MIL-DTL-83352D
6.4.2 Penetration test. One successful method of simulating a moderately dense jungle or
forest foliage is to set up a fixture consisting of three exterior, commercial grade plywood panels
spaced 3.5 to 3.75 inches apart, place this fixture a minimum of 25 feet from the launch site, and
fire the signal into the fixture. Each of the three plywood panels should be 4 feet long by 4 feet
wide by 0.25 inch thick. The signal is oriented for firing toward the approximate center of the
panels in the fixture.
6.4.3 Firing pin force (launcher). This procedure has been successfully accomplished with a
suitable test plug that will simulate the forces required to initiate the primer of the actual signal.
With the test plug installed in the launcher and the top of the test plug 0.125 inch from a self-
locking force gage (catch gage), the fully cocked firing pin is released, and the reading is
recorded. The launcher is actuated by hand.
6.4.4 Temperature and humidity test. This procedure has been successfully accomplished by
alternately exposing the signals to temperatures of -65 and +160ºF. MIL-STD-331 offers two
methods for performing this cycling. In the two-chamber method, items are moved from a cold
to a hot chamber and back. The schedule for the two-chamber method is shown in table V. In
the single-chamber method, the temperature within the chamber is changed. The schedule for
the single-chamber method is shown in table VI. In both cases, note that the schedules call for
extended periods at -65 and +160ºF. Both test methods have been modified for a minimum
temperature of -65°F.
6.4.5 Vibration test. This procedure has been successfully accomplished using the sweep
method and discrete step method. Both methods are discussed in detail in MIL-STD-331B
appendix D, paragraph 6.1
6.5
Definition of Hazardous Manner. A signal and/or launcher is considered as functioning
in a hazardous manner if the signal is held captive in the launcher while the rocket motor burns,
the signal explodes, deflagrates, or components separate or come apart within 15 feet of the
launcher, or any other abnormality that potentially could cause the operator injury.
6.6
Changes from previous issue. Marginal notations are not used in this revision to identify
changes with respect to the previous issue due to the extent of the changes.
TABLE I: Burn Time and Apogee Requirements.
Minimum
Condition Title
Condition Requirement
Display Apogee
Minimum &
Burn
Maximum (feet) Time (seconds)
Ambient
None
600 - 1,600
7.0
-65 ±5°F
Low Temperature
400 - 1,600
4.0
160 ±5°F
High Temperature
600 - 1,600
4.0
High Temp Storage After storage at 160 ±5°F for a minimum
600 - 1,600
4.0
of 28 days
Low Temp Storage After storage at -65 ±5°F for a minimum
400 - 1,600
4.0
of 28 days
10
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