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Digita1 display indicators - 14024_428
AN/AWW-4 Fuze Function Control System - 14024_430

Aviation Ordinanceman 1 - Aviation theories and other practices
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Digital Display Indicators The digital display indicators (DDIs) (fig. 15-16) are located on the rear cockpit instrument panel vertical consoles. The DDIs on aircraft 161354 through 163778 are connected in parallel with the DDIs in the front cockpit and respond to the last action taken by either pilot. Rear DDIs on F/A-18D 163986 and up have independent displays. Armament Computer The armament computer (fig. 15-17) is interfaced with and controlled by the mission computers. The armament computer is also interfaced with and controls the weapon station command encoders-decoders. The armament computer has a weapon insertion panel (fig. 15-18) with code wheels. These code wheels are used to enter the code into the weapon-type (ARMAMENT’) and nose or tail fuzes (FUZING). The weapon-type code must match the weapon loaded, and the nose fuze or tail fuze code must be compatible with the weapon or the armament computer won’t allow it to release normally. For weapons without nose or tail fuzes, the codes must still match the weapon loaded Digital Computers Two digital computers makeup the mission computer system and control the avionics systems. They interface with the armament computer and allow the armament computer to route power to the encoders-decoders for weapon release. The digital computers are controlled by the MC switch on the MC/HYD ISOL panel. Jettison System The jettison system gives the pilot or crew a way to jettison weapons, stores, launchers, and fuel tanks. The Figure 15-17.—Armament computer. jettison system has three modes of release-emergency jettison, selective jettison, and auxiliary jettison. The emergency jettison mode jettisons all weapons from the five pylon stations. The selective jettison mode individually jettisons the left fuselage missile, the right fuselage missile, racks, launchers, and stores. The auxiliary jettison mode is a gravity mode to jettison the five pylon stations when emergency and/or selective jettison fails. Bomb Release System The bomb release system provides the aircraft with capabilities for release of conventional weapons. The system uses the BRU-32, BRU-33, BRU-41, and BRU-42 gas ejector bomb racks for suspension and release of weapons. Normal release is provided in four electrically controlled modes of operation. The system Figure 15-18.—Weapon insertion panel. 15-17







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