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Page Title:
Temperature conditioning for ballistic test. |
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|  MIL-D-60873A
inspection conditions shall be as follows:
a.
Temperature: Room ambient 20 to 25 C (68 to 77 F)
b.
Altitude: Sea level
c.
Humidity: 50 percent relative, maximum
d.
Atmospheric: 14.7 psia
4.4 First article inspection. At the beginning of regular production, the contractor shall submit a first
article sample to a Government approved facility for evaluation. The sample shall consist of 10 delay bodies,
10 primer retainers, 21 units for ballistics, to be tested as indicated in table II, and 10 sets of unassembled
components (including explosive components) for visual and dimensional examination. The first article
sample shall be manufactured using the same materials, equipment, processes, and procedures as used in
regular production. All parts and materials, including packaging and packing, shall be the same as used for
regular production and shall be obtained from the same source of supply. When it becomes necessary to make
a change in either the primer, propellant, or igniter lot after initial production, 12 assembled delay elements
from the first production lot thereafter shall be tested in accordance with 4.7.5. The Government reserves the
right to require new first article samples until such time as an acceptable sample is submitted (see 6.3).
TABLE II. First article inspection.
Paragraph
Type of test
Test
Sample size
Requirement
Test
Destructive
Nondestructive
3.4.2
4.7.2
Protective
10 Delay bodies
X
-
finish
X
-
10 Primer retainers
3.5.2
4.7.4
Vibration
12
-
X
(from ballistics
sample)
3.6
4.7.5
Function tests
21
X
-
4.4.1 Examination, tests, and facility. After provisional acceptance at source, the sample shall be
inspected for all requirements of the drawings and specifications at a Government laboratory or other such
facility specified in the contract (see 6.2).
4.4.2 Temperature conditioning for ballistic test. The sample shall be temperature conditioned and
tested to determine compliance with 3.6.1.2. The sample for firing shall be conditioned to table III.
TABLE III. Temperature conditioning.
Temperature ( F)
Not vibrated
Vibrated
-60 to -70
3
4
5
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