MIL-PRF-71139A
3.5.14 HEI charge cook off. The cartridge propellant shall cook off prior to cook off of the high
explosive charge when left chambered in a hot gun tube for 30 minutes (see 6.19).
3.5.15 Fragmentation. The lethal area of a projectile surface burst shall be 6 to 14 square meters
against personnel using lethal area calculation procedures, 30-second defense situation, and man targets in
the prone position with winter uniform at 1000 to 3000 meters.
3.5.16 Incendiary. Functioning of the projectile shall produce an incandescent flash sufficiently
intense and sustained to cause combustion of flammable liquids and other readily ignitable materials.
3.5.17 Fuzing system. The cartridge fuzing system shall comply with the requirements of MIL-
STD-1316 and MIL-STD-331 and shall be approved by the Army Fuze Safety Review Board.
3.6 Environmental requirements.
3.6.1 Waterproofness. The cartridge shall not allow water entry into the cartridge case, projectile
body or fuze.
3.6.2 Ruggedness. The cartridge shall withstand the rigors of transportation and rough handling.
3.6.3 Salt fog. The cartridge shall show no evidence of degradation or corrosion after exposure to
the salt fog environment.
3.6.4 Humidity. The cartridge shall show no evidence of degradation or corrosion after being
subjected to the humidity environment.
3.6.5 Extreme temperature/long term storage. The cartridge shall show no evidence of
degradation after being subjected to the extreme temperature/long term storage environment.
3.6.6 Temperature shock. The cartridge shall show no evidence of degradation after being
subjected to temperature conditioning cycling.
3.7 Support and ownership.
3.7.1 Final hazard classification (FHC). The cartridge shall comply with the following hazard
classification when packaged in accordance with the requirements of the contract:
DOD Hazard Class/Div/SCG:
1.2.2E
DOT Hazard Class:
1.2E
UN Serial Number:
0321
Net Explosive Weight:
<0.30 lbs
3.7.2 Energetic material qualification. Energetic materials (such as explosives, propellants, and
pyrotechnics) shall be qualified for military use by the Army Qualification Authority (see 6.8).
3.7.3 Energetic materials compatibility. All energetic materials (such as explosives, propellants,
and pyrotechnics) utilized shall be compatible with all combinations of directly contacting energetic and
non-energetic materials. In addition, they shall be compatible with all combinations of materials that have
the potential for contact in the system life cycle (such as manufacturing environment and storage).
3.7.4 Propellant flame temperature. Propellant flame temperature shall not exceed 3100K.
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