Impacts were conducted using a free drop setup over a range of impact locations and heights. Impact locations (A) vertex, (B) frontal, (C) oblique, (D) parietal, (E) occipital, and (F) facemask were chosen to represent impacts commonly observed in American football. Briefly, the headform was hoisted to a specified height and orientation using a net, and released to impact an aluminum plate (Kuo et al, 2016). (R1-22).