Problem involved in design of shaft driven helicopters; scale effects which govern rotors and transmission systems; best rotor configuration; special takeoff technique developed by Bristol known as "backward takeoff technique", consists of climbing away backwards from takeoff point, so that landing area is kept in front of machine.
Heavy-lift helicopters
Am Helicopter
American Helicopter ; 46 , n 4
1957
4 pages
Article (Journal)
English
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