HEAD COOLING IS DESIRABLE BUT NOT ESSENTIAL FOR PREVENTING HEAT STRAIN IN PILOTS

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Authors
  1. Frim, J.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Liquid cooled garments (LCGs) are being considered for reducing heat strain in pilots. While head cooling has been shown to be thermally efficient and subjectively desirable, it is technically difficult to achieve. This laboratory study was carried out to see if head cooling in addition to torso cooling is a necessity. Six male subjects wore a cooling vest and cap under summer flight clothing on 3 occasions in a climatic chamber set at Tdb=42C, Twb=32C (RH=50%), Tg=52C at head position, WBGT=35C. Cooling fluid was circulated from a reservoir maintained at 10C. Subjective thermal comfort assessments confirmed the desirability of head cooling, but performance measurements and physiological measurements of thermal strain showed no statistically significant differences between conditions VEST and HEAD. It was concluded that head cooling is desirable but not essential.
Report Number
DCIEM-89-P-26 — Reprint; Research Paper
Date of publication
15 Nov 1989
Number of Pages
9
Reprinted from
Aviation, Space, and Environmental Medicine, 1989, p 1056-1062
DSTKIM No
90-00939
CANDIS No
63213
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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