MIL-DTL-50911B
4.5. Methods of inspection.
4.5.1 Detonating fuse. The detonating fuse lot shall be verified in accordance with MIL-
DTL-17124.
4.5.2 Weight of charge. Weigh each of the marked empty booster cups to the nearest 0.1
milligram. Calculate the weights and return the sample booster cups to the regular production lot.
After loading of the booster cups, the loaded sample booster cups shall be weighed to the nearest
0.1 milligram. Calculate the weight of the booster charge as follows:
Weight = B - A
Where:
A = weight of empty booster cup
B = weight of loaded booster cup
4.5.3 Output. A sample of three (3) M112 demolition charges shall be randomly selected
from each accepted M112 lot after the charges have been packaged in charge containers. A total
of three (3) priming assemblies shall be used to test six (6) booster assemblies. The M112
demolition charge assembly shall be tested against a steel witness plate to verify effectiveness of
the priming assembly.
4.5.3.1 Priming assembly setup. The priming assembly shall be stretched into a straight
line with the clip cord placed equidistant between the two booster assemblies. A blasting cap
capable of initiating the detonating fuse shall be attached and secured to the clip cord. For each
priming assembly there are two (2) booster assemblies on each end that shall be tested. Two (2)
individual witness plates shall be used for each of the two (2) booster assemblies. Each booster
assembly shall be primed and set up in accordance with section 4.5.3.2.
4.5.3.2 Demolition charge setup. The M112 demolition charge shall be cut approximately
in half. A steel witness plate of ASTM A36 steel with dimensions of 1.0 x 10.0 x 10.0 inches
(nominal) shall be used to verify M112 detonation. The charge shall be applied to the steel
witness plate and primed at the center using the booster assembly end of the priming assembly
(part no. 9219074). The primed M112 block shall be secured with tape to ensure intimate
contact between the charge and the witness plate (see Figure 1. Test Set Up). The detonating
fuse shall be secured with tape to the witness plate. The blasting cap shall be initiated and both
booster assemblies shall completely initiate each ½ block M112 demolition charge.
4.5.3.2.1 Rejection. Failure of only one of the ½ block M112 demolition charge to cut
through or indent the steel witness plate shall result in lot rejection of the priming assembly.
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