Abstract
Helmet impact velocity experimental data is analyzed and various factors that influence the impact velocity are studied. One of the main goals of this report is to verify whether a tolerance of +/- 3 percent of mean velocity is feasible and will allow at least 95 percent of impacts to fall within the proposed impact velocity range. Statistical methods are applied to the design of impact velocity tolerances. Calibration procedures and data variances from several laboratories are also incorporated into this analysis. (Author/publisher)