Quantcast HANDLING AND SAFETY PRECAUTIONS - 14024_145

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impact and fuze function. Three types of signal cartridges are discussed in this section. Mk 4 Mod 3 signal cartridge. The Mk 4 Mod 3 practice bomb signal cartridge (fig. 4-13) consists of an aluminum case. The rim end has a percussion primer, and the opposite end is sealed with an aluminum disk. The cartridge produces a flash of light and a white smoke puff. The Mk 4 Mod 3 is primarily used for night operations. CXU-3/B and CXU-3A/B signal cartridges. The CXU-3/B and CXU-3A/B practice bomb signal cartridges (fig. 4-14) consists of a cylindrical aluminum case. The case is closed on one end with a percussion primer, and the opposite end is closed with a crimped-in-place aluminum cover (cap). The cartridge produces a dense, white smoke display for day missions. CXU-4/B spotting charge. The CXU-4/B spotting charge (fig. 4-15) is a fire-free signal used with practice bomb BDU 45/B to provide a daytime visual indication of bomb impact point and fuse function. Q1. Q2. Q3. Q4. Q5. REVIEW NUMBER 4 Describe the primary purpose of decoy flares. What means are used to launch the Mk 46 Mods 1, 1A, and 1C decoy flares? What cartridge is used to fire a decoy flare from a chaff dispenser? What practice bomb signal cartridge is used primarily for night operations? What practice bomb signal produces white smoke for day missions? Figure 4-13.—Practice bomb signal cartridge. Figure 4-14.—Mk 4 Mod 3, CXU-3/B, and CXU-3A/B practice bomb signal cartridge. HANDLING AND SAFETY PRECAUTIONS LEARNING OBJECTIVE: Recognize the safety precautions to follow when working with pyrotechnics. Pyrotechnic ammunition is one of the most widely used types of ammunition in naval aviation. Pyrotechnics of one type or another are carried in almost every Navy aircraft, including unarmed transport and training aircraft. All pyrotechnic and screening devices, while designed and tested to be safe under normal conditions, are subject to accidental ignition. A general rule for the handling of pyrotechnic devices is as follows: You should be constantly aware that pyrotechnics contain chemical components that are intended to burn with intense heat, and you should act accordingly. Figure 4-15.—CXU-4/B spotting charge. 4-15



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