THE EFFECT OF ACCELERATION ON HUMAN CENTERS OF GRAVITY
GENERAL DYNAMICS CORP FORT WORTH TX
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The location in two-dimensional x-z space of the center of gravity of the seated human body was studied on 25 living male subjects under conditions of experimentally controlled changes in the angle at which a 1g acceleration acted upon the completely restrained body. Varying the direction of acceleration from 15 degrees through 80 degrees, measured from the torso axis forward, produced a migration of the group average center of gravity along a curved path of 2.15 seconds arc length, a consistent rotation of the axis of maximum individual variability from 10 degrees 53 minutes aft of the torso axis to a maximum forward angle of 90 degrees 16 minutes, and a characteristic fluctuation in absolute size of the individual variation about the group average. The practical applications of these findings to the design of rocket-powered systems e.g., escape capsules is discussed.
- Human Factors Engineering and Man Machine Systems