Thrust Vectoring to Eliminate the Vertical Stabilizer

Abstract

Root locus analysis techniques are used to design an active thrust vector control system to provide the directional stability for an F-111 without the vertical stabilizer. A linear analysis of the lateral-directional modes is performed for the aircraft both with and without the vertical stabilizer. The aircraft with the vertical stabilizer is used as a baseline. Computer histories for discrete atmospheric turbulence and a covariance analysis for random turbulence are used for the evaluation. It is found that the thrust vector control produces a response as good as or better than the baseline aircraft. Requirements for the thrust vector deflection and rate of deflection are generated. The lowest possible rate of deflection for acceptable flying qualities is shown to be 1 rad/sec.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1979
Accession Number
ADA079852

Entities

People

  • Roy E. La Froth

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Atmospheric Motion
  • Closed Loop Systems
  • Computational Fluid Dynamics
  • Computer Programs
  • Control Systems
  • Engineering
  • Equations
  • Equations Of Motion
  • Equations Of State
  • Fighter Aircraft
  • Frequency Response
  • Plastic Explosives
  • Resonant Frequency
  • Steady State
  • Vertical Stabilizers

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Control Systems Engineering.