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

摘要

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)