Supermarine Type 525
| Industry | Aerospace |
|---|---|
| Founded | 1913 |
| Headquarters | Southampton , United Kingdom |
Key people | R. J. Mitchell (noted designer) |
| Products | Aircraft |
The Supermarine Type 525 represented a British experimental naval jet fighter from the 1950s era.
Design and development
The Type 525 emerged as an advanced iteration of the Type 508, of which three units had been commissioned from Supermarine in November 1947 under Air Ministry specification N.9/47. The initial Type 508 models served as developmental platforms for a carrier-based interceptor, reconnaissance, and low-altitude nuclear strike aircraft planned to be constructed later according to specification N.113D; this design evolved into the Supermarine Scimitar known as the Type 544, which eventually entered operational service.
The first Type 508, bearing serial number VX133, featured straight wings and a distinctive V-tail (or "butterfly") configuration intended for compatibility with rubber deck landing methods. Its broad, flattened fuselage combined with the V-tail was engineered to ensure sufficient stability and clearance during landings without conventional Landing gear deployment. This aircraft completed its maiden flight on 31 August 1951. The second Type 508, serialled VX136, closely resembled the initial model but was reclassified as the Type 529 and took to the skies for the first time on 29 August 1952.
Constructed alongside its predecessors at Supermarine's Hursley Park experimental division, the third Type 508 VX138 underwent production modifications aligning it more closely with Scimitar specifications and was redesignated as the Type 525. This unit was transported by road to the Aeroplane and Armament Experimental Establishment (A&AEE) located at Boscombe Down, Wiltshire, on 25 April 1954. Its inaugural flight occurred two days later on 27 April 1954, piloted by Supermarine's test pilot M J Lithgow.
Equipped with twin Rolls-Royce Avon turbojet engines, the Type 525 incorporated a taller tricycle landing gear arrangement mounted further outboard on the wings compared to the Type 508. It featured conventional tail and rudder assemblies along with swept wings. The aircraft’s public debut took place at the September 1954 Farnborough Airshow.
Operational history
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In late 1954, the aircraft continued its test flights from its base at Chilbolton airfield, located in Hampshire. Early in 1955, it was transported by road to the Hursley Park facility for fitting with a flap blowing system.[1] This innovation aimed to decrease the safe landing approach velocity, which was particularly beneficial for carrier operations. Additionally, it enabled catapult launches to be executed at lower speeds.[2]
The Type 525's flap blowing system, known as "super-circulation," functioned by directing a slender jet of high-pressure air—sourced from an engine compressor—through a narrow slot positioned along the wing's trailing edge immediately before the flap hinges. Utilizing the Coandă effect, this airflow was deflected over the flaps, enhancing lift and resulting in an 18 mph reduction in approach speed—a significant advantage for carrier-based aircraft.[3]
After being returned to Chilbolton via road transport, the aircraft was flown to the Aeroplane and Armament Experimental Establishment (A&AEE) on 5 July 1955 to undergo additional evaluations. During low-speed handling tests conducted that day at an altitude of 10,000 ft (3,000 m), the aircraft entered a flat spin approximately 20 minutes after takeoff and failed to recover from it. It descended from around 3,000 ft (910 m) near two miles south-southeast of Boscombe Down, ultimately crashing and catching fire. The pilot, Lieutenant Commander T.A. Rickell, had ejected shortly before impact but succumbed to injuries sustained in the incident.[1]
The inaugural Type 544 Scimitar prototype integrated lessons learned from the Type 525 and achieved its maiden flight on 19 January 1956.[1]
Operators
- Supermarine (Vickers-Armstrong)
- Aeroplane and Armament Experimental Establishment
Specifications (Type 525)
Notes
- ↑ 1.0 1.1 1.2 Sturtivant (2004), p. 572.
- ↑ Thetford (1977), p. 338.
- ↑ Andrews & Morgan (1987), pp. 298–301.
Bibliography
- Andrews, C. F.; Morgan, E. B. (1987). Supermarine Aircraft from 1914 Onwards (2nd ed.). London: Putnam. ISBN 0-85177-800-3.
- Buttler, Tony (2017). British Secret Projects: Jet Fighters Post-1950 (2nd ed.). Manchester: Crecy Publishing. ISBN 978-1-910-80905-1.
- Buttler, Tony (2001). "Type Analysis: The Supermarine Scimitar". International Air Power Review. 2 (Autumn/Fall). Connecticut, USA: AIRtime Publishing: 158–173. ISBN 1-880588-34-X. ISSN 1473-9917.
- Buttler, Tony (2015). X-Planes of Europe. Military Prototype Aircraft of the Golden Age 1946–1974. Vol. II. Manchester, UK: Hikoki Publications. ISBN 978-1-90210-948-0.
- Mason, Francis K. (1992). A History of British Fighters since 1912. Annapolis, Maryland, USA: Naval Institute Press. ISBN 1-55750-082-7.
- Sturtivant, Ray (2004). Fleet Air Arm Fixed-Wing Aircraft from 1946 Onwards. Air-Britain (Historians) Ltd. ISBN 0-85130-283-1.
- Thetford, Owen (1977). A History of British Naval Aircraft since 1912. Putnam and Company Ltd. ISBN 0-370-30021-1.
External links
