By comparison with the Siskin III, the Siskin IIIA introduced
a number of major design changes, including
a lengthened fuselage with raised aft decking, greater
gap and less upper wing dihedral, and redesigned vertical
tail surfaces lacking the ventral fin. Retaining the
twin 7.7mm Vickers gun armament, the Siskin
IIIA was powered by the 425hp Jaguar IV or super-
charged Jaguar IVS engine, and the slab-sided fuselage
gave place to a fuselage with rounded sides. The
Siskin IIIA, to Specification 19/23, first flew on 20
October 1925, and was ordered for the RAF in June
1926, 412 being built, including 47 dual-control trainers,
17 of the single-seaters being supplied to the RCAF. Of
the total production, the parent company built 159
(Blackburn building 42, Bristol 85, Gloster 74 and Vickers
52). At least one was completed as the experimental
Siskin IIIB with an uprated engine enclosed by a Townend
| MODEL||Siskin IIIA|
| ENGINE||1 x Armstrong Siddeley Jaguar IV, 313/336kW|
| Take-off weight||1366 kg||3012 lb|
| Empty weight||935 kg||2061 lb|
| Wingspan||10.11 m||33 ft 2 in|
| Length||7.72 m||25 ft 4 in|
| Height||3.10 m||10 ft 2 in|
| Wing area||27.22 m2||292.99 sq ft|
| Max. speed||251 km/h||156 mph|
| Ceiling||8230 m||27000 ft|
| ARMAMENT||2 x 7.7mm machine-guns, 4 x 9kg bombs|
|A three-view drawing (1657 x 1267)|
The Siskin IIIA featured the Jaguar IVS engine, which was the first supercharged engine in service anywhere in the world. Numercally outnumbering the later Bulldog this aircraft ceased being the frontline fighter of the RAF in 1929 and disappeared altogether in the early thirties.
The Siskin remained in front-line RCAF service with No.1 Squadron until June 1939 when they were put into storage at High River. The last was struck off RCAF charge in August 1947.
|, wholesale=gmail.com, 20.06.2011|
Armstrong Whitworth Siskin IIIA
|Ian White, ian.g.white=btinternet.com, 19.08.2010|
The Siskin IIIA entered RAF service with No.111 (Fighter) Squadron at Duxford in September 1926 and was followed by ten others, all UK-based; Nos.1, 17, 19, 25, 29, 32, 41, 43, 54 and 56. The type was retired from front-line RAF service in October 1932.
Following trials with two Siskin IIIs at Camp Borden, Canada, between January and April 1926, the RCAF ordered a mixed batch of twelve Siskins - two Mk.IIIs, two Mk.IIIDCs & eight Mk.IIIAs. They later formed the equipment of the Fighter Flights at Borden and Trenton until 1937, when the Borden Flight became No.1 (Fighter) Squadron, RCAF. The Siskin remained in front-line RCAF service with No.1 Squadron until June 1939 when they were put into storage at High River. The last was struck off RCAF charge in August 1947.
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