Department of the Army AR 70-38 — Army Regulation AR 70-38: RDT&E of Materiel for Extreme Climatic Conditions Manual PDF

Downloaded from https://www.everyspec.com Figure TABLE 2-2. Hot Climatic Design Type: Hot-Dry Daily Cycle of Temperature, Solar Radiation, and Humidity. (QSTAG 360 Category A1) (b) Storage and transit conditions. The daily cycle for storage and transit in table 2-2 shows 5 continuous hours with air temperatures above 150 ° F (66 ° C) and an extreme air temperature of 160 ° F (71 ° ) for not more than 1 hour. Testing for these conditions should be done, if practicable, according to the daily cycle, because prolonged exposure to the high temperature extremes may impose an unrealistic heat load on materiel.

If not practicable, testing will be done at a temperature representative of the peak temperature that the materiel would attain during a daily cycle. b. Hot-humid cycle. (1) Location. These severe dewpoint conditions occur only along a very narrow coastal strip (probably less than 5 miles) bordering bodies of water with high surface temperatures, specifically the Persian Gulf and the Red Sea. The hot-humid cycle will be used as a design condition only for systems intended for use or likely to be used in these limited areas. Areas reporting these highest worldwide dewpoints may also experience hot-dry conditions at other 9 AR 70–38 • 15 September 1979