Illustrated notes on design and performance of Sikorsky R-4B, 3-bladed rotor cabin helicopter powered by 185-hp 7-cyl Warner Super Scarab R-550-1 radial engine driving both vertical and tail rotors; at RAF instructional school at Andover, five or six hours instruction is considered sufficient to train pilot. (see also Flight v 48 n 1906 July 5 1945 p 10-2)
Helicopter progress
Aeroplane
Aeroplane ; 69 , n 1783
1945
13 pages
Aufsatz (Zeitschrift)
Englisch
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