|Designer||R. J. Mitchell|
|First flight||24 July 1934|
|Retired||1957 (civilian use)|
|Developed from||Supermarine Scapa|
The Supermarine Stranraer was a 1930s British flying boat designed and built by Supermarine Aviation Works principally for the Royal Air Force. They entered operations in 1937 and many were in service at the outbreak of the Second World War undertaking anti-submarine and convoy escort patrols. They were withdrawn from operational service in March 1941 but continued to serve in a training capacity until October 1942.
Design and development
Designed by R. J. Mitchell as a tender to Air Ministry R.24/31 Specification for a coastal reconnaissance flying boat for the RAF, it was initially turned down but Supermarine proceeded with the type as a private venture first known as the Southampton V. A contract was placed in 1933 for a prototype powered by two 820 horsepower (610 kW) Bristol Pegasus IIIM engines and the type became known as the Stranraer.
The structure was mainly duralumin, with the hull covered with sheet metal and the wings with fabric.
Following the initial flight-test programme, the Stranraer prototype (K3973) on 24 October 1934 was delivered to the RAF. On 29 August 1935, an initial order was placed for 17 aircraft (serial numbers K7287 to K7303) to the Air Ministry Specification 17/35. The production version was fitted with the 920 horsepower (690 kW) Pegasus X and first flew in December 1936, entering service operations on 16 April 1937; the last Stranraer was delivered 3 April 1939. An additional order for six aircraft (K9676 to K9681) was placed in May 1936, but subsequently cancelled. A total of 40 Stranraers were built in Canada by Canadian Vickers Limited; Supermarine and Canadian Vickers being subsidiaries of Vickers-Armstrongs.
In service, only 17 Stranraers were operated by the RAF 1937-1941 primarily by No. 228, No, 209, No. 240 Squadrons along with limited numbers at the No. 4 OTU. Generally, the aircraft was not well-received as its performance was considered marginal.
Due to its less than favourable reception by flight and ground crews, the Stranraer gained a large number of derisive nicknames. It was sometimes referred to as a "whistling shithouse" because the toilet opened out directly to the air and when the seat was lifted, the airflow caused the toilet to whistle. The Stranraer also acquired "Flying Meccano Set," "The Marpole Bridge," "Seymour Seine Net," "Strainer," "Flying Centre Section of the Lion's Gate Bridge" as well as a more genteel variant of its usual nickname, "Whistling Birdcage." 
Royal Canadian Air Force Stranraers were exact equivalents of their RAF counterparts and while they were employed in coastal patrol against submarine threats in a similar role to the British Stranraers, no enemy action was recorded. The Canadian Vickers-built Stranraers served with the RCAF until 1946.
Thirteen examples were sold through Crown Assets (Canadian government) and passed into civilian use after the war, several serving with Queen Charlotte Airlines (QCA) in British Columbia and operated until 1957. A re-engine project by the airline substituted 1,200 horsepower (890 kW) Wright GR-1820-G202GA engines in place of the original Pegasus units.
Queen Charlotte Airlines became at one point the third largest airline in Canada, however it was popularly known as the Queer Collection of Aircraft. With limited money, it flew an eclectic mixture of types that were often the cast-offs of other operators. However, in QCA use, the Stranraer gained a more suitable reputation and was "well liked" by its crews. A total of eight surplus Stranraers were also sold to Aero Transport Ltd. of Tampa, Florida.
- Royal Canadian Air Force - Operational Squadrons of the Home War Establishment (HWE) (Based in Canada)
- Eastern Air Command
- Western Air Command
- No. 4 Squadron RCAF Used Supermarine Stranraer (Jul 39 – Sep 43)
- No. 6 Squadron RCAF Used Supermarine Stranraer (Nov 41 – May 43)
- No. 7 Squadron RCAF Used Supermarine Stranraer (Feb 43 – Mar 44)
- No. 9 Squadron RCAF Used Supermarine Stranraer (Dec 41 – Apr 43)
- No. 13 (OT) Squadron RCAF Used Supermarine Stranraer (Oct 41 – Nov 42)
- No. 120 Squadron RCAF Used Supermarine Stranraer (Nov 41 – Oct 43)
- (OT)-Operational Training;
- Royal Air Force
- Aero Transport Ltd. (United States)
Data from "Database: Supermarine Stranraer." 
