WIND-TUNNEL INVESTIGATION OF THE HOVERING, TRANSITION, AND CRUISING PERFORMANCE OF AN ARRESTED ROTOR (TRIDENT) VTOL AIRCRAFT CONCEPT.

Abstract

Wind-tunnel tests were conducted to evaluate static stability and control characteristics with emphasis on determining the magnitude of transition problems. Evaluating the compatibility of the competing internal and external aerodynamic requirements for high static lift and efficient cruising was an additional test objective. Test results show that the model exhibits a strong directional trim shift through transition. The pattern selected for rotor arrestment during evaluation of the transition characteristics was not acceptable on the basis of power required to support vehicle weight or control of trajectory. The results further indicated that the performance potential of the ducted rotor -nozzle system may be limited because of the structural requirements. Model rotor duct design, from the standpoint of internal aerodynamics, was compromised by adding structure to accommodate the wing bending loads for high-speed cruising. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1966
Accession Number
AD0632777

Entities

People

  • Gary W. Brasseur
  • William B. Maguire

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerodynamics
  • Aircrafts
  • Directional
  • Hovering
  • Mechanical Structure
  • Test And Evaluation
  • Trajectories
  • Transitions
  • Vehicles
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Marine Hydrodynamics
  • Systems Analysis and Design