MIL-P-85489(AS)
Physical properties.
TABLE II.
4.
QUALITY ASSURANCE PROVISIONS.
4.1 Responsibility for inspection. Unless otherwise specified in the
contract or purchase order (see 6.2.1), the contractor shall be responsible
for the performance of all inspection requirements as specified herein.
Except as otherwise specified, the contractor may utilize his own facil-
ities or any commercial laboratory acceptable to the Government. The
Government reserves the right to perform any of the inspections set forth
in this specification where such inspections are deemed necessary to assure
that supplies and services conform to prescribed requirements.
4.2 Sampling. Samples shall be taken from each propellant mix as
required for physical and ballistic-property testing. A minimum of
three specimens shall be tested for physical properties, and a minimum
of six strands shall be tested for ballistic properties from each mix
of propellant. Specimens shall be prepared in accordance with
MIL-STD-2126, Method II.
4.3 Physical properties. The cured propellant tensile properties
shall be determined in accordance with JANNAF Solid Propellant Mechanical
Behavior Manual (CPIA Publication 21) using class B or C specimens.
Sample preparation and data evaluation shall be in accordance with CPIA
Publication 21.
4.3.1 Specimen conditioning. Tensile specimens shall be conditioned
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for a minimum of 1 hour at 25 ± 3 C. The relative humidity of the test-
ing environment shall not exceed 50 percent. When not in specified
conditioning, the specimens shall be stored at 25 ± 3°C and a relative
humidity not exceeding 50 percent.
4.4 Ballistic properties. Burn-rate specimens shall be prepared and
inhibited in accordance with MIL-STD-2126, Method II.
4.4.1 Time recorder. The time recording device shall be capable of
measuring burning time intervals within one percent for each 3-inch
increment between fuze wires.
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