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Machine guns

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Machine guns

  1. 1. Machine GunsMachine Guns By :By : KARTHIK BABU .SKARTHIK BABU .S 11417020, S11417020, S77 MechanicalMechanical
  2. 2. IntroductionIntroduction  Most amazing, yet brutalMost amazing, yet brutal discovery of 19discovery of 19thth Century.Century.  Remarkable product of precisionRemarkable product of precision engineering.engineering.
  3. 3. BasicsBasics  Apply explosiveApply explosive pressure behindpressure behind a projectile toa projectile to launch it down alaunch it down a barrelbarrel..  Earliest, andEarliest, and simplest,simplest, application ofapplication of this idea is thethis idea is the cannoncannon
  4. 4. Modern BulletModern Bullet  A combinationA combination of a projectileof a projectile (the bullet), a(the bullet), a propellantpropellant (gunpowder, for(gunpowder, for example) and aexample) and a primer (theprimer (the explosive cap),explosive cap), all contained inall contained in one metalone metal package.package.
  5. 5. THE FIRST STEP TOWARDSTHE FIRST STEP TOWARDS AUTOMATIONAUTOMATION--RevolverRevolver  Initially, the triggerInitially, the trigger lever pushes thelever pushes the hammerhammer backward.backward.  As it movesAs it moves backward, thebackward, the hammerhammer compresses acompresses a metal spring in themetal spring in the gungun stockstock (the(the handle).handle).  At the same time,At the same time, the trigger rotatesthe trigger rotates the cylinder so thethe cylinder so the next breechnext breech chamber ischamber is positioned in frontpositioned in front of the gunof the gun barrelbarrel..
  6. 6. THE FIRST STEP TOWARDSTHE FIRST STEP TOWARDS AUTOMATIONAUTOMATION--RevolverRevolver (Contd)(Contd)  When you pull theWhen you pull the trigger all the waytrigger all the way back, the leverback, the lever releases thereleases the hammer.hammer.  The compressedThe compressed spring drives thespring drives the hammer forward.hammer forward.  The hammer slamsThe hammer slams into the primer at theinto the primer at the back of theback of the cartridge, ignitingcartridge, igniting the primer.the primer.  The primer sets offThe primer sets off the propellent.the propellent.  The explodingThe exploding propellent drives thepropellent drives the bullet out of the gunbullet out of the gun at high speed.at high speed.
  7. 7. The Machine GunThe Machine Gun  Gatling Gun-Gatling Gun- Most olderMost older and popularand popular design.design.
  8. 8. Fully Automatic Machine GunFully Automatic Machine Gun  Fully automatic machine gunFully automatic machine gun use theuse the power of the cartridge explosion topower of the cartridge explosion to reload and re-cock the gun afterreload and re-cock the gun after each shot.each shot.  There are three basic mechanismsThere are three basic mechanisms for harnessing this power:for harnessing this power: 1)Recoil systems1)Recoil systems 2)Blowback systems2)Blowback systems 3)Gas mechanisms3)Gas mechanisms
  9. 9. Recoil SystemRecoil System  A lockingA locking mechanismmechanism holds togetherholds together the barrel andthe barrel and the breach bolt.the breach bolt.  Bolt and theBolt and the barrel can movebarrel can move freely in the gunfreely in the gun housinghousing
  10. 10. Blowback SystemBlowback System  When the trigger isWhen the trigger is pulled, the searpulled, the sear releases the bolt,releases the bolt, and the springand the spring drives it forward.drives it forward.  After the boltAfter the bolt chambers thechambers the cartridge, the firingcartridge, the firing pin sets off thepin sets off the primer, whichprimer, which ignites theignites the propellantpropellant
  11. 11. Blowback SystemBlowback System  TheThe explosiveexplosive gasgas from thefrom the cartridge drives thecartridge drives the bullet down thebullet down the barrel. At the samebarrel. At the same time, the gastime, the gas pressure pushes inpressure pushes in the oppositethe opposite direction, forcingdirection, forcing the bolt backward.the bolt backward.
  12. 12. Gas SystemGas System  Similar toSimilar to Blowback system.Blowback system.  The main additionThe main addition is a narrowis a narrow pistonpiston,, attached to theattached to the bolt, that slidesbolt, that slides back and forth in aback and forth in a cylinder positionedcylinder positioned above the gunabove the gun barrelbarrel
  13. 13. Automatic BULLET FEEDAutomatic BULLET FEED
  14. 14. Thank You…Thank You…

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