Accession Number : ADD006052

Title :   Vertical Seeking Aircrew Escape System.

Descriptive Note : Patent Application,


Personal Author(s) : Stone,James W ; Stoutmeyer,Ronald G

Report Date : 26 Apr 1979

Pagination or Media Count : 13

Abstract : The present invention comprises an aircraft ejection seat which seeks the upward vertical direction to enable safe ejection from an inverted aircraft at low altitude. A spherical rocket motor is mounted in a two axis gimbal system attached to the bottom of the ejection seat. A hydraulic accumulator having a pressure source and containing hydraulic fluid is attached to hydraulic actuators which move the rocket motor gimbal rings about the pitch and roll axes. Flow of pressurized fluid to the actuators is controlled by a pair of hydraulic valves, which are controlled by a microprocessor. Feedback potentiometers mounted on each gimbal ring axis sense gimbal ring position and communicate the gimbal ring position to the microprocessor. Three-axis rate gyros attached to the seat communicate with the microprocessor to monitor seat pitch, roll, and yaw rates. the microprocessor also controls sequencing of events, such as pressurization of the accumulator, firing of the rocket motor, parachute deployment timing, and man-seat separation.

Descriptors :   *Patent applications, *Ejection seats, Rocket engines, Gimbals, Microprocessors, Hydraulic accumulators, Aviation safety, Low altitude, Vertical orientation, Attitude control systems, Potentiometers, Feedback

Subject Categories : Aircraft
      Escape, Rescue and Survival

Distribution Statement : APPROVED FOR PUBLIC RELEASE