- Crew: 6-7
- Length: 54 ft 9 in (16.7 m)
- Wingspan: 85 ft 0 in (25.9 m)
- Height: 21 ft 9 in (6.6 m)
- Wing area: 1,457 ft² (135.4 m²)
- Empty weight: 11,250 lb (5,100 kg)
- Loaded weight: 19,000 lb (8,620 kg)
- Powerplant: 2 × Bristol Pegasus X radial engines, 920 hp (685 kW) each
- Maximum speed: 165 mph (265 km/h) at 6,000 ft (1,830 m)
- Range: 1,000 mi (1,610 km)
- Service ceiling: 18,500 ft (5,640 m)
- Rate of climb: 1,350 ft/min (6.8 m/s)
- Wing loading: 13 lb/ft² (63.7 kg/m²)
- Power/mass: 0.097 hp/lb (159 W/kg)
A single intact Stranraer, 920/CF-BXO, survives in the collection of the Royal Air Force Museum London. This aircraft was built in 1940, one of 40 built by Canadian Vickers. In service with the Royal Canadian Air Force, it flew with several squadrons, on anti-submarine patrols, as a training aircraft and carrying passengers. In 1944, it was disposed of. In civil service, it was flown by Canadian Pacific Airlines until 1947, then Queen Charlotte Airlines, who replaced its original British engines with American Wright 1820s. Queen Charlotte Airlines flew it on passenger flights until 1952, flying from Vancouver along the Pacific coast of British Columbia. It flew with several other private owners until damaged by a ship in 1966. In 1970, it was bought by the RAF Museum and transported to the UK. 
The parts of a second Stranraer, 915/CF-BYJ are owned by the Shearwater Aviation Museum, Halifax, Canada. This aircraft also operated with Queen Charlotte Airlines until it crashed on Christmas Eve 1949 at Belize Inlet, British Columbia. Most of the aircraft was recovered in the 1980s, with the exception of the forward fuselage and cockpit.
- Aircraft of comparable role, configuration and era
- Related lists
- Morgan 2001, pp. 58–59.
- Septer 2001, p. 60.
- Septer 2001, pp. 60–61.
- Septer 2001, pp. 62–63.
- Septer 2001, p. 62.
- Kostenuk and Griffin, 1977, pp. 25-26
- Kostenuk and Griffin, 1977, p. 50
- Kostenuk and Griffin, 1977, pp. 24-25
- Kostenuk and Griffin, 1977, p. 27
- Kostenuk and Griffin, 1977, p. 28
- Kostenuk and Griffin, 1977, p. 31
- Kostenuk and Griffin, 1977, p. 36
- Kostenuk and Griffin, 1977, p. 55
- Bowyer 1991, p. 161.
- Morgan 2001, pp. 54, 56.
- London 2003, p. 176.
- Andrew Simpson (2007). "Individual History: Supermarine Stranraer 920/CF-BX)". Royal Air Force Museum. Retrieved October 30, 2009.
- Andrews, C.F. and E.B. Morgan. Supermarine Aircraft Since 1914. London: Putnam Books Ltd., 2nd revised edition 2003. ISBN 0-85177-800-3.
- Bowyer, Michael J.F. Aircraft for the Few: The RAF's Fighters and Bombers in 1940. Sparkford, Nr. Yeovil, Somerset, UK: Patrick Stephens Ltd., 1991. ISBN 1-85260-040-3.
- Kightly, James and Roger Wallsgrove. Supermarine Walrus & Stranraer. Sandomierz, Poland/Redbourn, UK: Mushroom Model Publications, 2004. ISBN 83-917178-9-5.
- Kostenuk, S. and J. Griffin. RCAF Squadron Histories and Aircraft: 1924–1968. Toronto: Samuel Stevens, Hakkert & Company, 1977. ISBN 0-88866-577-6.
- London, Peter. British Flying Boats. Stroud, Gloucestershire, UK: Sutton Publishing, 2003. ISBN 0-7509-2695-3.
- Morgan, Eric. "Database: Supermarine Stranraer." Aeroplane, Volume 29, no. 4, issue 235, April 2001.
- Septer, Dirk. "Canada's Stranraers." Aeroplane, Volume 29, no. 4, issue 235, April 2001.
- Taylor, John W.R. "Supermarine Stranraer." Combat Aircraft of the World from 1909 to the present. New York: G.P. Putnam's Sons, 1969. ISBN 0-425-03633-2.
- Thetford, Owen. British Naval Aircraft Since 1912, Fourth Edition. London: Putnam, 1978. ISBN 0-370-30021-1.
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