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Cyclic rate acceptance criteria. |
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|  MIL-C-70724(AR)
(3) The 1000 rounds shall be divided equally among 2
weapons of the type that failed testing at either -65F
or +155F. All firings must meet all acceptance
criteria of Table IV.
(4) If the 1000 rounds fired above pass all the Table IV
criteria, the remainder of the Function and Casualty
testing with that weapon, at that temperature (6500
rounds} may be conducted with only the ammunition being
temperature conditioned.
4.6.3 Cyclic rate acceptance criteria. To determine
compliance with the cyclic rate requirements, cyclic rate values
shall be averaged together as follows:
a. Starting average - All pairs of cyclic rate values taken
at the start of all 500-round segments, from the same weapon type,
at the same temperature, shall be averaged together.
b. Ending average - All pairs of cyclic rate values taken at
the end of all 500-round segments, from the same weapon type, at
the same temperature, shall be averaged together.
c. Overall average - The average of all cyclic rate values
recorded throughout the 500-round segments, as indicated on the
firing schedule for each weapon type at each temperature
condition.
d. The starting, ending, and overall averages must meet the
requirement for cyclic rate as specified for that weapon type.
4.6.4 Fouling acceptance criteria. To evaluate the effect
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of fouling on cyclic rate, the "ending average" cyclic rate shall
be compared to the "starting average" cyclic rate for each weapon
(see cyclic rate procedure). The difference shall be checked for
compliance with the requirement.
4.6.5 Cartridge ejection acceptance criteria. The
requirement shall be considered met if neither burning propellant
nor fired cartridge cases are ejected from the weapon at an
ejection angle less than 45 degrees.
4.6.6 Hot chamber effects acceptance criteria. If the
cartridge cooks off or the case does not extract properly or if
the weapon is not immediately serviceable because of some failure
of the cartridge, then the cartridge is considered to have failed
the test.
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