+GZ Impact Tests of the Large JPATS Manikin in a Simulated Martin-Baker Ejection Seat.

Abstract

One Large Joint Primary Aircraft Training System (JPATS) manikin and one GARD CG manikin were exposed to a series of short-duration z-axis acceleration pulses on the Armstrong Laboratory Vertical Deceleration Tower. The manikins were placed in a test fixture intended to simulate the Martin-Baker MKUS16LA ejection seat. Biodynamic response data were collected in order to evaluate the dynamic effect of the manikins on the seat during a simulated ejection. The results demonstrated the presence of large lap belt loads and excessive hip and knee displacements in tests with the Large JPATS manikin. It was determined that these phenomena were due to several factors which included the pre-impact positioning of the manikin's thighs above the seat pan, the fabric of the flight suit, the length of the seat pan, and the center of mass of the manikin's lower torso. Modifications which altered the weight and center of mass of the Large JPATS manikin's legs and extended the seat pan length were successful in reducing the loads and motions.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1997
Accession Number
ADA344944

Entities

People

  • John R. Buhrman

Organizations

  • Armstrong Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acquisition
  • Air Force
  • Cameras
  • Computers
  • Coordinate Systems
  • Data Acquisition
  • Data Analysis
  • Ejection
  • Ejection Seats
  • Impact Tests
  • Load Cells
  • Measurement
  • Recording Systems
  • Reliability
  • Test Facilities
  • Test Fixtures
  • Three Dimensional

Fields of Study

  • Engineering

Readers

  • Explosive Engineering.
  • Materials Science