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Firing Components - 14024_158
REVIEW NUMBER 3 ANSWERS TO QUESTIONS Q1. THROUGH Q9.

Aviation Ordinanceman 1 - Aviation theories and other practices
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entering the water. The parachute reduces the impact velocity and protects the mine components from damage. The use of parachute packs permits the mines to be released from an aircraft at high altitudes, which may be required when ports or sea passages are heavily armed. The parachute pack currently used is the delayed-opening type. In this type of parachute pack, a control mechanism is used to open the parachute at some point in the air trajectory of the mine. A typical delayed-opening parachute pack contains a drogue-type parachute, release gear, and a control device. The parachute release gear consists of a metal ring that attaches the parachute to the mine during air travel. It is released from the mine upon water impact by inertia weights, wipe-off plates, or hydrostatic mechanisms. The control device opens the parachute during the mine’s descent. It is usually controlled by an adjustable fixed-delay device. Since the parachute is deployed by firing an explosive fitting, parachute pack control devices contain explosive components. REVIEW NUMBER 3 Q1. What element of a mine carries all other components? Q2. List the explosive components of a mine. Q3. Q4. Q5. Q6. Q7. Q8. Q9. What amount of explosives are used in air-laid mines ? After a mine is planted, what device prevents the mine from firing until it has been submerged for a predetermined time? What is the range of the delay time in planted air-laid mines? List the influence-actuated firing mechanisms. What type of mine is detonated by the sound waves generated by nearby ships’ rotating screws? What force actuates the pressure mine? What actuates the magnetic type of mine ? OPERATIONAL AIRCRAFT MINES Air-laid mines currently in operational use are discussed briefly in the following paragraphs. Mk 55 Mine The Mk 55 service mine and the Mk 55 exercise mine (fig. 5-11 ) are air-laid bottom mines. Each mine is fitted with a nose fairing and box fins for drop stability. Each is suspended from the aircraft by two Figure 5-11.—Mk 55 service and Mk 55 exercise mine. 5-11







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