2,550 rpm
4A-225
100 hp (75 kW) at 2,800 rpm

Applications

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Specifications (4A4-100)

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Data from [citation needed]

General characteristics

Components

  • Cooling system: Air-cooled

Performance

  • Power output: 100 hp (75 kW) at 2,550 rpm

See also

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Comparable engines

Related lists

References

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