The F.K.9 two-seat fighter-reconnaissance quadruplane
was built by Sir W G Armstrong Whitworth & Co
Ltd as a private venture, and was initially flown in the
summer of 1916. Initial trials dictated a number of modifications,
including new wings with enlarged ailerons,
an enlarged fin, a redesigned engine cowling and increased
undercarriage track. In this form, powered by a
110hp Clerget 9Z rotary engine, and with a designated
armament of one fixed 7.7mm Vickers gun
and one free 7.7mm Lewis gun, the F.K.9
was officially tested in November-December 1916 at the
Central Flying School. A production contract for 50
examples of an improved version, the F.K.10, was
| Take-off weight||924 kg||2037 lb|
| Empty weight||556 kg||1226 lb|
| Wingspan||8.46 m||28 ft 9 in|
| Length||7.87 m||26 ft 10 in|
| Height||3.45 m||11 ft 4 in|
| Wing area||32.98 m2||354.99 sq ft|
| Max. speed||151 km/h||94 mph|
A production contract for 50 examples of an improved version, the F.K.10, was awarded.
Armstrong Whitworth F.K.9
It was "Little Ack", aka F.K.3.
My grandfather was a pilot in the RFC and RAF 1917-1918.
In his logbook he has the A.W. small. Which of the Armstrong
Whitford models is the small?
Do you have any comments about this aircraft ?