Measurement of Mass and Cg Location of Helmet Systems

A procedure is described to measure the mass and CG location of helmet systems and relate these to head inertial properties. This procedure provides helmet mass properties data with respect to a consistent head coordinate system so that the mass properties of different helmet systems may be directly compared, allowing measurement of net head inertial property changes due to the addition of head mounted equipment. Relating helmet mass properties data to a consistent head coordinate system permits existing ejection safety criteria for head supported mass and CG location to be applied directly.