Accession Number : ADA328863

Title :   Whole Body Center of Gravity and Moments of Inertia Study.

Descriptive Note : Final rept. 15 Dec 95-31 Dec 96

Corporate Author : ARMSTRONG LAB BROOKS AFB TX

Personal Author(s) : Schultz, Rebecca B. ; Obergefell, Louise A. ; Rizer, Annette ; Albery, Christopher B.

PDF Url : ADA328863

Report Date : DEC 1996

Pagination or Media Count : 36

Abstract : With the inclusion of women in combat aircraft, the question of safe ejection seat operation is raised. The population of combat pilots now includes much smaller ejection seat occupants, which could significantly effect seat performance. The objective of this study is to measure human whole-body center of gravity (CG) locations and moments of inertia (MOI) on 69 subjects who anthropometrically represent the possible future pilot population (98-245 pounds). A procedure has been developed to measure human whole-body CG and MOI in a seated position using a Space Electronics Mass Properties Instrument. MOI of a subject is measured along six different axes: the three primary axes X (chair on back), Y (chair on right-hand side), and Z (chair upright), and three off-axes positions XY, YZ, and XZ with the chair at a 45 degree angle between the primary axes. Accuracy and repeatability testing have shown this procedure is having approximately 2-5% error. Data collected from this study is being used to validate the Articulated Total Body (ATB) model for use as a predictive tool. In addition, it will be used to provide criteria for use of Air Force and Navy ejection seats by the expanded population.

Descriptors :   *GRAVITY, *MOMENT OF INERTIA, MEASUREMENT, WARFARE, AIR FORCE, MILITARY AIRCRAFT, HUMANS, PILOTS, ACCURACY, POPULATION, AXES, SAFETY, OPERATION, EJECTION SEATS, EXPANSION, WOMEN, COMBAT FORCES, NAVAL EQUIPMENT.

Subject Categories : Astronomy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE