| When, in January 1917, Capt F M Green became chief
aeronautical engineer of the Siddeley-Deasy Motor Car
Company, he began the design of a single-seat fighter,
the S.R.2. A compact single-bay sesquiplane predominantly
of wooden construction with fabric skinning, the
S.R.2 was powered by a 320hp A.B.C. Dragonfly nine-cylinder
radial engine. Armament comprised two synchronised
7.7mm machine guns. A contract
for six prototypes was reduced to three in mid 1918, the
first of these flying in April 1919, by which time the
fighter had been officially named Siskin. The first prototype Siskin was subsequently re-engined with an Armstrong
Siddeley Jaguar, development in this form continuing
after Siddeley Deasy acquired in 1921 the name
and goodwill of Sir W G Armstrong Whitworth & Co
Ltd, and the Armstrong Whitworth Siskin II
emerging in 1922.
 | A three-view drawing (1280 x 960) |
WEIGHTS |
Take-off weight | 989 kg | 2180 lb |
Empty weight | 664 kg | 1464 lb |
DIMENSIONS |
Wingspan | 8.38 m | 28 ft 6 in |
Length | 6.48 m | 21 ft 3 in |
Height | 2.97 m | 10 ft 9 in |
Wing area | 22.95 m2 | 247.03 sq ft |
PERFORMANCE |
Max. speed | 233 km/h | 145 mph |
Ceiling | 7255 m | 23800 ft |
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|  All the World's Rotorcraft |