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
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Culver XPQ-15
The Culver XPQ-15, also known as the XTD3C-1, was an American target drone developed by the Culver Aircraft Company late in World War II.
Design and development
The XPQ-15 was a low-wing monoplane of conventional design. It was powered by a Frank ...
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Doman LZ-1A
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Doman Pelican
Doman may refer to:
*Doman (surname)
*Doman (river), Caraș-Severin County, Romania
*Doman, a village in Reșița city, Caraș-Severin County, Romania
*Doman Helicopters, an American helicopter manufacturing company
*Doman (Khoikhoi) (died 1663), ...
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Fairchild XUC-86B
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Fleetwings XBQ-1
The Fleetwings BQ-1 was an early expendable unmanned aerial vehicle — referred to at the time as an " assault drone" — developed by Fleetwings during the Second World War for use by the United States Army Air Forces. Only a single example of ...
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Kellett XR-8
The Kellett XR-8 (later redesignated XH-8) was a helicopter built in the United States during World War II. It was a two-seat machine intended to demonstrate the feasibility of a twin-rotor system and, while it accomplished this, it also demons ...
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Sikorsky R-6
The Sikorsky R-6 is an American light two-seat helicopter of the 1940s. In Royal Air Force and Royal Navy service, it was named the Hoverfly II.
Development
The R-6/Hoverfly II was developed to improve on the successful Sikorsky R-4. In order to ...
Specifications (6AC-403/XO-405-1)
See also
References
;Notes
;Bibliography
* Gunston, Bill. (1986) ''World Encyclopedia of Aero Engines''. Patrick Stephens: Wellingborough. p. 57
{{US military piston aeroengines
Franklin aircraft engines
1940s aircraft piston engines
Boxer engines