Armstrong Whitworth F.K.10

The Armstrong Whitworth F.K.10 was a British two-seat quadruplane (i.e., four wing) fighter aircraft built by Armstrong Whitworth during the First World War. While it was ordered in small numbers for the Royal Flying Corps and Royal Naval Air Service, it was not used operationally. It is one of the few quadruplane aircraft to reach production.

Development

The F.K.10 was designed in 1916 by Frederick Koolhoven, the chief designer of Armstrong Whitworth Aircraft as a single-engine two-seat fighter. Koolhoven chose the novel quadruplane 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 was built and first flown in the summer of 1916, powered by a 110&nbsp;hp (80&nbsp;kW) Clerget 9Z engine. It had a shallow fuselage, with the wings joined by plank-like interplane struts, 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.<ref...
Read More