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5.0-INCH (SERIES) LAUNCHERS - 14313_69
MK III ROCKET LAUNCHER TESTER

Aviation Ordinanceman - Aviation theories and other practices
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(fig. 2-18). When the rocket is loaded and unloaded, a detent lift tool is used to raise and lower the detent pawl by rotating the detent lift handle, which is located at the forward end of the launcher. The detent also supports the firing pin. Each firing pin (fig. 2-18) is part of the detent assembly and is raised and lowered concurrent with the pawl. The firing pin extends into the tube and contacts the rocket firing contact band, which is located aft of the rocket detent groove. When  the  switch  in  the  aircraft  firing  circuit  is closed, electrical current flows from the aircraft firing circuit through the electrical receptacle, safety switch, mode selector switch, intervalometer, and the firing pin in the launcher to the contact band in the forward end of the motor, and through the lead wire to the squib in the igniter. The current entering the rocket squib heats the squib primer mixture, which, in turn, ignites the igniter charge. Pressure within the igniter unseats a blowout plug, permitting  the  burning  charge  to  ignite  the  propellant grain.  The  whole  process  of  ignition  requires  about 0.005 second. Pressure of the hot propellant gases from the burning grain bursts the nozzle seal and provides the thrust to propel the rocket. Thrust overrides the detent spring,   releasing   the   pawl   from   the   rocket   detent groove.   The   thrust   then   pushes   the   rocket   out   the forward  end  of  the  tube.  The  impact  from  the  first rocket  out  shatters  the  forward  fairing  and  the  blast removes the tail fairing. 2.75-INCH (SERIES) LAUNCHERS The  2.75-inch  (series)  launchers  are  intended  for shipping   (in   some   cases,   with   warheads   installed) stowing, and firing the 2.75-inch rockets. The weight of loaded launchers varies, depending upon the number of rockets installed and rocket configuration. The   rockets   are   retained   in   the   launcher   tubes during shipping, handling, and flight by engagement of a leaf-spring type of detent with integral blast paddles (fig. 2-19). During loading, the rocket motor depresses the detent until the detent snaps into the detent grooves located on the aft end of the motor. To remove rocket motors, use a rocket loading and release tool to depress 2-18 Figure 2-18.—LAU-10 (series) detent pin and firing pin assembly. Figure 2-19.—Rocket launcher detent (2.75-inch).







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