Author： Daughaday H.
Publisher： AHS International
ISSN： 2161-6027
Source： Journal of the American Helicopter Society, Vol.13, Iss.2, 1968-04, pp. : 65-82
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Abstract
A study is made of the possibility of using higher harmonic pitch angle inputs to suppress the transmission of oscillatory vertical forces from a helicopter rotor to its driving shaft. The aerodynamic loads that are the source of the objectionable forces are computed using a realistic model which represents the rotor blades by bound vorticity distributions and the wake by a mesh of segmented vortex filaments.
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