Engineering

FILE - In this Sept. 11, 2017, file photo, a VICIS Zero1 helmet is displayed in New York. In an annual study, designed by NFL- and NFLPA-appointed biomechanical engineers, rotational velocity and acceleration are measured to evaluate helmets to determine which helmets best reduced head impact severity. The VICIS Zero1 was top rated. (AP Photo/Mark Lennihan, File)
May 10, 2019 - 1:00 pm
NEW YORK (AP) — Did some helmet manufacturers design models with the purpose of testing well rather than performing properly on the field? Possibly, but the lab testing by the biomechanical engineers appointed by the league and its players' union accounted for such a practice in the rankings for...
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