History of development of rotary wing aircraft; advantages and limitations; helicopters are classified based on external configuration. (See also - n 1839 Aug 23 1946 p 217-21)
Helicopters, past and present
Aeroplane
Aeroplane ; 71 , n 1840
1946
4 pages
Aufsatz (Zeitschrift)
Englisch
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Helicopters -- Present and future
Engineering Index Backfile | 1951
|Helicopters -- Present and future
Engineering Index Backfile | 1951
|Helicopters -- Present and future
Engineering Index Backfile | 1951
|Present day use of helicopters
Engineering Index Backfile | 1951
|“PRESENT DAY USE OF HELICOPTERS”
SAE Technical Papers | 1950
|