MIL-DTL-70526B (AR)
3.3 Ammunition lot numbering. Ammunition lot numbers shall
be assigned in accordance with MIL-STD-1168.
3.4 Pyrotechnic composition, total volatiles. The total
volatiles of the flash, delay and igniter composition at the
time of loading shall not exceed 0.10 percent. The flash, delay
and igniter compositions shall comply with dwg. 12926809.
3.5 Crimp strength. The washer crimp shall be capable of
withstanding a 500 pound minimum load.
3.6 Pyrotechnic porosity test. The pressure recorded at the
exit end of the delay assembly; 80 seconds after application of
the nitrogen gas shall not exceed 9 PSIG above the zero
reference. The pressure recorded at the exit end of the delay
assembly 110 seconds after application of the nitrogen gas shall
be no greater than 19 PSIG above the zero reference.
3.7 Radiographic inspection. The delay column shall not be
missing or be short in length. There shall be no voids or low
density areas in the area of individual increments in the delay
column. There shall be no evidence of aluminum slivers in the
delay column. The flash or igniter composition shall not be
missing. The boron potassium nitrate pellets shall not be
missing, contain voids greater than 1/64th square inch, or have
a gap between the top of the closure greater than 1/8th inch.
The delay washer shall not be missing.
3.8 Performance. (See 6.22 for definitions).
3.8.1 Pilot composition. The pilot composition shall be
acceptable when the ballistic delay burn times of the pilot
composition batches show that the required burn time of 15.25 +
.75 seconds at 70 degrees F is met by at least one batch or is
bracketed by at least one batch on the high and low ends so that
an optimal burn time fuel ratio may be determined. The standard
deviation of the batch(es) meeting the requirement shall not
exceed .62 seconds when ballistically tested at 70 degrees F in
accordance with 4.4.7. When ballistically tested at -50 degrees
F, the delay shall function to the extent that it ignites the
rocket motor. During static spin testing, the samples shall not
contain any long burn time statistical outliers. The results
shall be used to set the fuel level for production. (See 6.17)
3.8.2 Delay composition. Each lot of delay composition
shall be ballistically tested at 70 degrees F and -50 degrees F.
The production batch shall have a mean time of 15.25 + .75
seconds and a standard deviation no greater than .62 seconds
when ballistically tested at 70 degrees F. For -50 degree F
testing, the delays shall function properly to the extent it
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