Supplemental booklet contains design for jet powered rotor helicopter with manual or automatic blade pitch angle changing means, jet steering and provision for additional forward thrust; original booklet (1947) contains design for mechanical powered rotor helicopter; detailed descriptions given. Eng Soc Lib, NY. ($2.50)
Designs for helicopters, supplement
Designs for Helicopters, Supplement
1950
10 pages
Diagrs
Aufsatz/Kapitel (Buch)
Englisch
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