Armstrong Whitworth F.K.10
| FK.10 | |
|---|---|
 |
|
| F.K.10 | |
| Type | Fighter |
| Manufacturer | Armstrong Whitworth |
| Designed by | Frederick Koolhoven |
| Maiden flight | 1916 |
| Number built | 9 (1 F.K.9 + 8 F.K.10) |
The Armstrong Whitworth F.K.10 was a British two seat quadruplane (i.e. four sets of wings) fighter aircraft built by Armstrong Whitworth during the First World War. While it was ordered in small numbers for the Royal Flying Corps and for the Royal Naval Air Service it was not used operationally. It is one of the few aircraft with the unusual quadruplane configuration to reach production.
Development
The F.K.10 was designed in 1916 by Frederick Koolhoven[1], the chief designer of Armstrong Whitworth Aircraft as a single engined two seat fighter. Koolhaven chose the novel quadruplane (i.e. four sets of wings) layout, also used by Pemberton-Billing (later known as Supermarine) for the P.B.29E and Supermarine Nighthawk anti-Zeppelin aircraft, and the contemporary Wight Quadruplane scout. At roughly the same time, Sopwith were building the successful Sopwith Triplane fighter.
The first prototype, the F.K.9 [2] was built and first flown in the summer of 1916, powered by a 110 hp Clerget 9Z engine. It had a shallow fuselage, with the wings joined by plank-like interplane struts[3], similar to those used by the Sopwith Triplane. After evaluation at the Central Flying School in late 1916, a production order for 50 was placed by the RFC for a modified version, the F.K.10[2].
The production F.K.10 had a new, deeper fuselage, and a new tail, but retained the wing planform of the F.K.9. The F.K.10 showed inferior performance to the Sopwith 1½ Strutter, which was already in service as a successful two seat fighter, and only five were built of the RFC order, with a further three built for the RNAS[2]. They were not used operationally and the design was not developed further[3].
Variants
- F.K.9
- Prototype powered by 110 hp Clerget 9Z engine.
- F.K.10
- Production version with revised fuselage and tail, powered by 130 hp Clerget 9B or Le Rhône 9J engine. 50 ordered, 8 built.
Operators
Specifications (F.K.10 (130 hp Clerget))
Data from Warplanes of the First World War, Fighters Volume One, Great Britain [3]
General characteristics
- Crew: One
- Length: 22 ft 3 in (6.78 m)
- Wingspan: 27 ft 10 in (8.48 m)
- Height: 11 ft 6 in (3.50 m)
- Wing area: 390 ft² (26.3 m²)
- Empty weight: 1,236 lb (562 kg)
- Loaded weight: 2,019 lb (918 kg)
- Powerplant: 1× Clerget 9B rotary engine, 130 hp (97 kW)
Performance
- Maximum speed: knots (84 mph, km/h) at 6,500 ft (2,000 m)
- Service ceiling: 10,000 ft (3,050 m)
- Wing loading: lb/ft² (kg/m²)
- Power/mass: hp/lb (W/kg)
- Endurance: 2½ hours
- Climb to 10,000 ft (3,050 m): 37 min 10 sec
Armament
- One forward firing .303 in (7.7 mm) Vickers machine gun and one .303 in (7.7 mm) Lewis gun in observer's cockpit
References
- ^ Mason, Francis K (1992). The British Figher since 1912. Naval Institute Press. ISBN ISBN 1-55750-082-7.
- ^ a b c Green, W; Swanborough, G (1994). The Complete Book of Fighters. Smithmark. ISBN 0-8317-3939-8.
- ^ a b c Bruce, J.M. (1965). Warplanes of the First World War, Fighters Volume One, Great Britain. London: Macdonald.
External links
Virtual air museum
British Aircraft
Directory
Related content
Comparable aircraft
Sopwith 1½ Strutter
Bristol F.2 Fighter
Designation sequence
F.K.6 - F.K.7 - F.K.8 - F.K.9 - F.K.10 - F.K.12
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