Helicopter and new VTOL aircraft, although differing in appearance, belong to same family; dominant parameter is disk loading, giving 2 types of actuator disk, open disk or rotor and buried disk or fan; noise and vibration criteria; rotor is subject to aerodynamic limitations, which give speed limits for pure rotor and rotor compounded with fixed wing; engine requirements for pure, compound, and convertible helicopters; their characteristics, economics and uses.
Helicopter, first of VTOL aircraft
Roy Aeronautical Soc -- J
Royal Aeronautical Society -- Journal ; 65 , n 612
1961
15 pages
Article (Journal)
English
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