The Feasibility and Use of Anti-Torque Surfaces Immersed in Helicopter Rotor Downwash

Abstract

An analytical investigation was made of the effectiveness of anti- torque aerodynamic surfaces immersed in helicopter rotor downwash. It is shown that additional vertical tail surface having areas equal to about two percent of the main rotor disk area could provide torque trim for speeds above about 75 ft/sec for representative current vehicles.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1970
Accession Number
AD0715438

Entities

People

  • Chee Tung
  • Frank A. Duwaldt
  • John C. Erickson Jr.

Organizations

  • Calspan

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aerodynamic Configurations
  • Aeronautical Laboratories
  • Aircrafts
  • Airfoils
  • Airframes
  • Aspect Ratio
  • Control Surfaces
  • Flaps (Control Surfaces)
  • Flight Speeds
  • Fuselages
  • Ground Effect
  • Helicopter Rotors
  • High Lift
  • High Lift Devices
  • Jet Flaps
  • Tail Rotors

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Marine Hydrodynamics
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).