MIL-STD-2088B
and off-loading or related equipment attachment or installation points shall be clearly marked and identified as to proper usage. For Navy aircraft applications, any BRU loading attachments or hoisting components shall be capable of withstanding a vertical limit loading of + 2.67 g and carrier roll rates of ±20° per second with a 17 second period and pitch of ±3° with an 8 second period. BRU/store interface shall be compatible with the controls, load application range, and operational requirements of current applicable U.S. inventory support equipment including Single Hoist Ordnance Loading System (SHOLS) (see MIL-I-8671). In addition, for all DoD
Services the interface shall provide compatibility with manual loading equipment such that stores up to and including the 1,000 pound class can be loaded rapidly and safely with a minimum of personnel and without special tools or equipment. All connections or disconnections, i.e.,
arming wire installation, cartridge installation, fuzing connections, and safety interlock function required during this sequence of events, shall be accomplished after the store is structurally attached to the BRU without releasing the store attachment (see AIR STD 20/17).
5.1.1 Support Equipment (SE). The BRU shall be designed to be installed, tested, serviced and maintained using standard support equipment and hand tools. Use of common hand tools shall be maximized. All support equipment shall be identified and grouped by maintenance level organizational and intermediate).
5.1.2 Store vertical support. The BRU vertical support system shall consist of 14-inch or
30-inch vertical supports to accommodate stores up to 5000 lbs for two-piston BRUs (U.S. Air Force and U.S. Navy), or up to 2000 lbs for single-piston BRUs (U.S. Army), through the interfaces specified in MIL-STD-8591. The vertical supports shall be located as shown on Figures 1 and 2 for two-piston BRUs and Figure 3 for single-piston BRUs. BRU lower surface to store upper surface clearance shall be as specified in MIL-STD-8591 (STANAG 3575 and AIR STD 20/10).
5.1.2.1 Vertical support latching. Latch mechanisms shall be used to secure the vertical supports in their captive positions. The engagement of the vertical support latches shall be automatic as the store suspension lugs engage the vertical supports, and each latch shall independently engage its vertical support as the store is loaded onto the BRU. The latch mechanism design shall incorporate a latch drive that will force the latch mechanism from its LATCHED to UNLATCHED positions. The latch drive shall operate as part of the normal aircraft release operation or be manually driven during loading or downloading of stores. Latches shall dependently and simultaneously disengage all vertical support during store release operations. After store release, the vertical supports and latch mechanisms shall automatically engage and latch during the next store loading operations without additional actions of the loading crew. Vertical supports and latches shall be designed so that they will not latch unless the vertical supports are properly placed in their captive positions. The BRU vertical supports
and their latching mechanisms shall be designed such that the vertical supports are either latched or unlatched and cannot be placed in an in-between state where the vertical supports are partially latched. The latch mechanism shall provide a positive indication of its latched or unlatched state and shall not be capable of providing a false latched indication. The latch state indicator shall be
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