Supermarine Swift

Supermarine

Industry	Aerospace
Founded	1913 in United Kingdom
Headquarters	United Kingdom
Products	Aircraft, including the Supermarine Swift

Template:Infobox aircraft

The Supermarine Swift was a British single-seat jet fighter employed by the Royal Air Force (RAF), designed and produced by Supermarine during the late 1940s and early 1950s. Incorporating several innovations of the jet era, including a swept wing, the Swift achieved a notable milestone on 26 September 1953 when a Swift F.4, flown by Commander Mike Lithgow, set a new world absolute speed record at 737.7 mph (1,187 km/h).

Following an extended development phase, the Swift was introduced as an interceptor aircraft into RAF service in 1954. Nevertheless, a series of accidents led to its temporary grounding and ultimately resulted in a relatively short operational tenure. The aircraft’s difficulties sparked a public controversy that damaged the reputations of the British government, the RAF, and the domestic aerospace sector.

Consequently, the Hawker Hunter, which exhibited fewer issues, took over many of the roles initially planned for the Swift, and production numbers were halved from original expectations. Although a subsequent photo reconnaissance variant addressed some initial defects, it arrived too late to restore confidence in the model. An advanced derivative intended to reach transonic velocities—the Supermarine 545—was also under development in the early 1950s but was cancelled in 1955 primarily due to the Swift’s unsatisfactory performance.

Background

At the end of the Second World War in 1945, Britain’s Labour government led by Clement Attlee assumed office. This administration initially believed that no major war would arise for at least ten years, resulting in a policy to defer new aircraft development or acquisition until around 1957. Consequently, most of the fighter-sized aircraft specifications issued by the Air Ministry during the late 1940s were aimed primarily at research rather than production, with exceptions like what would become the Hawker Sea Hawk for the Royal Navy.

The Swift’s lineage can be traced to experimental fighter prototypes developed under these conditions. Specifically, Supermarine produced several prototypes under Specification E.41/46, which called for an experimental fighter featuring a swept wing. The initial prototype was designated Type 510, heavily based on the straight-winged Supermarine Attacker, which served with the Fleet Air Arm. The key distinction was its adoption of swept wings. The Type 510 conducted its first flight in 1948, one year after the navalised Attacker prototype had flown, marking it as Britain’s first aircraft to fly with both swept wings and a swept tailplane. During Fleet Air Arm trials, it became the first swept-wing aircraft to perform takeoff and landing operations on an aircraft carrier.

In response to Cold War tensions emerging in the late 1940s, the RAF recognised an urgent requirement for fighters incorporating features such as swept wings and accepted interim solutions while more advanced designs were developed. The outbreak of the Korean War in 1950 accelerated this urgency, prompting numerous orders from Britain’s armed forces. That year, both Hawker and Supermarine received contracts for proposed fighters directly from their design concepts. Supermarine’s design was assigned as Type 541, essentially an evolution of its earlier Type 510 experimental craft.

Initially, an order for one hundred units was placed in 1950 as a contingency should Hawker fail to deliver a suitable aircraft. By early 1951, this order increased to one hundred fifty units as hopes grew that it might enter service ahead of Hawker’s Hunter; however, development delays affected both models.

File:Supermarine Swift FR.5 XD905 V-A Farnborough 10.09.55 edited-2.jpg

Swift FR.5 touching down at the Farnborough air show in September 1955

The Type 541 replaced its predecessor's Rolls-Royce Nene centrifugal-flow turbojet with an axial-flow Rolls-Royce AJ.65 engine—the basis for what became known as the Rolls-Royce Avon series. Despite this engine change, the fuselage cross-section originally designed for the broader Nene engine was not redesigned for the narrower AJ.65/Avon engines, resulting in a somewhat bulky appearance. Additionally, this model featured a tricycle landing gear configuration. Two prototypes of Type 541 were constructed; the first took flight on August 1, 1951, followed by its second prototype in the subsequent year.

