MIL-PRF-49151D(CR)
3.6
Environmental characteristics.
3.6.1 Temperature extremes. The adapter assembly shall not be damaged
nor suffer degradation of performance (see 3.10.1 and 3.10.4) after being
operated at temperatures of +52°C or -51°C. The adapter assembly shall not be
damaged nor suffer degradation of performance (see 3.10.1 and 3.10.4) after
being subjected to storage temperatures of +68°C or -51°C. The adapter
assembly shall not be damaged nor suffer degradation of performance (see
3.10.1 and 3.10.4) after being subjected to repetitive temperature changes
between +23°C and -51°C within 5 minutes and +23°C and +68°C within 5 minutes.
The soak time at temperature extremes shall be sufficient for the entire
adapter assembly to achieve stabilization at the specified temperature. Time
for temperature stabilization is defined as the amount of time required for
the most internal part of the unit under test to achieve the specified
temperature.
3.6.2 Humidity. The adapter assembly shall not be damaged nor suffer
degradation of performance (see 3.10.1 and 3.10.4) after being subjected to
+68°C and 94, ± 4 percent humidity.
3.6.3 Vibration. The adapter assembly shall not be damaged nor suffer
degradation of performance (see 3.10.1 and 3.10.4) after being subjected to
vibration equivalent to that encountered in tracked vehicles, during 5000
miles of operation. Vibration shall be limited to one sine sweep from 5.0 to
500 Hertz (Hz.) and back to 5.0 Hz. within 15 minutes in the in the vertical
axis only. Vibration shall be performed from 5.0 to 5.0 Hz. at 1 inch
displacement, 5.5 to 30 Hz. at 1.5 g's peak, 30 to 50 Hz. at 0.33 inch
displacement and 50 to 500 Hz. at 4.2 g's peak.
3.6.4
Shock.
3.6.4.1 Basic shock. The adapter assembly shall not be damaged nor
suffer degradation of performance (see 3.10.1 and 3.10.4) after being
subjected to a basic shock of 40g's (see 3.10.5) at 18 milliseconds duration.
3.6.4.2 Weapon shock. The adapter assembly shall not be damaged nor
suffer degradation of performance (see 3.10.1 and 3.10.4) after being
subjected to a simulated weapon firing shock of 100 g's (see 3.10.5) at 1.5
milliseconds duration, one half sine pulse.
3.7 Treatment and painting. Treatments and painting shall be in
accordance with applicable drawings unless otherwise specified in the contract
or purchase order.
3.8 Marking. Marking shall be in accordance with applicable drawings
unless otherwise specified in the contract or purchase order.
3.9 Workmanship. Standards of workmanship shall be such that the
adapter assembly will meet all requirements of this specification and any
referenced specifications or drawings.
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