IMPACT TEST METHODS AND RETENTION HARNESS CRITERIA FOR U. S. ARMY AIRCREWMAN

摘要

This report discusses impact test methods and helmet retention harnesses for U. S, Army aircrew protective helmets. On the basis of simple analyses and some experimental testing, recommendations are made for the design and testing of helmet retention harnesses, A collar-type" retention harness is recommended, and two tests are suggested as a method of insuring a good design. Impact tests were conducted by an impact or-drop method and a head-form drop method. These test methods employ one movable piece and one fixed piece rather than two movable pieces as are currently used by most test agencies. On the basis of the impact test results, it is recommended that the impact or-drop method be used for the qualification of U. S. Army aircrew helmets. Probable head impact velocities and impact surfaces are discussed, and impact test conditions are specified.