The OV-1 (Mohawk) is a two place, twin engine, fast and maneuverable aircraft used for reconnaissance missions. Following reports of heat stress in Mohawk crews in June 1966 in Vietnam, 17 missions and 24 subjects were studied for water losses; in 7 of these missions 7 pilots and the investigator also had rectal and skin temperature measured during flight. Ground and cockpit WBGT's were measured. Low level visual reconnaissance flights during the day were found to be the most stressful, with water losses (sweat) of 405 ml/hr man, while rectal and skin temperatures and heat gains were well compensated by the high sweat rates. An average of 82 kcal/hr man of transient heat gain was acquired from the environment, and an average of 209 kcal/hr man of heat was contributed to the cockpit environment. Evening and night missions were found to cause modest dehydration. It did not appear that the air crews were subjected to an uncompensable heat strain. These data are nearly identical to those secured by Adolph in 1944 in simulated tactical situations. At least for the variables measured, actual combat circumstances did not appear to cause additional physiological strain. In-flight water drinking, cockpit ventilation, and lighter clothing were recommended to reduce air crew discomfort and restore homeostatic conditions. These suggestions were implemented by command and appear to have alleviated the problem. (Author)


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    Title :

    Heat Stress in Army Pilots Flying Combat Missions in the Mohawk Aircraft in Vietnam


    Contributors:

    Publication date :

    1967


    Size :

    6 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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