Heat Stress Effects of a Navy/USMC vs. Army Aviator Ensemble in a UH-6O Helicopter Simulator
ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
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This aviator heat stress study used a between test subjects design with one environmental condition hot and two current U.S. NavyU.S. Marine Corps vs. U.S. Army rotary wing MOPP4 ensembles encumbered with additional ballistic protective and overwater survival components. Four U.S. Marine Corps USMC aviators 2 UH-60 crews were tested in the hot condition and their physiological, subjective, and flight performance responses compared to those of 14 Army aviators 9 crews who tested in the same condition in a previous related study. The environmental condition consisted of 100 deg F dry bulb and 20 percent relative humidity RH in an environmental chamber where test subjects walked on a treadmill for 20 minutes to simulate preflight outdoor activities, and 100 deg F and 50 percent RH 90 deg F wet bulb globe temperature WBGT in the UH-60 simulator. Every 30 minutes the right seat pilot encountered instrument meteorological conditions and ascended to 2000 feet to perform a 10 minute set of standard maneuvers. These maneuvers included straight and level SL, right standard rate turn RSRT, left climbing turn LCT, and left descending turn LDT. After each iteration of the set of standard maneuvers, the pilot returned to nap of the earth NOE and contour flight between control points. The right seat pilot also performed up to four 1 minute hovers HOVs and hover turns HOVTs in the 2 hour sortie and three in the second 2 hour sortie.