Siskin (Total: 22, Canadian: 15, Group 0)
Armstrong Whitworth Siskin

Armstrong Whitworth Siskin Mk. IIIA, RCAF (Serial No. 21), later (Serial No. 302), with F/L Beamish, No. 1 Squadron
The Armstrong Whitworth Siskin was a biplane single-seat fighter aircraft developed and produced by the British aircraft manufacturer Armstrong Whitworth Aircraft. It was also the first all-metal fighter to be operated by the Royal Air Force (RAF), as well as being one of the first new fighters to enter service following the end of the First World War.
Development of the Siskin was heavily influenced by RAF Specification Type I, including its initial use of the ABC Dragonfly radial engine. Making its first flight in May 1919, the Siskin possessed good qualities in spite of the Dragonfly's poor performance. In the following year, the much better Armstrong Siddeley Jaguar was installed and flight with this powerplant was made on 20 March 1921. In response to Air Ministry Specification 14/22, the aircraft was redesigned with an all-metal structure, and orders were placed in 1922.
It was angular in form, with little attention paid to obvious avenues for drag reduction. Perhaps its most distinctive feature was its fixed conventional landing gear, which had relatively lengthy oleo strut shock absorbers carrying the axle, which was in turn connected by radius rods to a pair of V-struts situated behind the axle. Its wings were of unequal span. It was powered by a single ABC Dragonfly radial engine, which was installed on the nose in a streamlined cowling. To regulate the engine's temperature, each individual cylinder had its own cooling channel. Armament consisted of a pair of Vickers machine guns mounted directly in front of the pilot.
Between 1926 and 1939, Canada operated a sizable fleet of Siskins. During 1926, the British Air Ministry had dispatched a pair of Siskin IIIs to Canada, where they underwent testing by the Royal Canadian Air Force (RCAF) under winter flying conditions. The Siskin was considered a modern type at the time of its acquisition by the RCAF, which opted to purchase the Mark IIIA. The Canadian procurement involved both new-built aircraft and second-hand RAF Siskins being supplied to numerous RCAF squadrons.
The Siskin equipped the Fighter Flight at Camp Borden and Trenton. During 1937, the Flight became No. I (Fighter) Squadron, and was transferred from Trenton to Calgary in August 1938. The unit continued to operated the Siskin up until the outbreak of the Second World War, shortly after which the type was rapidly retired and replaced by Hawker Hurricane monoplane fighters. Following the Siskin's withdrawal by the RCAF, the airframes were turned over to various technical establishments for use as instructional airframes. Wikipedia (with revisions)
Siskin 20, IIIA
s/n 20
as/n J8632
c/n AW 208
Armstrong Whitworth
20
After 302 With Fighter Flight of No. 3 (B) Squadron, RCAF Station Trenton, 1935 to 1937. Used by No. 1 (F) Squadron, at RCAF Station Trenton, Ont., 1937 and 1938. Later became instructional airframe A26, possibly used by No. 113 (F) Squadron in this role.
last update: 2024-December-25
1932-June-30 Serial Change Renumbered 2019-08-20
1946-September-05 Struck off Strength 2022-02-07
Siskin 21, IIIA
s/n 21
c/n AW 207
Armstrong Whitworth
21
After 303 Renumbered from 21. With Fighter Flight of No. 3 (B) Squadron, RCAF Station Trenton, 1935 to 1937. Used by No. 1 (F) Squadron, at RCAF Station Trenton, Ont., 1937 and 1938. Damaged in landing accident, date unknown. Used as an instructional airframe throughout WW2, serial A 27. To No. 58 (Royal Canadian Air Cadets) Squadron as training aid.
