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|  MIL-C-64037 (AR)
4.4.3.3 Cavitation (see 3.8) Major defect. The sampling
plan and procedure for this test shall be in accordance with
MIL-STD-1235 using CSP-2 plan having the following parameters;
i value shall be 144, f value shall be 1/24, and the S value
shall be 1800. Any cartridge having cavitation in excess of
that permitted by the applicable requirement for any segment
shall be classed defective. The test shall be performed as
specified in 4.5.3.
4.4.4 Inspection equipment. The inspection equipment
required to perform the examination and tests prescribed herein
is described in the "Paragraph Reference/Inspection Method"
column in the tables starting with paragraph 4.4.2.1. The
contractor shall submit for approval inspection equipment
designs in accordance with the terms of the contract. See
section 6 of MIL-A-48078 and 6.2 herein.
4.5
Test methods and procedures.
4.5.1 Air leakage test. The shipping and storage
containers shall be tested in accordance with drawing 9246386.
4.5.2 Proving ground test. The test shall be performed at
a Government Proving Ground in accordance with the applicable
USATECOM Acceptance Test Procedure.
The cartridges for first article testing shall be separated
into three equal groups; one group conditioned for 24 hours at
plus 145F 2.5F, one group conditioned for 24 hours at
plus 70F 2.5F, and one group conditioned for 24 hours
minus 50F 2.5F. Each group shall be separated into
three equal subgroups; one subgroup tested at charge zero, one
subgroup tested at charge two, and one subgroup tested at
charge four.
The cartridges for production lot acceptance shall be
conditioned at 70F 2.5F. The sample for the first
three production lots (90) shall be separated into three equal
groups; one group tested at charge zero, one group tested at
charge two, and one group tested at charge four.
After three consecutive lots have complied with the
acceptance requirements, the production lot sample (48) shall
be separated into two groups; one group tested at charge zero,
and one group tested at charge four.
The cartridge shall be fired from a standard 60MM LWCMS
M224 (or equivalent ballistic tube) mortar at an elevation of
forty-five degrees from a hard mount (a solid base test
fixture) within two minutes after removal from the conditioning
chamber. All fuzes shall be set for impact functioning. The
individual velocities, pressures, deflections, and ranges shall
be recorded on the firing record.
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