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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46 - 47 - 48 - 49 - 50 - 51 - 52

MIL-STD-2088B

w/CHANGE 1

4.2.1.1 Metal parts. All metal parts shall be of the corrosion resistant type or treated in a manner to render them resistant to corrosion. Materials listed in MIL-HDBK-1587, Table 1 shall not be used. Unless protected against electrolytic corrosion, dissimilar metals, as specified in MIL-STD-889, shall not be used in contact with each other. General design information governing usage of metals shall be as provided in DOT/FAA/AR-MMPDS.

4.2.1.1.1 Heat treatment. Heat treatment of aluminum, steel, and titanium parts shall be in accordance with SAE AMS-H-6088, SAE AMS-H-6875, and SAE AMS-H-81200 respectively.

4.2.1.1.2 Castings. Castings shall conform to the requirements of SAE AMS2175 with appropriate class, grade, and critical area notations. Aluminum alloy castings, used in critical strength applications, shall conform to the requirements of SAE AMS-A-21180.

4.2.1.1.3 Forgings. Forgings shall conform to the requirements of SAE AMS-F-7190, SAE AMS4931, SAE AMS4965, SAE AMS-T-9047, or SAE AMS-QQ-A-367 with appropriate

grade and grain flow notations. Forgings, used in critical strength applications, shall conform to the requirements of SAE AMS-F-7190 Grade A or SAE AMS-A-22771.

4.2.1.2 Non-metallic components. Non-metallic components shall be designed for minimum deterioration caused by abrasion, exposure to sunlight, microorganisms, moisture, temperature extremes, fuel, hydraulic and lubricating oil, grease, and salt spray. Protection shall be provided for those non-metallic components that can endanger or jeopardize the function of the BRU due to strength degradation associated with abrasion, load or exposure-induced deterioration.

4.2.1.2.1 Reinforced plastic and structural composites. The use of structural composites and/or plastic, if required, shall be as specified for Type I materials in L-P-383 or meet the applicable requirements for fibrous composite construction in JSSG-2006. MIL-HDBK-17/1 shall be used where applicable for material and fabrication processing guidelines. The material and configuration design shall be of such character and quality as to be capable of withstanding all service conditions, as specified herein, without degrading the performance of other components of the BRU or surrounding materials.

4.2.1.3 Lubrication. Lubricants and lubrication practices shall conform to the requirements of MIL-HDBK-838 and MIL-PRF-46010. Lubricants shall function satisfactorily throughout

the temperature range from -70 to +200° F. Choice of lubricants shall: (a) be compatible with non-metallic components, (b) not damage finishes adjacent to location of lubricant application, and (c) eliminate the need for frequent lubrication by field maintenance activities. If lubrication is required, choice of lubricants and practices shall be such that lubrication need be accomplished only during post deployment intermediate level maintenance (see 4.3.11.4.2).