AERODYNAMIC CHARACTERISTICS OF HELICOPTER ROTORS. ROTOR CONTRIBUTIONS TO HELICOPTER STABILITY PARAMETERS

Abstract

Theoretical expressions are derived for the aerodynamic forces on a helicopter rotor, and for their contributions to various stability derivatives. The resulting expressions are tabulated, containing a number of functions of advance ratio which are presented graphically. Offset hinges and pitch-flap coupling are provided for in the formulation. A novel method for trim calculation is presented. The theory is based on the original results of Bailey (NACA TR 716, 1941). It involves some changes in notation, axes, assumptions, and the structure of formulas to widen their scope and improve their convenience for stability estimates. Discussion of the limiting assumptions is offered.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1963
Accession Number
AD0831343

Entities

People

  • Edward Seckel
  • H. C. Curtiss Jr.

Organizations

  • Princeton University

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Aerodynamic Characteristics
  • Aerodynamic Forces
  • Aerodynamics
  • Aeronautical Engineering
  • Aircrafts
  • Airframes
  • Couplings
  • Dynamic Response
  • Equations
  • Flight
  • Flow
  • Helicopter Rotors
  • Helicopters
  • Rotation
  • Secondary Flow
  • Vibration

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Computational Modeling and Simulation
  • Systems Analysis and Design