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AIRCRAFT-LAUNCHED SMOKE AND FLAME MARKING DEVICES - 14023_139
Launching Methods - 14023_141

Aviation Ordinanceman 2 & 3 - Aviation theories and other practices
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heavier aluminum base assembly to which the outer tube is crimped. The heavy base end causes the marker to float in the water with the chimney out of the water and the base in the water. Within the base assembly is a Mk 72 Mod 0 seawater-activated battery (two batteries in the Mod 2). The battery is shielded from water contact by two plugs fitted into 1/2-inch holes on two opposite sides of the base assembly. A rigid cover (arming plate), held in place by a retainer ring, is recessed into the base end. An arrow in the center of the arming plate indicates its safe or armed position. The words SAFE and ARMED are stamped into the base rim. Also, a machined notch in the rim at the armed position helps during night use. When the arming plate is in the safe position, it physically blocks the base plugs internally to prevent them from being accidentally pushed in. When in the armed position, the arming plate no longer blocks the base plugs, allowing them to be pushed in at the appropriate time. A black rubber G-ring circles the base assembly approximately 1/4 inch from the crimp, which holds the outer case. Functional Description To activate the seawater battery, the base plugs are pushed in before the marker is actually launched. The marker is ignited by an electric squib, and power is supplied by the seawater-activated battery (two batteries and two squibs in Mod 2). When the marker enters the water, seawater enters the battery cavity and serves as an electrolyte, causing the battery to produce a current that activates the squib. The squib ignites the starter mix, which, in turn, ignites the red phosphorous pyrotechnic composition. Gas buildup forces the valve assembly from the chimney in the nose, and yellow flame and white smoke are emitted. Burning time averages 13.5 to 18.5 minutes. Although this marker is normally used in seawater, it can be used in inland bodies of fresh water by using table salt and following the procedures outlined in Pyrotechnic, Screening, Marking, and Countermeasure Devices, NAVSEA SW050-AB-MMA-010/NAVAIR 11-15-7. REVIEW NUMBER 2 ANSWERS TO QUESTIONS Q1. THROUGH Q11. A1. A2. A3. A4. A5. A6. A7. A8. A9. A10. A11. The Mk 45 Mod 0 aircraft parachute flare is 36 inches long and approximately 4.9 inches in diameter. The Mk 364 Mod 0 fuze is used with the Mk 45 Mod 0 flare. The Mk 45 Mod 0 flare has 15 functional settings, from 1,000 to 14,000 feet in 1,000-foot increments. There is one minimum setting of 500 feet. A spring-loaded detent holds the dial indicator at a selected setting or at SAFE. The Mk 45 Mod 0 flare is initiated by exerting a force of 18 to 35 pounds to pull the internal disconnect completely out of the fuze mechanism. The LUU-2B/B aircraft parachute flare weighs about 30 pounds. The components of the LUU-2B/B flare are the mechanical timer assembly, the out-of-line igniter, the parachute suspension system and the case assembly with tamped candle. The minimum drop distance setting of the LUU-2B/B flare is 150 feet. The diameter of the parachute suspension system is 18 feet. At launch, the timer knob is pulled off of the timer by approximately 30 pounds of force on the lanyard. Using the LUU-2B/B flare instead of the Mk 45 Mod 0 flare is more advantageous because the LUU-2B/B flare candle is not ejected from the case of the LUU-2B/B. 4-10







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