Accession Number : AD0772826

Title :   Open and Closed Loop Stability of Hingeless Rotor Helicopter Air and Ground Resonance,


Personal Author(s) : Young,Maurice I. ; Bailey,David J. ; Hirschbein,Murray S.

Report Date : 1974

Pagination or Media Count : 34

Abstract : The air and ground resonance instabilities of hingeless rotor helicopters are examined on a relatively broad parametric basis including the effects of blade tuning, virtual hinge locations, and blade hysteresis damping, as well as size and scale effects in the gross weight range from 5,000 to 48,000 pounds. A special case of a 72,000 pound helicopter air resonance instability is also included. (Modified author abstract)

Descriptors :   *Helicopters, *Helicopter rotors, Hysteresis, Damping, Reaction control systems, REsonance, Resonance absorption, Stability

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE