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    #16
    A few pics.

    A couple of pics from the show,fantastic to see it running and moving let alone firing it's 88 main gun! Regards David.
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      #17
      Great pics David!

      And let's not forget that both the exhaust gases and the powder residue flying out from the barrel also have mass and speed and thus play a part in recoil impulse as per Newton's third law of motion. Otherwise you wouldn't have much use for the muzzle break in that 8,8 cm KwK

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        #18
        Purpose of muzzle break is "fine tuning" regarding recoil and accuracy.

        Lets off some of the pressure at a calculated rate and time.
        You want no movement until the projectile has left the tube.

        Fire a blank in a pistol or rifle-no recoil felt.

        They get them to fire auto by placing restrictors in the muzzle and weakened springs in actions.
        MLP

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          #19
          Originally posted by MikeP View Post
          Purpose of muzzle break is "fine tuning" regarding recoil and accuracy.
          No fence Mike, but you have some learning to do regarding weapon systems engineering. All normal guns are rather simple thermodynamical systems and all elementary physics apply to them.

          As dictated by the mass–energy equivalence, only a tiny fraction of the mass of the propellant charge turns in to energy (heat+work) during the firing cycle of the gun. Thus almost all of this mass shoots out from the barrel as high speed gases and high speed powder residue. Mass x speed = momentum.

          Now 8,8 cm KwK 43 shoots rounds with weights between 7-10 kg and uses propellant charges with weights up to a 7 kg. You'll get a major reduction in recoil if you just get some of the residue and majority of the high speed gases to turn orthogonal to the direction vector of the projectile (and thus canceling it from the forward momentum). Most reaction type muzzle breaks turn these high speed gases 120-150 degrees to the vector of the projectile, thus making them actually work against the forward momentum.

          Most large guns have a plate/flange type of muzzle break, which works on both reaction and action principles. In the action principle the expanding high speed gases apply a force to flanges, which is opposite to the force generated by the projectile.

          In real life a properly designed muzzle break in a high pressure gun reduces recoil momentum by a 30-50 %, which is quite far from "fine tuning". One could actually do much better, but with most gun systems it is often "most inconvenient" if you completely reverse the flow of the gases and residue.

          Aktivisti

          PS. Recoilless guns work only because of the same elementary physics. You just make the gases and residue to go to the exact opposite direction compared to the projectile and then use Venturi nozzles to further increase the speed of the high speed combustion gases. This way you can tune momentums completely equal and opposite -> no recoil.

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