Supermarine Attacker

The Supermarine Attacker was a British single-seat naval jet fighter built by Supermarine for the Royal Navy's Fleet Air Arm (FAA). It was the FAA's first jet fighter.

Design and development
The Attacker developed from a Royal Air Force (RAF) fighter jet project, under Air Ministry Specification E.10 of 1944 (the E for experimental). The design of the Attacker used the laminar flow straight-wings of the Supermarine Spiteful, a piston-engined fighter intended to replace the Supermarine Spitfire, and what became the Attacker was originally referred to as the "Jet Spiteful". The project was intended to provide an interim fighter for the RAF while another aircraft, the Gloster E.1/44 also using the Nene was developed. An order for three prototypes was placed on 30 August 1944, the second and third of which were to be navalised. An order for a further 24 pre-production aircraft, six for the RAF and the remaining 18 for the Fleet Air Arm was placed on 7 July 1945.

Handling problems with the Spiteful prototype delayed progress on the jet-powered version, leading to the pre-production order of 24 being stopped, although work on the three prototypes continued. The Fleet Air Arm instead bought 18 de Havilland Vampire Mk. 20s to gain experience with jet aircraft. The RAF rejected both designs since they offered no perceptible performance advantage over the contemporary Gloster Meteor and the de Havilland Vampire, the RAF's first two operational jet aircraft. Supermarine offered a navalised version of the project to the Admiralty. The prototype Type 392 serial number TS409 land version was first flown on 27 July 1946, by test pilot Jeffrey Quill.

The Attacker suffered from a number of deficiencies which led to it quickly being superseded; one being that the aircraft retained the Spiteful's tail-wheel undercarriage (due to the extent of the re-tooling that would have been required to alter the Spiteful's wing), rather than a nose-wheel undercarriage, thus making the Attacker more difficult to land on aircraft carriers. This same tail-down attitude meant operating from grass airfields, the jet exhaust would create a long furrow in the ground "three men could lie down in". Also the new wing was apparently aerodynamically inferior to the original Spitfire elliptic one, with lower critical Mach number, leading to someone quipping that "they rather should have left the Spitfire wing on the thing".

The first navalised prototype, Type 398 TS413 flew on 17 June 1947 flown by test pilot Mike Lithgow, three years after the Meteor had made its first flight. Production orders for the FAA were placed in November 1949. The first production aircraft to take to the skies was the F.1 variant in 1950, entering service with the FAA in August 1951 with the first squadron being 800 Naval Air Squadron. The F.1's armament consisted of four 20 mm (.79 in) Hispano Mk. V cannons, with 125 rounds of ammunition per gun. It was powered by a single Rolls-Royce Nene Mk. 101 turbojet engine.

Operational history
The Attacker had a brief career with the Fleet Air Arm, not seeing any action during its time with the FAA and being taken out of first-line service in 1954. It remained in service with the Royal Naval Volunteer Reserve (RNVR) for a little while longer, being taken out of service in early 1957. The Attacker was replaced in the front line squadrons by the later and more capable Hawker Sea Hawk and de Havilland Sea Venom. Between 1952 and 1953, 36 Attackers also served in the Pakistan Air Force (PAF) until the type was completely retired in the 1960s.

Variants
Two more variants of the Supermarine Attacker were built for the FAA. The FB 1 was a fighter-bomber which differed little from the F 1 except that it was expected to operate as a ground attack aircraft. The third, and last, variant of the Attacker was the FB 2 which introduced a new Rolls-Royce Nene engine and modifications to its structure. The Supermarine Attacker now had eight underwing pylons which could carry two 1,000 lb (454 kg) bombs or eight unguided rockets.


 * Type 392
 * Prototype land version to specification E.10/44, ordered as one of three prototypes on 30 August 1944, one built and first flown 27 July 1946.


 * Type 398
 * Prototype navalised variant ordered on 30 August 1944, one built and first flown 17 June 1947.


 * Type 513
 * Prototype second naval prototype to specification E.1/45 ordered on 30 August 1943, one built and first flown 24 January 1950.


 * Type 398 Attacker F.1
 * Production Nene 3 powered variant, 63 ordered on 29 October 1948 and built at South Marston, 50 built as F1 as two were cancelled and the last 11 built as FB.1s. First flight of production F.1 was on 4 April 1950.


 * Attacker FB.1
 * Last 11 production F 1s were built as FB 1s plus an additional aircraft ordered on 27 March 1951 to replace one aircraft destroyed on a production test flight. The FB1 had been modified from the original design to allow it to carry rocket projectiles or bombs under the wings.


 * Attacker FB.2
 * Updated fighter-bomber variant powered by the Nene 102, 24 ordered on 21 November 1950, 30 ordered on 16 February 1951 and a further 30 ordered on 7 September 1951, all 84 built at South Marston.


 * Type 538 Attacker
 * Land based Nene 4 powered variant for the Pakistan Air Force, 36 built with the first delivered in 1953.

Operators

 * Pakistan Air Force, 36 aircraft.
 * No. 11 Arrows squadron
 * Fleet Air Arm, 146 aircraft.
 * 736 Naval Air Squadron (Training Squadron)
 * 800 Naval Air Squadron
 * 803 Naval Air Squadron
 * 890 Naval Air Squadron
 * Royal Naval Volunteer Reserve
 * 1831 Naval Air Squadron
 * 1832 Naval Air Squadron
 * 1833 Naval Air Squadron
 * 1834 Naval Air Squadron
 * 1835 Naval Air Squadron
 * 1834 Naval Air Squadron
 * 1835 Naval Air Squadron

Accidents and incidents

 * On 23 May 1950, Vickers test pilot Les Colquhoun was flying the first production Attacker F.1 WA469; he was testing the effectiveness of the air brakes. On the third of two dives, the outer portion of the starboard wing folded up and the ailerons became locked. Colquhoun decided not to eject and managed to do a high-speed landing at Chilbolton, in the course of which he used all but the last 100 yards (90m) of the runway and burst a tyre. He had saved the aircraft so the cause of the incident could be discovered and was awarded the George Medal for his efforts.

A second accident on 10 November 1955, in Attacker FB.2 'WP281', claimed the life of the chief Flying Instructor, Lieutenant Commander Charles James Lavender DSC [see RNAS Stretton]
 * On 5 February 1953, Attacker FB.1 WA535 from RNAS Stretton crashed near Winwick, Cheshire, killing the pilot.

Survivors

 * Following its retirement from service in 1956, Attacker Serial number WA473 was placed on display on the gate at AHU Abbotsinch, in 1961 it was moved to the Fleet Air Arm Museum in Somerset, UK.