Franklin O-540
The Franklin O-540 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. The power output was nominally.
Variants
;8ACG-538 :Geared propeller drive at 0.632:1, at 3,200 rpm;8ACSA-538 :Supercharged,
;8ACGSA-538 : Supercharged and geared, at 3,200 rpm