Potentialities of helicopter for scheduled airline operation with particular reference to London-Paris route; economic problems that face helicopter as it is today and as it will be in future. Before Helicopter Assn Great Britain. (see also Flight v 56 n 2128 Oct 6 1949 p 474-5)
Economics of helicopter
Aeroplane
Aeroplane ; 77 , n 2002
1949
4 pages
Article (Journal)
English
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