Expedient types include one central rotor, two superimposed rotors, two adjacent rotors, two rotors in tandem arrangement; drive and power transmission; steering mechanism and stability; applications and trends in development.
Design, performance characteristics and uses of helicopters
Hubschrauber
Verein Deutscher Ingenieure -- VDI Zeitschrift ; 95 , n 36
1953
7 pages
Illustrations
Article (Journal)
German
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