STUDY OF SIZE EFFECTS ON VTOL HANDLING QUALITIES CRITERIA

Abstract

A fundamental study is presented of the effects of vehicle size on handling qualities of jet and helicopter-type VTOL aircraft at hover and low speeds, size being defined by the characteristic linear dimension. The effects of size on vehicle handling qualities capability and pilot-vehicle compatibility are developed. Consideration is given to the pilot as an adaptive nonlinear servo. The study indicates: (1) Control power/inertia and damping/inertia tend to decrease with size. (2) Except for tail rotor helicopters in yaw, final angular rates are relatively invariant with size. (3) Characteristic time to reach final angular rate increases with size. (4) Linear accelerations and motions are nearly invariant with size. (5) Effects of external disturbances and trim changes with speed on jet VTOL vehicles decrease at least as rapidly as control power/ inertia.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1965
Accession Number
AD0622578

Entities

People

  • Carl F. Friend
  • Irven H. Culver
  • J. F. Johnston

Organizations

  • Lockheed Martin

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Aerodynamic Characteristics
  • Aerodynamic Forces
  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Angular Acceleration
  • Army Aviation
  • Control Systems
  • Helicopters
  • Moment Of Inertia
  • Momentum
  • New York
  • Propulsion Systems
  • Rotary Wing Aircraft
  • Short Takeoff Aircraft
  • Vehicles

Fields of Study

  • Physics

Readers

  • Aerosol Science/Aerosol Physics
  • Aerospace Engineering
  • Control Systems Engineering.