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Westland-Sikorsky WS-51 Mk.1A Civil transport helicopter powered by a 520 hp (388 kW) Alvis Leonides 521/1 radial piston engine, 36 built. Westland-Sikorsky WS-51 Mk.1B Civil transport helicopter powered by a 450 hp (336 kW) Pratt & Whitney R-985 Wasp Junior B4 radial piston engine, 15 built.
The Sikorsky H-5 (initially designated R-5 [a] and also known as S-48, S-51 and by company designation VS-327 [1]) is a helicopter built by Sikorsky Aircraft Corporation.. It was used by the United States Air Force, and its predecessor, the United States Army Air Forces, as well as the United States Navy and United States Coast Guard (with the designations HO2S and HO3S).
The split, which became known as the Westland affair, was over whether to push the company into a European deal or accept the US company's offer. Eventually, the link with Sikorsky was accepted. [4] This saw both Sikorsky and Fiat acquire minority shareholdings in Westland. [5] In 1988 GKN bought a 22% share of Westland from Hanson plc and Fiat ...
Westland Wessex a turbine-powered version of the Sikorsky S-58; Westland Whirlwind a license-built version of the U.S. Sikorsky S-55/H-19 Chickasaw with British engines. Westland Widgeon a private venture by Westland Aircraft as an improvement on the Westland WS-51 Dragonfly; Westland Westminster (1958) – heavy lift helicopter, private ...
BEA's S-51, G-AJHW, seen at an unspecified location in 1953 Hay Mills Rotor Station (or Rotorstation ) was a helidrome in the Hay Mills district of southern Birmingham , England, which was operational from 1951 to 1954.
In 1950, Westland Aircraft, already building the American Sikorsky S-51 under licence as the Westland Dragonfly, purchased the rights to manufacture and sell Sikorsky's larger Sikorsky S-55 helicopter. While a Sikorsky-built pattern aircraft was flown by Westland in June 1951, converting the design to meet British standards (including the ...
Three Dragonfly Series 1As were converted to WS-51 Series 2 Widgeon specifications and the first one flew on 23 August 1955. One of these conversions, registration G-ANLW, was the first helicopter to land at the London Heliport on 8 April 1959, and later appeared in the 1971 film, When Eight Bells Toll .
The first production use was the Percival Prince, which flew in July 1948 and the Westland Sikorsky S-51 and Westland WS-51 Dragonfly helicopters. From 1959 the stroke was increased to 4.8 inches for the Series 530 (mainly the Mk. 531 for Twin Pioneers ) rated at 640 hp.