Downloaded from https://www.everyspec.com 2–3. High elevation and upper air conditions. a. For materiel subject to transport through high mountain passes, the temperatures and pressures for elevations as high as 15,000 feet (4,572 meters) apply. b. For materiel subject to shipment by air (elevations as high as 50,000 feet or 15,240 meters), the low air pressure and temperature shown below could result from failure of cabin pressure and temperature regulation. Figure 2-1B. Elevation, Pressure and Temperature Section II CLIMATIC DESIGN TYPES 2–4. Hot climatic design type. a. Hot-dry cycle. (1) Location.
Hot-dry conditions are found seasonally in the deserts of northern Africa, the Middle East, Pakistan and India, southwestern United States, and northern Mexico (fig. 2-1). (2) Temperature, humidity, solar radiation. (a) Operational conditions. On the extreme hot-dry days, temperature, humidity, and solar radiation may follow a pattern similar to that shown in tables 2-2. Nominal accompanying windspeeds at the time of high temperatures are 13 fps (4 mps). The maximum ground surface temperature is 146 ° F (63 ° C.
At ground elevations above 3,000 feet (915 m), maximum air temperatures will be lower by approximately 5 ° F per 1,000 feet 9.1 ° C per 1,000 m) and solar radiation may be higher by approximately 4 Bph (British thermal units per square foot per hour) per 1,000 feet (43 W/ m 2 per 1,000 m) to 15,000 feet. 8 AR 70–38 • 15 September 1979