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Two-Handed Retention on Various Handle Configurations

Report Number: AMRL TR 67-63
Author(s): John W. Garrett; Milton Alexander; William G. Bennett
Corporate Author: Aerospace Medical Research Laboratories
Laboratory: Aerospace Medical Research Laboratories
Date of Publication: 1967-05
Pages: 15
Contract: Laboratory Research - No Contract
Project: 7184
Task: 718408
AD Number: AD0658441

This report presents data on the manual grip-retention capability of seated persons. Nine male subjects, grasping experimental ejection actuators located forward of an ejection seat pan, were required to maintain their grasp against force loadings of 50 to 500 pounnds. Grip retention at various increments of time to a maximum of 30 seconds are compared for each of the four handles: a T-bar, Twin grips, a standard D-ring and a flexible Gemini-type loop. Test results indicated that the T-bar provides the greatest grip-retention capability. Potential applications of these performance data are discussed.

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