Into production

The Swift's production was classified as a "super-priority" task under a directive established by Sir Winston Churchill after he resumed the role of Britain's prime minister in 1951. This policy aimed to accelerate projects deemed crucial for national defense. Manufacturing began before modifications, informed by prototype flight feedback, could be fully integrated: "excessive demands were placed within a limited timeframe, resulting in production models rolling off the line prior to comprehensive redesigns."

The initial production model was the fighter known as the Swift F Mk 1, with a total of 18 units constructed. It featured a single Avon 109 engine delivering 7,500 lbf (33.4 kN) of thrust and was armed with two 30 mm ADEN cannons. The first flight of this production-standard Swift F 1 occurred on 25 August 1952. Peter Thorne, appointed senior RAF test pilot for the Swift in 1954, eventually questioned the aircraft’s operational suitability. Thorne and other pilots reported the Swift exhibited unusual flight characteristics and was plagued by engine reliability issues.

File:Supermarine Swift F.1 WK195 V-A BLA 13.9.53 edited-2.jpg

Swift.F.1 test aircraft operated by Vickers-Armstrong in 1953

Following this, the Swift F Mk 2 was introduced, with 16 examples produced. This version closely resembled the F 1 but incorporated two additional ADEN cannons and featured a wing leading edge redesigned from straight to compound sweep. However, integrating the extra armament led to complications; modifications to support the increased ammunition load adversely affected handling, and it became apparent that enhanced engine thrust was necessary. A series of further adjustments were implemented to address these issues.

The third variant, the F Mk 3, saw production of 25 aircraft powered by an Avon 114 engine equipped with reheat. This model never entered active RAF service and was instead utilized primarily as a training airframe. Subsequently, the F Mk.4 was developed, introducing a variable incidence tailplane designed to remedy the Swift’s handling deficiencies. While this adjustment successfully improved control, it was discovered that reheat could not be reliably ignited at high altitudes, compounding the aircraft’s existing challenges.

Next came the FR Mk 5, which featured an extended nose section to house multiple cameras for reconnaissance missions alongside other structural changes. The FR 5 returned to the twin ADEN cannon configuration seen in the F 1. First flown in 1955, it entered operational service the following year, focusing on low-level reconnaissance where high-altitude reheat issues were less critical.

Two additional variants were developed thereafter. The PR Mk 6 served as an unarmed photographic reconnaissance aircraft but had limited operational use due to persistent reheat difficulties. The final version, the F Mk 7, was notable for being the first Swift equipped with guided missiles—the Fairey Fireflash air-to-air missile—and powered by an updated Avon engine model. Only fourteen F Mk 7s were produced; none saw frontline RAF service and were instead allocated to guided-missile testing alongside prototype missiles.

Proposed derivative

Main article: Supermarine 545

In 1953, responding to the RAF's increasing interest in developing transonic aircraft as an interim solution pending the arrival of next-generation supersonic fighters, both Supermarine and Hawker submitted derivative designs based on their Swift and Hunter models respectively. At this stage, the Swift's deficiencies had not yet become evident, which may have contributed to Supermarine securing RAF approval for its design, known as the Type 545, over the competing Hawker P.1083. The Type 545 was developed to meet the criteria outlined in Specification F.105D. It was intended to reach speeds up to Mach 1.3, powered by an Avon engine, promising better performance than the P.1083. While reminiscent of the Swift in appearance, the Type 545 was a complete redesign featuring an area-ruled fuselage and modified wings. However, in 1955, development was halted partly due to the significant challenges encountered with the Swift.

