Accession Number : AD0774750

Title :   A Fixed-Base Ground Simulator Study of Control and Display Requirements for VTOL Instrument Landings with a Decelerating Approach to a Hover.

Descriptive Note : Final rept.,


Personal Author(s) : Aiken,Edwin W. ; Schuler,John M.

Report Date : FEB 1974

Pagination or Media Count : 97

Abstract : An exploratory study of the control and display requirements for performing decelerating transition landings on instruments with the X-22A aircraft was conducted utilizing the X-22A fixed-base ground simulator as a test bed. This experiment was prerequisite for an in-flight VTOL Transition Landing Program using the variable stability X-22A as a research vehicle. Both full and partial transitions to a hover were flown along a 10 degrees glide path at deceleration levels of up to 0.1 g. Various control/display system combinations were designed, developed, and evaluated for the task. Two specific objectives of the experiment were to investigate the benefits of a direct velocity control system, as opposed to the normal X-22A thrust controls, and to determine the feasibility of adapting, through electronic rather than mechanical means, the X-22A duct rotation system to direct velocity control. (Modified author abstract)

Descriptors :   *Vertical takeoff aircraft, *Instrument landings, Flight simulators, Deceleration, Hovering, Digital simulation, Attitude control systems, Glide slope

Subject Categories : V/STOL

Distribution Statement : APPROVED FOR PUBLIC RELEASE