Franklin O-540

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 cuin. The power output was nominally 300 hp.

Variants

 * 8ACG-538 (XO-540-1):Geared propeller drive at 0.632:1, 300 hp at 3,200 rpm


 * 8ACSA-538 (XO-540-7):Supercharged, 300 hp


 * 8ACGSA-538 (XO-540-3/O-540-5): Supercharged and geared,330 hp at 3,200 rpm

Applications

 * Northrop N-9M