 |
|||
|
|
|||
| ||||||||||
|
|  MIL-C-70690 (AR)
4.3.4 Testing. The tests listed in Table I shall be
performed on each cartridge lot in accordance with the test
methods prescribed in section 4.4. Unless otherwise indicated,
tests shall be conducted with samples at 20C 10C. Sample
size and acceptance criteria for each test shall be as specified.
only cartridges having met the visual and dimensional requirements
and having been selected in such a manner that the sample is
representative of the entire lot shall be used in the tests. The
selected cartridges shall be thoroughly mixed before being divided
into samples for the various tests. The combining of tests is
permitted (see 6.4).
4.3.4.1 Firing defects and casualties. Firing defects and
associated criteria shall be as specified in Table II. For the
defect definitions, see AS12013566.
4.3.4.2 Unlisted firing defects. The lot shall be suspended
and referred to the contracting officer for disposition, if a
malfunction or casualty not covered by this specification
occurring in any firing test, indicates that the product may be
unsuitable for the purpose intended.
4.3.5 Packaging, packing and marking inspection. MIL-STD-644
shall be used as a guide for inspection of packaging, packing and
marking as applicable to Dwg. 12013674.
4.3.6 Inspection equipment. Inspection equipment required to
perform examinations and tests prescribed herein shall conform to
the provisions of MIL-A-48078.
4.4 Methods of inspection.
The method shall be as
4.4.1 Projectile extraction.
prescribed in AS12023566.
4.4.2 Propellant contamination. The propellant from each of
the cartridges will be examined visually and chemically for
contamination, as prescribed in AS12013566.
4.4.3 Projectile torque. Each cartridge of the test sample
shall be marked axially across the rotating band onto the case
neck. Torque, to the specified requirement, shall be applied
slowly to the projectile. Movement of the projectile with respect
to the cartridge case detectable by misalignment in the scratch
mark, shall be recorded.
4.4.4 Velocity and pressure. The methods of test shall be as
prescribed in AS12013566. Statistics necessary for testing of
results against acceptable criteria shall be computed (see 6.3).
A correction factor of 0.46 mps per meter shall be applied to the
recorded velocity at the measured range to obtain muzzle velocity.
11
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals