The Franklin O-405 (company designation 6AC-403) was an American air-cooled aircraft engine of the 1940s. The engine was of six-cylinder, horizontally-opposed layout and displaced . The power output was between and depending on variant. The O-405-9 (6ACV-403) was a vertically mounted, fan cooled version for helicopters.
Variants 6AC-403 (XO-405-1) at 2,750 rpm
6ACSA-403 (XO-405-3)Supercharged, at 2,750 rpm
6ACGSA-403 (O-405-5) Supercharged, geared propeller drive at 0.632:1. at 3,200 rpm
6ACV-403 (O-405-9)Vertically mounted, fan-cooled helicopter version, at 3,275 rpm
Applications Culver XPQ-15 Doman LZ-1A Doman Pelican Fairchild XUC-86B Fleetwings XBQ-1 Kellett XR-8 Sikorsky R-6
Specifications (6AC-403/XO-405-1)
See also
References
Notes
Bibliography
Gunston, Bill. (1986) World Encyclopedia of Aero Engines. Patrick Stephens: Wellingborough. p. 57