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Aviation History
1955
1955 - 1268.PDF
PLIGHT, 2 September 1955 VICKERS-SUPERMARINE Hunley Park, Winchester, Hants. Telephone: Chandlers Ford 2251 N.113 and Type 525 Now in full production for the Fleet Air Arm, and primarily intended as a supersonic fighter, the N.113 will also be capable of carrying an atomic bomb. It is powered with two Rolls-Royce Avon turbojets, and has been developed from two experi- mental machines, the Type 508 and Type 525. The 508 had a "butterfly" tail and a straight wing. On the Type 525, the wings were swept back and the tail was a conventional assembly with swept surfaces. It was recently disclosed that the Type 525 had been fitted with a "supercirculation" system, the first application of its kind to a British military aircraft. In this system compressor-bled air is blown over the upper surface of the flaps when these are extended, thus preventing the break-away of the airflow which normally occurs over the flaps during a landing approach, causing loss of lift. The extra lift gained by the system not only reduces landing speed, but offers other advantages. For instance, it provides a flatter approach attitude, and consequently a better view for the pilot. Additionally, it allows him to vary the total lift of the wing by adjusting the engine power-setting. While armament of the N.113 may not be disclosed, provision was made on its precursors for four 30 mm guns in the bottom of the power plant housings. During the course of development the wing was modified to have a "saw-tooth" leading edge, as on the Swift. Swift In its F.R.5 form the Swift is now in full production for the RAJ7, in Supermarine factories at Eastleigh, Itchen and South Marston. It is equipped for fighter/reconnaissance duties, and has three cameras mounted obliquely in the very long re-designed nose. Built-in armament is two 30 mm Aden guns, and provision is made for "a variety of externally- mounted weapons." Although these may not at present be specified, it is not inappropriate to recall that at the previous S.B.A.C display, a Swift F.4 was exhibited with a 1,000-lb streamlined bomb under one wing, and eight 60-lb rockets under the other. It was noted that a variable-incidence tailplane was fitted, and that internal fuel capacity was no less than 778 gallons—500 gallons in the rear fuselage, 98 gallons behind the cockpit, and 90 gallons in each wing root. Furthermore, the F.R.5 is known to be able to carry a 220-gallon jettisonable tank beneath the fuselage. The Rolls-Royce Avon engine of me F.R.5 is fitted with an after- burner, which will provide fast acceleration after, or during, reconnaissance of dangerous areas. The production version of the F.R.5 differs from earlier Swifts in having a clear view canopy, and a "saw-tooth" leading-edge. Power plant ... Two Rolls-Royce Avon No data available Above, Type 525 Below, Swift F.R.5 Power plant ...Span Length Rolls-Royce Avon32ft 4in 42ft 3in
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