Accession Number:

ADA413300

Title:

Inertial Properties of an External-Frame Backpack Device

Descriptive Note:

Final rept. Nov 2001-Aug 2002

Corporate Author:

ARMY NATICK SOLDIER CENTER MA

Report Date:

2003-04-10

Pagination or Media Count:

62.0

Abstract:

Previously, an external-frame backpack device 35 kg was fabricated allowing for the placement of a 24.9-kg lead brick load in nine different positions. The purpose of this report was to determine the moment of inertia MOI of the backpack for the nine load positions relative to the backpacks center of mass COM reference axes originating on the backpack frame the COM for the human torso and backpack combined and the COM for the human body and backpack combined. For the backpack about its COM, the lowest MOI values were found when the COM was located intermediatecentral and intermediateclose relative to the load-carriers trunk. For the backpack relative to the reference axes, the lowest MOI values were found when the COM was located lowcentral and lowclose to the trunk. For the torso and backpack system and for the body and backpack system, the lowest MOI values were found when the COM relative to the trunk was in the intermediateclose or highclose position and the lowclose or intermediateclose position, respectively. These data will be used in research examining the effects of manipulations of the COM and the MOI of backpack loads on load carriers biomechanical and physiological responses.

Subject Categories:

  • Anatomy and Physiology
  • Stress Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE