Downloaded from https://www.everyspec.com Figure TABLE 2-5. Basic Climatic Design Type; Variable High Humidity Daily Cycle of Temperature, Solar Radiation, and Humidity. (QSTAG 360 Category B2) (4) High humidity chamber testing. Climate chamber tests can be used to determine whether materiel is likely to resist fungus growth and the mechanical effects of moisture. They cannot be expected to produce the overall effects on materiel that will result from tropical field testing. b. Basic hot daily cycle. (1) Location. Basic hot conditions exist in many parts of the world extending outward from the areas of hot-dry conditions in the United States, Mexico, Africa, Asia, and Australia.
They also occur in southern Africa, South America, southern Spain, and in southwest Asia. (2) Temperature, humidity, solar radiation. (a) Operational conditions. Design criteria are: eight continuous hours with an ambient air temperature above 105 ° F (41 ° C) with an extreme temperature of 110 ° F (43 ° C) for not more than 3 hours; a maximum ground surface 13 AR 70–38 • 15 September 1979