MIL-STD-2088 Bomb Rack Unit Bru, Single Store, AircraftThis standard establishes the general guidelines and criteria for the design and development of a single store bomb rack unit BRU for carriage and release of airborne stores excluding air-to-air missiles from fixed wing and rotary wing aircraft using a single suspension point or suspension points spaced at 14 or 30 inches. This standard addresses detailed requirements for gravity non-ejected, pyrotechnic, hydraulic, and pneumatic powered BRUs. Mechanical aircraft armament interoperable interfaces are incorporated to enhance cross utilization and servicing capabilities between military aircraft and aircraft stores see 3.1 of all services of the Department of Defense DoD and North Atlantic Treaty Organization NATO nations.

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MIL-STD-2088B

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CONTENTS (Continued)

PARAGRAPH                                                                                                                        PAGE

5.1.6.3           Alternative interrupt removal ................................................................................ 28

5.1.6.4           Safety interlock ground operation ......................................................................... 28

5.1.6.5            Safety interlock control ......................................................................................... 28

5.1.6.6            Safety interlock drive mechanism ......................................................................... 28

5.1.6.7            Safety interlock override system ........................................................................... 29

5.1.6.8            Additional release operation interrupts ................................................................. 29

5.1.6.9            Frangible attach point mechanical safety .............................................................. 29

5.1.6.10          Frangible attach point electrical safety..................................................................29

5.1.7               Store release and ejection system.......................................................................... 29

5.1.7.1            Gravity release BRUs............................................................................................ 30

5.1.7.2           Pyrotechnic actuated BRUs................................................................................... 30

5.1.7.2.1         Cartridges .............................................................................................................. 30

5.1.7.2.2         Cartridge firing pin................................................................................................ 31

5.1.7.2.3         Cartridge breech .................................................................................................... 31

5.1.7.3            Pneumatic/hydraulic activated BRUs.................................................................... 32

5.1.7.3.1         Pneumatic interface ...............................................................................................34

5.1.7.3.2         Pneumatic activated BRUs with removable energy source................................... 34

5.1.7.4            Ejection force ........................................................................................................ 34

5.1.7.5            Separation parameters ........................................................................................... 35

5.1.7.6            Ejector pistons ....................................................................................................... 35

5.1.8               Safety in design .....................................................................................................35

5.1.8.1            BRU safety program.............................................................................................. 35

5.1.8.1.1         Safety program functions ...................................................................................... 35

5.1.8.1.2         Failure modes, effects and criticality analysis....................................................... 36

5.1.8.1.3        Inadvertent release................................................................................................. 36

5.1.8.1.4         Locked shut functioning........................................................................................ 36

5.1.8.1.5         Driven items .......................................................................................................... 36

5.1.8.1.6         Impulse cartridges ................................................................................................. 36

5.1.8.1.7         Pneumatic or hydraulic BRU safety requirements ................................................ 36

5.1.9              Electromagnetic environmental effects (E3)..........................................................37

5.1.9.1           Electromagnetic compatibility (EMC) program.................................................... 37

5.1.9.2           Electromagnetic interference (EMI)...................................................................... 37

5.1.9.2.1        Electromagnetic pulse (EMP) ............................................................................... 37

5.1.9.3            Electromagnetic vulnerability EMV ..................................................................... 37

5.1.9.4           Lightning protection ..............................................................................................37

5.1.9.5            Bonding and grounding ......................................................................................... 37

5.1.9.6            Static electricity..................................................................................................... 38

5.1.9.7           Hazards of electromagnetic radiation to ordnance (HERO) ................................. 38

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