MIL-T-62255C(AT)
3.2.4.1 Climatic conditions. The vehicle shall be capable of operation in ambient temperatures from +125°F to -25°F, as specified in categories 1 through 6 of Table I.
3.2.4.2 Climatic conditions, extreme. When specified (see 3.1.1.10), the vehicle shall be capable of operation in ambient temperatures of -25°F to -50°F, as specified in Category 7 of Table I.
3.2.4.3 Climatic conditions, storage and transit conditions. Vehicle shall be capable of meeting the storage and transit conditions as specified in Categories 1 through 7 of Table I without evidence or malfunction on any component of the vehicle.
TABLE I. SUMMARY OF TEMPERATURE, SOLAR RADIATION, AND
RELATIVE HUMIDITY DIURANAL EXTREMES
OPERATIONAL CONDITIONS STORAGE AND TRANSIT CONDITIONS
CLIMATIC CATEGORY |
AMBIENT AIR TEMPERATURE- DEGREES F |
SOLAR RADIATION- BTU/FT2/HR |
AMBIENT RELATIVE HUMIDITY- % |
INDUCED AIR TEMPERATURE DEGREES F |
INDUCED RELATIVE HUMIDITY % |
1 WET-WARM |
Nearly Constant 75 |
Negligible |
95 to 100 |
Nearly Constant 80 |
95 to 100 |
2 WET-HOT |
70 to 95 |
0 to 360 |
74 to 100 |
90 to 160 |
10 to 85 |
3 HUMID-HOT COASTAL DESERT |
85 to 100 |
0 to 360 |
63 to 90 |
90 to 160 |
10 to 85 |
4 HOT-DRY |
90 to 125 |
0 to 360 |
5 to 20 |
90 to 160 |
2 to 50 |
5 INTER- MEDIATE HOT-DRY |
70 to 110 |
0 to 360 |
20 to 85 |
70 to 145 |
5 to 50 |
6 INTER- MEDIATE |
-5 to -25 |
Negligible |
Tending Toward Saturation |
-10 to -30 |
Tending Toward Saturation |
7 COLD |
-25 to -50 |
Negligible |
Tending Toward Saturation |
-35 to -50 |
Tending Toward Saturation |
12
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