Reprint of paper published in supplement of Helicopter Assn -- J v 3 n 2, indexed in Engineering Index 1949 p 540 from abstracts in Aeroplane Oct 21 1949 and Flight Oct 6 1949. (See also - n 4 Mar 1950 p 16-23, n 5 Apr 1950 p 15-6, 18-9, n 6 May 1950 p 13-9, n 7 June 1950 p 17-8, 21-2, (discussion) n 8 July p 13-6, 19-20; v 17 n 2 Jan 1950 p 6-11, 12-2, n 3 Feb 1950 p 15-8, 22-3)
Some economics of helicopter -- Present and future
Am Helicopter
American Helicopter ; 18 , n 8
1950
2 pages
Aufsatz (Zeitschrift)
Englisch
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