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High temperature, diurnal cycle and high humidity |
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|  MIL-V-85830(AS)
4.8.4.8 Normal acceleration. The ventilator shall be subjected to the
acceleration test as specified in MIL-STD-81O, Method 513.3, Procedure II,
Operation. The acceleration shall be six g's for the test in each of six
The acceleration test shall be conducted with the ventilator
directions.
delivering an air flow of 2.7 + .2 cubic feet per minute at the outlet of the
air supply hose. The pressure-at the outlet of the air supply hose shall be
recorded both before and after each acceleration test. The pressure shall be
within the limits per Figure 3. The ventilator shall meet the requirements
specified in 3.9.10 and 3.9.10.8.
4.8.4.9 High temperature, diurnal cycle and high humidity.
The
ventilator shall be tested as specified In MIL-STD-810, Method 507.2,
Procedure II, Cycle 4, normal test duration. The ventilator shall be examined
every five days and shall meet the requirements specified in 3.9.10 and
3.9.10.9.
4.8.4.10 Shock. The ventilator shall be tested as specified in
MIL-STD-81O, Method 516.3, Procedure IV, Transit Drop. The ventilator shall
be dropped on each of its six major faces with its lower surface 48 inches
above a flat concrete surface. The ventilator shall be dropped six times with
a battery. After each drop, the ventilator shall meet the requirements
specified in 3.9.10 and 3.9.10.10.
4.8.4.11 Vibration. The ventilator shall be tested as specified in
MIL-STD-81O, Method 514.3, Category 6 Equipment, general location for AH-1 and
UH-1 rotary wing aircraft, main rotor source frequency zone. The ventilator
shall be mounted in the mount assembly NAVAIR 1605AS41O. External power shall
be connected at the external connector. The motor switch shall be selected to
the "ON" position. The test duration shall be seven hours for seven cycles in
each of three axis. The ventilator shall meet the requirements specified in
3.9.10 and 3.9.10.11.
4.8.5 Battery tests. Batteries shall be climatized at 68 degrees F (20
degrees C) for 16 hours prior to each test.
4.8.5.1 Temperate operations.
4.8.5. 1.1 Temperate operations (high). A fresh battery shall be installed
in the ventilator and the battery compartment shall be closed. The ventilator
shall be placed in the climatic chamber maintained at 122 degrees F (50
degrees C). The ventilator motor shall be switched "ON" and operate for 4
hours. The minimum flow measured at the end of the delivery hose shall be as
specified in 3.10.4.3.1.
4.8. 5.1.2 Temperate operations (low). A fresh battery shall be installed
in the ventilator and the battery compartment shall be closed. The ventilator
shall be placed in the climatic chamber maintained at 41 degrees F (5 degrees
C). The ventilator motor shall be switched "ON" and operate for 4 hours, The
minimum flow measured at the end of the delivery hose shall be as specified in
3.10.4.3.1.
4.8.5.2 Cold weather operations.
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