MIL-DTL-10058J
4.7.2.2.2 Composition of BP/Al flash powder. Transfer an accurately weighed portion of
approximately 2 grams of the flash powder that was dried for the moisture determination to a
tared crucible. Wash the sample between 10 and 15 times with 5 milliliter (mL) portions of cold
carbon disulfide and rinse with ether. Continue washing the sample with fifteen (15), 20 mL
portions of cold distilled water, allowing each wash of the water to remain in contact with the
sample approximately 1 minute before applying suction. Aspirate the crucible and contents
thoroughly, and dry in an oven maintained at a temperature of 100°C + 5°C. The crucible and
contents shall be cooled in a desiccator and weighed. To the contents remaining in the crucible
add several portions of hot, dilute hydrochloric acid until the reaction subsides. After all reaction
has ceased, wash the residue with several portions of hot water. Dry the crucible and contents in
the 100°C + 5°C oven and then cool in a desiccator and weigh. Calculate the percent of
aluminum as follows:
Percent aluminum = (A B) * 100
W
Where:
A = weight of crucible and contents after the carbon disulfide and water extraction, in grams.
B = Weight of crucible and contents after the acid extraction, in grams.
W = Weight of the sample, in grams.
Determine the percentage of black powder by subtracting the percent of aluminum from 100.0
percent.
When blending is accomplished in individual charge cases, the adequacy of the composition may
be determined by emptying one or more of the partially mixed charges from the charge cases
before they have been closed, blending the ingredients and performing and analysis on the
sample of the mixture.
4.7.3 Jumble. The simulator assemblies shall be tested in accordance with procedures
specified in MIL-STD-331, except that the duration of the test shall be limited to a minimum of
20 minutes. The assemblies and equipment shall be observed and inspected for compliance with
paragraph 3.4.
4.7.4 Conditioning requirements.
4.7.4.1 Ambient temperature - (70°F ± 5°). The simulator assemblies shall be
conditioned for not less than twenty-four (24) hours at the specified ambient temperatures. At
the end of the conditioning period, the assemblies shall be tested in the following manner within
30 minutes after removal from the conditioning chamber. The functioning performance shall be
observed for compliance with the requirements.
4.7.4.1.1 Static. The assemblies, conditioned at ambient temperature, shall be mounted
horizontally on a rigid horizontal support and fired by means of a lanyard attached to the fuze
igniter cord. The assembly shall not be shaken or agitated in any manner other than normal
handling within two (2) hours prior to test. Measuring of sound level intensity shall be
30
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