last update: 2024-December-25
1929-June-30 Serial Change Renumbered as RCAF 303. 2019-08-20
1947-August-18 Struck off Strength 2020-09-19
Siskin 22, IIIA
s/n 22
as/n 304
c/n AW 235
Armstrong Whitworth
22
After 304 Renumbered from 22. With Fighter Flight of No. 3 (B) Squadron, RCAF Station Trenton, 1935 to 1937. Used by No. 1 (F) Squadron, at RCAF Station Trenton, Ont., 1937 and 1938. Became instructional airframe A 28, users included No. 92 (Royal Canadian Air Cadets) Squadron.
last update: 2024-December-25
1932-June-30 Serial Change Renumbered as 304 2019-08-20
1946-July-22 Struck off Strength 2022-02-07
Siskin 23, IIIA
s/n 23
Armstrong Whitworth
23
last update: 2024-December-25
1932-August-10 Struck off Strength 2022-02-07
Siskin 59, IIIA
s/n 59
as/n 305 J7759
c/n AW 397
Armstrong Whitworth
59
After 10 Ex RAF J7759. Initially operated with RAF serial number, for evaluation. Then assigned to Training Squadron, B Flight, Camp Borden, Ontario. The subsequent identity is not clear, may have become 305 or 310?
After 305 Renumbered from 59.
last update: 2024-December-25
1939-January-16 Struck off Strength Struck off, as 305 2019-08-20
Siskin 60, IIIA
s/n 60
c/n AW148
Armstrong Whitworth
60
After 306 Used by No. 113 (F) Squadron in 1939. Became Instructional Airframe A 29.
last update: 2024-December-25
1942-September-29 Struck off Strength Struck off, as 306 2019-08-20
Siskin 61, IIIA
s/n 61
Armstrong Whitworth
61
last update: 2024-December-25
1932-August-10 Struck off Strength Struck off after mid air on 26 July 1932, one fatality, see comments. 2019-08-20
Siskin 62, IIIDC
s/n 62
c/n AW 215
Armstrong Whitworth
62
After 307 Renumbered from 62. Became Instructional Airframe A 11.
last update: 2024-December-25
1940-July-12 Struck off Strength Struck off, after renumbering as 307 2019-08-20
Siskin 63, IIIDC
s/n 63
as/n 308
Armstrong Whitworth
63
Renumbered to 308
last update: 2024-December-25
1937-August-16 Struck off Strength Struck off, after renumbering as 308 2019-08-20
Siskin 210, IIIA
s/n 210
c/n AW 699
Armstrong Whitworth
210
After 309 Renumbered from 210. With Fighter Flight of No. 3 (B) Squadron, RCAF Station Trenton, 1935 to 1937. Used by No. 1 (F) Squadron, at RCAF Station Trenton, Ont., 1937 and 1938. Also with No. 113 (F) Squadron in 1939. Later became Instructional airframe A 30.
last update: 2024-December-25
1931-June-23 Serial Change Renumbered as 309 2019-08-20
1942-September-29 Struck off Strength 2020-09-21
Siskin 301, III / IIIA
s/n 301
Armstrong Whitworth
301
last update: 2024-December-25
1929-June-30 Serial Change Renumbered from RCAF 10. 2019-08-20
1935-March-26 Struck off Strength 2019-08-20
Siskin 303, IIIA
s/n 303
c/n AW 281
Armstrong Whitworth
303
last update: 2024-December-25
1929-June-30 Serial Change renumbered 2019-08-20
1939-December-19 Classified Instructional A 27 2020-06-09
1947-August-18 Struck off Strength 2019-08-20
Siskin 306, IIIA
s/n 306
c/n AW148
Armstrong Whitworth
306
last update: 2024-December-25
1932-June-30 Serial Change Renumbered from RCAF 60 2019-08-20
1939-December-19 Classified Instructional CA A 29 2020-06-11
1942-September-29 Struck off Strength 2019-08-20
Siskin J7758, Mk. III
s/n J7758
c/n 147
Armstrong Whitworth
J 7758
last update: 2025-February-05
1927-September-22 Struck off Strength Struck off after crash 2019-08-20