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

Downloaded from https://www.everyspec.com times. Tests against hot-humid cycle conditions should be required only for systems that are specified for use in these designated areas. (2) Temperature, humidity, solar radiation. (a) Operational conditions. On days with extremely high dewpoints (high absolute humidity), a cycle such as that in table 2-3 may occur, along with windspeeds between 8 and 17 fps (2.4 and 5.2 mps) and a maximum ground surface temperature of 130 ° F (54 ° C). (b) Storage and transit conditions. Induced storage temperatures are presumed to be the same as those for the hot- dry cycle although relative humilities in the enclosed space are considerably higher.

Figure TABLE 2-3. Hot Climatic Design Type; Hot-Humid Daily Cycle of Temperature, Solar Radiation, and Humidity. (QSTAG 360 Category B3) 10 AR 70–38 • 15 September 1979