A Statistical Study of Grip Retention Force

Abstract

To assess an ejection seat occupant's ability to hold on to a handle the data from the two-handed force retention capability tests of Garrett, Alexander and Bennett are analyzed to produce curves of probability of letting go as a function of force. Two curves are produced; one for double grip handles, comprising a T-Bar and a Twin Grip; and one for Rings, comprising a flexible loop and the familiar, rigid D-Ring. It is concluded that, at the force levels experienced in most present-day ejections, which occur at low and moderate air speeds, the probability of letting go a ring is an order of magnitude greater than for a double grip handle. It is concluded that handle design strongly influences the probability of letting go, and therefore the probability of arm flail injury.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1973
Accession Number
AD0767904

Entities

People

  • Fred W. Hawker
  • Theodore W. Horner

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Biomedical Research
  • Confidence Limits
  • Contracts
  • Data Analysis
  • Data Mining
  • Data Science
  • Ejection
  • Ejection Seats
  • Equations
  • Information Science
  • Intervals
  • Probability
  • Seats
  • Standards
  • Statistics

Readers

  • Calculus or Mathematical Analysis
  • Explosive Engineering.
  • Robotics and Automation.