The Franklin O-540 (company designation 8AC) was an American air-cooled aircraft engine that first ran in the early-1940s. The engine was of eight-cylinder, horizontally-opposed layout and displaced 540 cu in (9 L). The power output was nominally 300 hp (224 kW).
|Type||Piston aircraft engine|
|National origin||United States|
|Manufacturer||Franklin Engine Company|
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