Physiological and Psychological Effects of Thermally Stressful UH-6O simulator Cockpit Conditions on Aviators Wearing Standard and Encumbered Flight Uniforms

This study evaluated the effects of the four combinations of unencumbered MOPPO aviator battle dress uniform (ABDU) and encumbered MOPP4 over ABDU flight ensembles in cool (70 degrees F, 50 percent relative humidity (RH)) and hot (100 degrees F, 50 percent RH) UH-60 cockpit conditions. This report describes the physiological and psychological responses. The most striking, operationally relevant result was that none of the crews in the encumbered MOPP4 hot condition were able to complete the first two 2-hour sorties movements. The results of this evaluation suggest that future rotary-wing aviator flight uniform components should be designed to be lighter weight and allow greater evaporation of sweat. Methods should be sought to improve fit and comfort, particularly for the mask and helmet combination, as well as prevent pressure discomfort over the back due to the life raft. The 11.7 lb ballistic protective plate also should be lighter weight and reduced in thickness. Forced dry air microclimate cooling into the ensemble should be considered for reducing heat accumulation in the encumbered MOPP4 aviator ensemble by enhancing evaporative cooling and thereby increasing endurance times during hot weather operations.Army Aeromedical Research Lab Fort Rucker AL is the author of 'Physiological and Psychological Effects of Thermally Stressful UH-6O simulator Cockpit Conditions on Aviators Wearing Standard and Encumbered Flight Uniforms' with ISBN 9781423584667 and ISBN 142358466X.