British development of helicopter by Westland Aircraft Ltd, from American design; Westland-Sikorsky S-51 is 4-seater general purpose helicopter powered by Alvis Leonides engine.
Helicopter progress at Yeovil
Aeroplane
Aeroplane ; 74 , n 1917
1948
4 pages
Photographs and 3-view drawings
Article (Journal)
English
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Online Contents | 1995
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Engineering Index Backfile | 1945