Accession Number : AD0675766

Title :   A FLIGHT INVESTIGATION OF VARIOUS STABILITY AUGMENTATION SYSTEMS FOR A JET-LIFT V/STOL AIRCRAFT (HAWKER-SIDDELEY P1127) USING AN AIRBORNE SIMULATOR,

Corporate Author : NATIONAL AERONAUTICAL ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : McGregor,D. M.

Report Date : FEB 1968

Pagination or Media Count : 40

Abstract : A flight investigation of various stability augmentation systems for jet-lift V/STOL aircraft, using a variable stability helicopter, is reported. The main emphasis was placed on overcoming the directional divergence due to the unstable weathercock stability that occurs at low airspeeds, but short investigations of a roll stabilizer to reduce the pilot work load, and a pitch stabilizing device to assist the pilot to maintain attitude in the presence of an angle-of-attack instability, were included. Both visual and a limited number of simulated instrument flights were conducted. After testing several stabilizing devices, it was concluded that a lateral accelerometer operating through the yaw reaction controls yielded directional handling qualities in the 'acceptable-satisfactory' region. (Author)

Descriptors :   (*VERTICAL TAKEOFF AIRCRAFT, STABILIZATION SYSTEMS), (*SIMULATORS, AIRBORNE), FLIGHT TESTING, STABILITY, FAILURE, ANGLE OF ATTACK, ROLL, PITCH(MOTION), SIMULATION, ACCELEROMETERS, YAW, SHORT TAKEOFF AIRCRAFT, EQUATIONS OF MOTION, CONTROL SYSTEMS, AERODYNAMIC CHARACTERISTICS, CANADA

Subject Categories : V/STOL
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE