INVESTIGATION OF THE LATERAL/DIRECTIONAL STABILITY CHARACTERISTICS OF A FOUR-PROPELLER TILT-WING VTOL MODEL

Abstract

Results of an experimental investigation to determine the lateral/ directional stability characteristics of a four-propeller tilt-wing VTOL aircraft using a one-tenth scale dynamically similar model are presented. Test conditions include wing incidences of 89, 70, and 30 deg. Measurements of the transient motion of the model in the lateral/directional degrees of freedom and the static lateral/directional stability derivatives were made. The transient and steady-state data are analyzed assuming that the motions of the vehicle may be described by linearized equations, and the resulting static and dynamic derivatives are presented. The characteristics of the lateral/directional dynamic motion of the full-scale vehicle as predicted by the tests of the dynamically similar model are determined and discussed. All data are presented for a center-of-gravity position of 9-percent MAC, which is ahead of the most forward C.G. position of the aircraft (15-percent MAC), and the horizontal tail and flap programs differ from those presently used on the aircraft.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1968
Accession Number
AD0673147

Entities

People

  • Howard C. Curtiss Jr.
  • Richmond P. Boyden

Organizations

  • Princeton University

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Configurations
  • Aerodynamic Forces
  • Aircrafts
  • Airfoils
  • Airframes
  • Angular Motion
  • Center Of Gravity
  • Damping
  • Differential Equations
  • Dynamic Response
  • Equations
  • Equations Of Motion
  • Horizontal Stabilizers
  • Measurement
  • Steady State
  • Tilt Wings
  • Vehicles

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.