Theoretical analysis of oscillations in hovering of helicopter blades with inclined and offset flapping and lagging hinge axes

M. Morduchow, F. G. Hinchey
naca-tn-2226
Dec 1950


The frequency and damping characteristics of the coupled flapping and lagging oscillations of helicopter blades in hovering are derived for the general case in which the lagging (vertical) hinge axis is offset from the flapping hinge axis, while both hinge axes are inclined.

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