Franklin O-405
The Franklin O-405 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 was a vertically mounted, fan cooled version for helicopters.Variants
;6AC-403 : at 2,750 rpm
;6ACSA-403 :Supercharged, at 2,750 rpm
;6ACGSA-403 : Supercharged, geared propeller drive at 0.632:1. at 3,200 rpm
;6ACV-403 :Vertically mounted, fan-cooled helicopter version, at 3,275 rpmApplications
- Culver XPQ-15
- Doman LZ-1A
- Doman Pelican
- Fairchild XUC-86B
- Fleetwings XBQ-1
- Kellett XR-8
- Sikorsky R-6
