Accession Number : ADA289700

Title :   Evaluation of a Proposed F-4 Ejection Seat Cushion by +Gz Impact Tests.

Descriptive Note : Final rept. Jul 86-Jun 87,

Corporate Author : ARMSTRONG LAB WRIGHT-PATTERSON AFB OH CREW SYSTEMS DIRECTORATE

Personal Author(s) : Brinkley, James W. ; Perry, Chris E. ; Salerno, Mark D. ; Orzech, Mary A.

PDF Url : ADA289700

Report Date : JUL 1993

Pagination or Media Count : 119

Abstract : During 1986 to 1987, approximately 45 human impact experiments were accomplished on a vertical deceleration tower to evaluate the influence of three separate seat cushions on the human biodynamic response during positive vertical (+ Gz) impact accelerations that simulated the catapult phase of ejection. The human subjects were exposed to the following three seat cushions at a peak impact level of 10 G: (1) the standard operational F-4 ejection seat cushion, (2) the standard operational ACES II ejection seat cushion, and (3) a proposed F-4 ejection seat cushion composed of ConformTM foam. Principle measurements that were collected and analyzed included seat pan loads, head accelerations, and chest accelerations. Test results showed that the current operational F-4 seat cushion produced greater biodynamic responses (in terms of parameter magnitudes) during vertical acceleration than either the proposed F-4 seat cushion or the ACES II seat cushion.

Descriptors :   *EJECTION SEATS, *CUSHIONING, TEST AND EVALUATION, PEAK VALUES, IMPACT, HUMANS, ACCELERATION, IMPACT TESTS, TOWERS, VERTICAL ORIENTATION, RESPONSE, CATAPULTS, EJECTION, THORAX, DECELERATION, FOAM, BIODYNAMICS, SEATS, IMPACT ACCELERATION, PADS(CUSHIONS), AIRCRAFT SEATS.

Subject Categories : Aircraft
      Escape, Rescue and Survival

Distribution Statement : APPROVED FOR PUBLIC RELEASE