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The Sikorsky S-51 (USAF designation H-5, US Navy designation HO3S-1) was an American helicopter produced in the USA from 1946 until 1951. The Sikorsky S-51 was powered by a Pratt and Whitney R-985 engine providing a top speed of 165 kmh.
 Research Sikorsky S-51
The Westland Sikorsky S-51 Dragonfly was a British-built version of the Sikorsky S-51 four-seater single-rotor helicopter first licensed in 1947. The Westland Sikorsky S-51 was powered by an Alvis Leonides 521/1 radial engine providing a top speed of 141 kmh and a range of 480 km. Various military and civilian variations were produced with slightly different characteristics including the Westland Sikorsky Dragonfly HR Mk 1 Naval helicopter with an Alvis Leonides 50 engine and the Westland Sikorsky HC Mk 2 casualty evacuation helicopter with an Alvis Leonides 24 engine.
Research Westland Sikorsky S-51
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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