The Westland WS-51 Dragonfly helicopter was built by Westland Aircraft and is an Anglicised licence-built version of the American Sikorsky S-51. == Design and development == On 19 January 1947 an agreement was signed between Westland Aircraft and Sikorsky to allow a British version of the S-51 to be manufactured under licence in the United Kingdom.
The Westland WS-51 Dragonfly helicopter was built by Westland Aircraft and is an Anglicised licence-built version of the American Sikorsky S-51. == Design and development == On 19 January 1947 an agreement was signed between Westland Aircraft and Sikorsky to allow a British version of the S-51 to be manufactured under licence in the United Kingdom.
Source: Wikipedia "Westland WS-51 Dragonfly" · CC BY-SA 4.0
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