The dimensions and inertial properties of the segments of an Alderson, 50th percentile anthropometric dummy were measured. The dummy, model F-50-AU, was disassembled into 10 main segments and measurements of weights, lengths, center-of-gravity positions, and moments-of-inertia were performed on each segment. Lengths were measured directly with a scale and weights were determined on a scale balance. A "balance test" was performed on each segment to determine its center-of-gravity position. Moment-of-inertia data were measured by means of a torsional pendulum apparatus. A comparison is presented of these data with measured data of a Swedish dummy, type DV, and available human cadaver data.

Segment properties of the Alderson dummy compare closely with those of the cadaver study. The torso plus head moment-of-inertia, however, appears to be approximately 31 percent smaller than measured data from a cadaver. Comparison of Alderson segment data with the Swedish measurements show the two dummies to be similar except in the torso region. Again, the Alderson torso is lighter and has less moment-of-inertia than the Swedish dummy.

Accuracy of the measured moments-of-inertia of Alderson dummy segments on the torsional pendulum are from 1 to 2 percent.