Thermal Stress Inside the XM-1 Tank Ddring Operations in an NBC Environment and Its Potential Alleviation by Auxiliary Cooling.
ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
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Thermal stress inside an XM-1 tank parked in the desert was evaluated on heat-acclimated crewmen dressed in the standard Combat Vehicle Crewman CVC uniform plus various configurations of chemical protective clothing i.e. Mission-Oriented Protective Postures MOPP i-IV. In addition, an auxiliary water-cooled vest WVC was tested for its potential in alleviating heat stress imposed on the active crewmen in a closed hatch, unventilated tank. Two tank crews 4 crewmen each alternated exposures during the six days of testing. Days 1-3 MOPP I, III, and IV presented moderate heat stress to the crews, whereas on Days 4 and 6, the tanks environmental conditions with hatches closed and ventilator off were intolerable in MOPP IV. Exposure times on Day 4 and Day 6 were 80 and 124 min, respectively, with termination due to crew distress accompanied by high heart rates HR andor convergence of mean weighted skin temperature MWST and deep body temperature T sub re. The WCV on Day 5 appreciably reduced the heat stress by preventing convergence of MWST on T sub re HR and T sub re responses were substantially lower with WCV as opposed to Days 4 and 6 when the vest was not worn. Author
- Stress Physiology
- Chemical, Biological and Radiological Warfare