MIL-STD-2088-SUP-2 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

4.2.1.8.1 Anodizing. All non-fatigue critical aluminum and aluminum alloy parts, not subject to wear, shall have anodic coatings in accordance with MIL-A-8625, type II. Aluminum and aluminum alloy parts subject to wear shall have anodic coatings in accordance with

MIL-A-8625, type III. On components where anodizing is detrimental to performance, MIL-DTL-81706 shall be used.

4.2.1.8.2 Chemical surface treatment. For aluminum and aluminum alloy parts not subject to wear, abrasion, or corrosion, chemical conversion surface treatment in accordance with

MIL-DTL-5541 may be used in lieu of anodizing.

4.2.1.8.3 Plating. Plating should be avoided. However, when required, plating of steel surfaces shall be in accordance with the requirements of MIL-S-5002 or MIL-STD-7179. Steel parts, not subject to wear, in contact with aluminum or aluminum alloys, shall be treated to prevent galvanic action, in accordance with the requirements of MIL-STD-7179.

4.2.1.9 Electrical connectors. The connectors shall contain positive mating features to indicate completed connection and to prevent accidental shorting of or damage to contacts

during mating of the plug and receptacle. Connectors shall contain peripheral grounding fingers that connect the two mating halves of the connector before pin and socket contacts make connection. The connector shall also contain provisions for terminating shield braid for electromagnetic interference protection. The aircraft, weapon and BRU sides of the electrical connection shall contain socket-type contacts and the electrical adapter harness shall contain pin- type contacts. If there is no electrical adapter harness, then the aircraft or BRU side of the electrical connection shall contain socket-type contacts, and the weapon side shall contain pin- type contacts.

4.2.1.10 Wiring. All electrical wiring shall be selected and installed in accordance with

SAE-AS50881.

4.2.1.11 Soldered or brazed connections. The soldering of contacts shall be in accordance with MIL-HDBK-454, Guideline 5, Soldering. When a brazing process is used, it shall be in accordance with AWS-C3.4, 3.5, 3.6, 3.7.

4.2.2 Drawings. Drawings shall be in accordance with ASME-Y14.100.

4.3 General design requirements.

4.3.1 BRU to aircraft installation. The BRU to aircraft installation shall not require any special tools or equipment for mating and attachment.

4.3.2 Design factors of safety.