MIL-DTL-23659F
3.5. Environmental.
3.5.1. Forty Foot Drop. To ensure fail-safe capability, the initiator shall not fire when
dropped from a height of 40 feet as specified in 4.6.1 and shall be safe for handling and disposal.
3.5.2. Six Foot Drop. The initiator shall not fire when dropped from a height of 6 Feet as
specified in 4.6.2. After being subjected to the drop test, the initiators shall meet the design
performance requirements when test fired.
3.5.3. Shock. The initiator shall be capable of withstanding shock conditions as specified
in 4.6.3. After being subject to the shock test, the initiator shall meet the design performance
requirements when test fired.
3.5.4. Vibration. The initiator shall be capable of withstanding vibration conditions as
specified in 4.6.4. After being subject to the vibration test, the initiator shall meet the design
performance requirements when test fired.
3.5.5. Temperature-Shock/Humidity/Altitude. The initiator shall be capable of
withstanding temperature-shock/humidity/altitude cycling conditions as specified in 4.6.5 and
shall meet the design performance requirements when test fired.
3.5.6. Cook-Off. The maximum temperature to which an initiator can be exposed for a
period of one hour without cook-off shall be established (within 25° F). Test method shall be as
specified in 4.6.6.1.
3.5.7. High Temperature Exposure. The maximum temperature (within 25°F) to which
an initiator may be exposed for 12 hours and perform satisfactorily at 225°F shall be determined.
Test method shall be as specified in 4.6.6.2.
3.5.8. Salt Fog. The initiator shall meet the salt fog test as specified in 4.6.7. After being
subject to the salt fog test, the initiator shall meet the design performance requirements when test
fired.
3.6. Functional (All Fire Stimulus). The initiator shall meet the all fire stimulus
requirements of 3.4.3.3 and 3.4.3.5 at - 80° ± 5°F, + 70° ± 5°F, and + 225° ± 5°F.
3.7. Damage and Deterioration. Damage to or deterioration of any internal or external
part of the initiator which could in any manner prevent it from meeting any requirement of this
specification shall provide reason to consider the initiator as having failed to meet the test to
which it was subjected. Initiators from the 40-foot drop test shall not be subject to this
requirement.
3.8. Special requirements. Those special requirements which are in conflict with the
requirements of this specification shall be resolved in favor of the special requirements only if
necessary for satisfactory operation of the initiator in the unit of proposed use and subject to
approval by the Safety Authority. It is recognized that the maximum no-fire requirements of
section 3.4.3 cannot be imposed on all weapons systems because of limited power supplies or
dimensional requirements which limit the ability of the initiator to dissipate one watt for 5
minutes. Where the maximum no-fire requirements of 3.4.3 are irreconcilable with the available
power supply or dimensional requirements, the contractor shall come as close as possible to the
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