Operational history

File:Swift FR5s 2 Sqn RAF in flight 1956.jpg

Formation flight of six Swifts, 1956

File:Supermarine Swift FR.5 WK281 79.S ABIN 15.06.68.jpg

Swift FR.5 WK281 displaying No. 79 Squadron RAF insignia

The Swift F1 entered RAF service in February 1954, with No. 56 Squadron becoming its initial operator. This marked the RAF's first introduction of a swept-wing aircraft. The Swift F2 was also introduced during that month. Wood characterizes the aircraft’s deployment as "hasty," with its adoption soon demonstrating itself as a "complete failure." Early in its operational life, the Swift experienced several accidents involving both F1 and F2 variants, including at least one fatal incident. Consequently, in August 1954, the Swift F1 was grounded; shortly thereafter, the F2—which had effectively replaced the F1—was also withdrawn from service for similar safety concerns.

The subsequent Swift F3 and F4 models offered enhanced performance compared to earlier versions. The F4 became the final fighter variant accepted by the RAF for interceptor duties. All fighter versions of the Swift were eventually retired after brief service periods and replaced by the more capable Hawker Hunter. Despite its own challenges, the Hunter rapidly established itself as a successful combat aircraft. By late 1954, awareness of the Swift's problems had become widespread, with national media reporting on its likely cancellation. In Parliament, Under-Secretary of State for Air Sir George Ward commented on the aircraft’s difficulties: "Aerodynamic challenges have been encountered, and it is uncertain whether they can be resolved in the version under development."

By early February 1955, rumors circulated that the Swift had failed its final assessment by the RAF Central Fighter Establishment, suggesting its future roles might be limited to aerial reconnaissance or ground attack. On March 2, 1955, Minister of Supply Selwyn Lloyd confirmed that £20 million had been expended on Swift development before fighter variants were discontinued. According to Wood, by this time the Swift had become a national embarrassment, damaging reputations not only of the aircraft itself but also of both the RAF and British aerospace industry; public and governmental confidence in other aviation projects diminished significantly.

The FR.5 was the final Swift variant to enter RAF service and was eventually superseded by the Hunter FR.10; all FR.5s left RAF service by 1961. This variant was regarded as suitable for its intended role and operated with two squadrons stationed within RAF Germany. Although never deployed in combat by the RAF, the Swift set several speed records during its operational lifetime. On September 26, 1953, an F4 (WK198) piloted by Commander Mike Lithgow established a new world absolute speed record at 737.7 mph (1,187 km/h),Template:Fix/category though this record was surpassed eight days later by the Douglas Skyray, a fighter from the United States Navy (USN). The Swift holds distinction as being the last British production aircraft to hold this record (the experimental Fairey Delta 2 being an exception). Under two hundred Swifts were manufactured from an original order for nearly five hundred units. Several airframes were transported to Australia for use during Operation Buffalo in 1956 and positioned at various distances from atomic detonations.

Although its final variant addressed many earlier issues, further continuation of the programme was deemed unnecessary due to satisfactory Hunter performance fulfilling equivalent roles.

Variants

File:Mlithgow airspeedrecord.jpg

Certificate for the World Air Speed Record achieved by Swift WK198, flown by Mike Lithgow.

Type 510

This prototype evolved from the Vickers Supermarine Attacker, retaining a tailwheel undercarriage but incorporating swept wings and tail surfaces.

Type 517

Prototype equipped with a tailplane featuring variable incidence.

Type 535

Prototype that introduced a nosewheel undercarriage configuration.

Swift F.Mk 1

A single-seat fighter powered by a Rolls-Royce Avon 109 turbojet engine, armed with two 30-mm ADEN cannons, and fitted with a fixed variable-incidence tailplane.

Swift F.Mk 2

Single-seat fighter variant powered by a Rolls-Royce Avon 109 turbojet engine and armed with four 30-mm ADEN cannons.

Swift F.Mk 3

Single-seat fighter model with extended leading edges at the wingtips, powered by a Rolls-Royce Avon 114 afterburning turbojet engine, and equipped with four 30-mm ADEN cannons.

Swift F.Mk 4

This single-seat fighter included a variable-incidence tailplane, an increased tailfin height by one foot, was powered by a Rolls-Royce Avon 114 afterburning turbojet engine, and armed with four 30-mm ADEN cannons.

