MIL-DTL-23659F
per cent). This test shall be conducted within a period of 5 minutes subsequent to actuation of
the initiator.
4.6. Environmental Tests
4.6.1. Forty Foot Drop. To determine if the initiators meet the requirement of 3.5.1, the
forty foot drop test shall be conducted in accordance with test method 103 of MIL-STD-331
except as modified herein. Six unprotected initiators are to be dropped and impacted in each of
the following orientations:
2 unprotected initiators nose up
2 unprotected initiators nose down
2 unprotected initiators horizontal
4.6.2. Six Foot Drop. To determine if the initiators meet the requirements of 3.5.2, six
unprotected initiators are to be dropped and impacted onto a 2 inch thick steel plate imbedded
in concrete, in each of the following orientations where possible:
2 unprotected initiators nose up
2 unprotected initiators nose down
2 unprotected initiators horizontal
4.6.3. Shock. To determine if the initiators meet the shock requirement of 3.5.3, the
initiators shall be tested as follows. Initiators are to be mounted in the device of intended use or
in a suitable test vehicle. If the test is conducted using a suitable test vehicle, the degree of
support shall be the same as that afforded by the device of intended application. The shock pulse
shall be applied to the initiator's mounting points in both directions along each of three mutually
perpendicular axes. The shape of each shock pulse shall approximate as nearly as possible a half
sine wave. The amplitude of each shock pulse shall exceed 200 g's for 1.5 ± 0.4 milliseconds and
it shall exceed 65 g's for 9 ± 0.9 milliseconds. Initiators shall be free from visible damage or
leaks (if applicable), and shall perform satisfactorily in function tests subsequent to this test.
4.6.4. Vibration. To determine if the initiators meet the requirements of 3.5.4, they shall
be vibration tested per Method 514 of MIL-STD-810. If there is not adequate data to select the
method, procedure, test levels, or test duration; the following test may be used: Initiators shall be
mounted in a suitable test fixture. A resonance survey shall be conducted in each of three
mutually perpendicular axes and the resonance points noted. A vibration dwell using a 2 g input
shall be conducted for 30 minutes at each of the 4 most severe resonance points. The dwell shall
be peaked in case the resonant point shifts. After resonant dwell the initiators shall be vibration
cycled for the time shown if Table II. The vibration cycling shall be sinusoidal vibration to the
levels shown in Figure 1. The frequency shall be logarithmically swept from 5 Hz to 2000 Hz
and return to 5 Hz in 20 minutes. Vibration testing shall be conducted at -65 ºF, 70 ºF, and 200
ºF. Initiators shall be vibrated for 180 minutes in each of three mutually perpendicular axes at
each temperature.
Resonances
0
1
2
3
4
Total Dwell Time (minutes)
0
30
60
90
120
Total Cycling Time (minutes)
180
150
120
90
60
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