Armstrong Whitworth Siskin IIIA
1925
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Armstrong Whitworth Siskin IIIA

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 ring.

Armstrong Whitworth Siskin IIIA


Specification 
 MODELSiskin IIIA
 ENGINE1 x Armstrong Siddeley Jaguar IV, 313/336kW
 WEIGHTS
    Take-off weight1366 kg3012 lb
    Empty weight935 kg2061 lb
 DIMENSIONS
    Wingspan10.11 m33 ft 2 in
    Length7.72 m25 ft 4 in
    Height3.10 m10 ft 2 in
    Wing area27.22 m2292.99 sq ft
 PERFORMANCE
    Max. speed251 km/h156 mph
    Ceiling8230 m27000 ft
 ARMAMENT2 x 7.7mm machine-guns, 4 x 9kg bombs

3-View 
Armstrong Whitworth Siskin IIIAA three-view drawing (1657 x 1267)

Comments
Roger Knights, 30.09.2017

I am currently building a 1/4 scale Siskin IIIa. This will be a highly detailed flying model and will take another two years to complete. Can anyone with knowledge of the Siskin help me out by confirming that the aircraft only had cabane strut cross bracing to the rear struts? This would appear to be the case from photographic records I have, but it is unusual so I thought I'd check. Really appreciate it.

Barry, 17.08.2012

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.

gangya, 20.06.2011

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.

, 20.06.2011

Armstrong Whitworth Siskin IIIA
1925

Ian White, 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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