Air flow as determined by classical blade element and momentum theories without assumption of constant chord or constant circulation along span, was estimated from theoretically determined charts; values compared with those obtained from actual measurements taken near model rotor with "Hot wire" anemometer.
Investigation of airflow underneath helicopter rotors
J Aeronautical Sciences
Journal of the Aeronautical Sciences ; 13 , n 12
1946
13 pages
Aufsatz (Zeitschrift)
Englisch
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