Comparisons of Methods of Computing Bending Moments in Helicopter Rotor Blades in the Plane of Flapping

Abstract

Several methods of computing bending moments in helicopter rotor blades in the plane of flapping are reviewed, and the results of a numerical example analyzed by four different methods are compared. The effect on computed bending moments of the tip-loss correction introduced by Wheatley is also considered. The comparison indicates that, from the standpoint of accuracy of results and ease of application, the method proposed by Cierva is the most suitable for routine analyses. The tip-loss correction is shown to have a substantial effect on computed bending moments.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1945
Accession Number
ADB804328

Entities

People

  • Arthur R. Luecker
  • John E. Duberg

Organizations

  • National Advisory Committee for Aeronautics

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Aerodynamic Forces
  • Aeronautical Laboratories
  • Aircrafts
  • Airframes
  • Bending Moments
  • Bending Stress
  • Differential Equations
  • Equations
  • Helicopter Rotors
  • Helicopters
  • Inertia
  • Mass
  • Physical Properties
  • Rotary Wing Aircraft
  • Stress Analysis
  • Stresses

Readers

  • Aerodynamics.
  • Systems Analysis and Design