MIL-DTL-14970D
S
=
the concentration of Composition A-5 in g/ml
of the sample injected
4.6.5 Bulk density. The bulk density shall be
determined using a 200 gram sample with a 250 ml graduated
cylinder and a 4 inch by 4 inch plywood box which is padded
on the inside surfaces with rubber foam having a density of
approximately 0.029g/ml. The top of the box shall have a
circular hole cut in the center of sufficient diameter so
that the cylindrical portion of the graduate fits easily
through it. To determine the bulk density of the sample
pass the cylindrical portion of the graduate through the
hole in the top of the box so that the base of the graduate
is in contact with the inside of the box top. Place the top
on the box enclosing the bottom portion of the graduated
cylinder inside the box. Place the box on a firm flat
surface and transfer an accurately weighed to the nearest
0.1 g portion of the sample to the graduate. Lift the
protruding portion of the graduate until the base comes into
contact with the top of the box and release allowing the
base of the graduate to strike the padded bottom of the box.
Repeat the lifting and dropping procedure until twenty drops
have been completed. Read the volume of the compacted
powder in the cylinder to the nearest ml. Calculate bulk
density in grams per ml, as follows:
Bulk density =
A
B
Where:
A = weight of powder (g)
B = volume of compacted powder (ml)
4.6.6 Granulation. Use method specified in Method
204.1 of MIL-STD-650 using the following sieves in the nest:
USS Sieve No. 12
USS Sieve No. 200
The nest of sieves shall be shaken for 3 minutes with a
mechanical shaker in accordance with local safety rules.
4.6.7 Density/sensitivity test. (See Dwg. LD549486)
A
representative sample of Explosive Composition A-5 from
4.5.3.1 shall be subjected to the procedures of the
following paragraphs:
4.6.7.1 Loading and calibration of donor assemblies.
A
minimum batch of twenty-five donor assemblies shall be
20
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