Swift FR.Mk 5

A single-seat tactical reconnaissance aircraft featuring an elongated nose to house three cameras, a frameless cockpit canopy, powered by a Rolls-Royce Avon 114 afterburning turbojet engine, and armed with two 30-mm ADEN cannons.

Swift PR.Mk 6

An unarmed reconnaissance version proposed but only partially constructed before cancellation.

Swift F.Mk 7

A single-seat fighter fitted with an extended nose to accommodate radar equipment, powered by a Rolls-Royce Avon 114 afterburning turbojet engine, armed with four Fairey Fireflash air-to-air missiles alongside four 30-mm ADEN cannons.

Operators

Template:UK

• Royal Air Force
  • No. 2 Squadron RAF operated the FR.5 variant.
  • No. 4 Squadron RAF also flew the FR.5 variant.
  • No. 56 Squadron RAF utilized the F.1 and F.2 variants.
  • No. 79 Squadron RAF operated the FR.5 variant.

Aircraft on display

File:WK277 (15410592478).jpg

A preserved Swift FR.5 exhibited at the Newark Air Museum

• VV106 (Supermarine Type 517) is held in storage at the Fleet Air Arm Museum, Yeovilton, England.
• WK198 (F.4 prototype fuselage only), once holder of the World Air Speed record, is exhibited at Brooklands Museum, Surrey. Initially preserved at the North East Aircraft Museum, Sunderland, it was moved to RAF Millom Museum in Cumbria on 2 April 2008. Following that museum’s closure in September 2010, WK198 was transferred to Brooklands on 3 February 2011.
• WK275 (F.4) underwent a four-year restoration to exhibition condition by Jet Art Aviation and is currently on loan to the Vulcan To The Sky Trust. This aircraft represents the definitive fighter version featuring a slab tail.
• WK277 (FR.5) is displayed at the Newark Air Museum, Newark, England.
• WK281 (FR.5) can be seen at the Tangmere Military Aviation Museum, Tangmere, England.
• G-SWIF (F.7, formerly XF114) is kept in storage by Solent Sky, Southampton, England.

Specifications (Supermarine Swift FR Mk.5)

File:Supermarine Swift.svg

Three-view illustration of the Supermarine Swift

File:Supermarine Swift F4 (WK198) (6905175839).jpg

Fuselage of WK198 exhibited at the Brooklands Museum

Notable appearances in media

Main article: Supermarine Swift in fiction

See also

Bibliography

• Andrews, C. F. and E. B. Morgan. Supermarine Aircraft since 1914. London: Putnam, 1987, 2nd edition. ISBN 0-85177-800-3.
• Buttler, Tony. X-Planes of Europe II: Military Prototype Aircraft from the Golden Age 1946–1974. Manchester: Hikoki Publications, 2015. ISBN 978-1-90210-948-0.
• Winchester, Jim. The World's Worst Aircraft: From Pioneering Failures to Multimillion Dollar Disasters. London: Amber Books, 2005. ISBN 1-904687-34-2.
• Wood, Derek. Project Cancelled. Macdonald and Jane's Publishers, 1975. ISBN 0-356-08109-5.

Further reading

• Birtles, Philip. Supermarine Attacker, Swift and Scimitar (Postwar Military Aircraft 7). London: Ian Allan, 1992. ISBN 0-7110-2034-5.
• Curry, Alan and Frank Goodridge. "The Rise and Fall of the Swift." FlyPast, Key Publications, May and July 1987.
• Taylor, John W.R. "Supermarine Swift." In Combat Aircraft of the World from 1909 to the present. New York: G.P. Putnam's Sons, 1969. ISBN 0-425-03633-2.
• Walpole, Nigel. Swift Justice: The Full Story of the Supermarine Swift. Pen and Sword Books Ltd., 2004. ISBN 1-84415-070-4.

External links

• Swift at Thunder and Lightnings
• Photograph of a Swift F.Mk.1
• Image of an early Swift
• Photo of the Supermarine 510 VV106