ROTOR/WING

Abstract

The report presents the technical status of the rotor/wing concept of a stopped-rotor helicopter configuration. The configuration presents attractive performance characteristics for a high-speed VTOL aircraft. The ability to predict aerodynamic performance characteristics in all flight modes is substantiated by wind-tunnel tests. A major technical problem of 3-per-rev oscillating loads on the rotor/wing pylon was minimized by the effective use of cyclic blade pitch during the high-advance-ratio portion of conversion. High values of oscillating blade-root moments were recorded during testing of a dynamic model. It is not known if there is a schedule of cyclic pitch that will minimize both pylon loads and blade-root loads simultaneously.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1970
Accession Number
AD0710425

Entities

People

  • F. J. Briardy
  • J. R. Neff
  • S. V. Laforge

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aerodynamic Configurations
  • Aircraft Equipment
  • Aircrafts
  • Airfoils
  • Airframes
  • Airplanes
  • Autogyros
  • Boundary Layer
  • Computational Science
  • Helicopters
  • Mach Number
  • Model Tests
  • Test And Evaluation
  • Vehicles
  • Wind Tunnel Tests
  • Wind Tunnels

Readers

  • Aerospace Engineering
  • Electronics Engineering