Evaluation of the Safety Performance of Ejection Seat Cushions

Abstract

Several operational and prototype ejection seat cushions were selected for the evaluation of their performance for the prevention and reduction of spinal injuries. The evaluation was performed using impact tests on the vertical deceleration tower, where a cushion was placed between the seat pan and the occupant (a 50th percentile Hybrid III manikin) and was subjected to +Gz impact at 8, 10, and 12 g, respectively. For comparison, tests were also conducted on a bare seat pan without a cushion. Based on the test data, analyses were performed to determine the dependency of certain occupant responses and structural responses on the cushions. The cushions were ranked in the sequences illustrating their performance merit in terms of the peak values of the lumbar force and other responses.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2004
Accession Number
ADA446609

Entities

People

  • Joseph A. Pellenttiere
  • Zhiqing Cheng

Organizations

  • General Dynamics

Tags

Communities of Interest

  • Biomedical
  • Engineered Resilient Systems

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Aircrafts
  • Deceleration
  • Dynamic Response
  • Ejection Seats
  • Engineering
  • Materials
  • Mechanical Engineering
  • Mechanical Properties
  • Military Aircraft
  • Military Research
  • Peak Values
  • Sequences
  • Spinal Injuries
  • Structural Response
  • Test And Evaluation

Readers

  • Acoustics.
  • Aviation Science / Aeronautics.
  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience