MIL-DTL-60277B
4.2.3.3.3 Test Failure. If a test failure is attributable to an assignable cause, excluding the test initiator,
the original test results shall be discarded and that test reconducted.
TABLE II. Conditioning temperature.
Temperature (°F)
Sample size
-60 to -70
7
65 to 75
7
195 to 205
7
4.3 Test methods and procedures.
4.3.1 Breakaway torque. A torque wrench set at the torque requirement specified in 3.3 shall be used in
conjunction with a fixture to determine the adequacy of the joints. The chamber shall be secured in a
suitable vise, and the torque shall be applied to the cap.
4.3.2 Residual magnetism. The assembly shall be tested for excessive residual magnetism using an
approved compass in an area free of local magnetic effects by placing the assembly 5 inches from the end
at the same height as the compass, in a north-south horizontal position (cap end at south) with the
compass set in an east-west heading. The assembly shall be moved at a speed no greater than 10 feet per
minute past the compass for its entire length, rotated 90 degrees in the horizontal position about its
longitudinal axis, and moved slowly back past the compass. This procedure shall be repeated for each 90
degree rotation of the assembly for four full passes.
4.3.3 Functional.
4.3.3.1 Ballistics. The test sample shall be rigidly supported in the fixture and fired by a source
delivering an output of 700 + 25, - 0 psig applied at a rate between 10,000psig/sec and 50,000 psig/sec at
70 ± 5° F (see figure 1). The sample shall be tested within 5 minutes after removal from the temperature
conditioning chamber. When this time limit is exceeded, the sample units shall be reconditioned at the
original temperature.
4.3.3.2 Temperature conditioning. Each assembled initiator shall be conditioned for a period of time
not less than 4 hours nor greater than 24 hours. When reconditioning initiators at 65 ± 5 °F, all
condensation shall be removed from the interior surfaces before returning the initiator to the conditioning
chamber. Required pressure readings shall be taken as specified in 3.5.1.
4.4 Radiographic examination. All assembled initiators shall be radiographically examined in
accordance with ASTM E1742, with exception that an initiator assembly will be used for the
penetrameter. Any observable imperfections in components or assembly shall be cause for rejection. The
initiators shall be positioned for the most revealing exposure, with the long axis of each assembly
perpendicular to the rays of the X-ray machine. All initators shall be identified with serial numbers prior
to X-ray examination. The serial numbers shall be in consecutive numerical order beginning with the
number 001 in each production lot. Any missing serial numbers are to be identified on the X-rays. The
initiators shall be arranged on boards or trays in consecutive order and each radiograph shall carry a
permanent identification of the units displayed thereon. The radiographs of the entire production lot shall
accompany the ballistic sample to the activity conducting the production lot acceptance test. Defective
initiators found during X-ray review are to be marked on the X-ray prior to shipment and those defective
items shall be removed from the production lot. Film interpretation of the radiographs shall verify the
presence and correct positioning of the following parts:
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