Franklin 12 series

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12 series
Franklin O-805-2.jpg
Type 12-cyl. horizontally opposed air-cooled piston engines
National origin United States
Manufacturer Franklin Engine Company

The Franklin 12 series of 12-cylinder air-cooled flat aircraft engines produced in the 1940s and 1950s, (US military designation O-805 was applied to the 12AC-806, 12ACG-806 and 12ACGSA-806).

Franklin 805.jpg

Variants[edit]

Data from:[1]

12AC-596
300 hp (224 kW) @ 2,600 rpm.
12ACG-596
350 hp (261 kW) @ 3,500 rpm.
12AC-806
450 hp (336 kW)0
12ACG-806
456 hp (340 kW) @ 3,200 rpm, geared to 0.632:1, (XO-805-1).
12ACGSA-806
500 hp (373 kW) @ 3,200 rpm, supercharged and geared to 0.632:1 (XO-805-3), or to 0.587:1 (O-805-5).
O-805
Military designation of the 12AC-806, 12ACG-806 and 12ACGSA-806.

Applications[edit]

Data from:[2]

See also[edit]

Related development
Related lists

Notes[edit]

References[edit]

Further reading[edit]

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