A Theoretical and Experimental Investigation of Flap-Lag Stability of Hingeless Helicopter Rotor Blades

Abstract

A substantial insight into the fundamental stability characteristics of the hingeless rotor may be obtained by considering only the flap and lead-lag degrees of freedom of a single blade. Although portions of this problem have been examined in previous research, the effects of may basic rotor parameters are poorly understood. The present study was undertaken to provide a rigorous formulation of the problem, and to systematically investigate the important parameters which characterize actual hingeless rotor blade configurations. In the absence of available experimental data a model rotor was designed and tested to validate the theoretical analysis.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1972
Accession Number
AD0750359

Entities

People

  • Robert A. Ormiston
  • William C. Bousman

Tags

DTIC Thesaurus Topics

  • Aircrafts
  • Bending Moments
  • Boundaries
  • Coefficients
  • Coordinate Systems
  • Differential Equations
  • Elastic Properties
  • Equations
  • Equations Of Motion
  • Experimental Data
  • Frequency
  • Helicopter Rotors
  • Helicopters
  • Partial Differential Equations
  • Resonant Frequency
  • Rotary Wing Aircraft
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Systems Analysis and Design