Instances of lagging instability on rotors were encountered in whirl stand tests of full scale blades; applications of theory relating to mechanism of these instabilities to helicopters for which actual flight data exists resulted in contradictions; additional term arising from aerodynamic damping of lag motion is shown to have significant stabilizing effect and improves degree of correlation.
Recent studies of pitch-lag instabilities of articulated rotors
Am Helicopter Soc -- J
American Helicopter Society -- Journal ; 6 , n 3
1961
9 pages
Aufsatz (Zeitschrift)
Englisch
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