Machine GunsMachine Guns

By :By : KARTHIK BABU .SKARTHIK BABU .S 11417020, S11417020, S77 Mechanical Mechanical

IntroductionIntroduction

Most amazing, yet brutal Most amazing, yet brutal discovery of 19discovery of 19thth Century. Century.

Remarkable product of precision Remarkable product of precision engineering.engineering.

BasicsBasics

Apply explosive Apply explosive pressure behind pressure behind a projectile to a projectile to launch it down a launch it down a barrelbarrel..

Earliest, and Earliest, and simplest, simplest, application of application of this idea is the this idea is the cannoncannon

Modern BulletModern Bullet

A combination A combination of a projectile of a projectile (the bullet), a (the bullet), a propellant propellant (gunpowder, for (gunpowder, for example) and a example) and a primer (the primer (the explosive cap), explosive cap), all contained in all contained in one metal one metal package.package.

THE FIRST STEP TOWARDSTHE FIRST STEP TOWARDS AUTOMATION AUTOMATION--RevolverRevolver

Initially, the trigger Initially, the trigger lever pushes the lever pushes the hammerhammer backward. backward.

As it moves As it moves backward, the backward, the hammer hammer compresses a compresses a metal spring in the metal spring in the gun gun stockstock (the (the handle). handle).

At the same time, At the same time, the trigger rotates the trigger rotates the cylinder so the the cylinder so the next breech next breech chamber is chamber is positioned in front positioned in front of the gun of the gun barrelbarrel. .

THE FIRST STEP TOWARDSTHE FIRST STEP TOWARDS AUTOMATION AUTOMATION--RevolverRevolver (Contd) (Contd) When you pull the When you pull the

trigger all the way trigger all the way back, the lever back, the lever releases the releases the hammer. hammer.

The compressed The compressed spring drives the spring drives the hammer forward. hammer forward.

The hammer slams The hammer slams into the primer at the into the primer at the back of the back of the cartridge, igniting cartridge, igniting the primer. the primer.

The primer sets off The primer sets off the propellent. the propellent.

The exploding The exploding propellent drives the propellent drives the bullet out of the gun bullet out of the gun at high speed. at high speed.

The Machine GunThe Machine Gun

Gatling Gun- Gatling Gun- Most older Most older and popular and popular design.design.

Fully Automatic Machine GunFully Automatic Machine Gun

Fully automatic machine gun Fully automatic machine gun use the use the power of the cartridge explosion to power of the cartridge explosion to reload and re-cock the gun after reload and re-cock the gun after each shot.each shot.

There are three basic mechanisms There are three basic mechanisms for harnessing this power: for harnessing this power:

1)Recoil systems 1)Recoil systems 2)Blowback systems 2)Blowback systems 3)Gas mechanisms 3)Gas mechanisms

Recoil System Recoil System

A locking A locking mechanism mechanism holds together holds together the barrel and the barrel and the breach bolt.the breach bolt.

Bolt and the Bolt and the barrel can move barrel can move freely in the gun freely in the gun housinghousing

Blowback SystemBlowback System

When the trigger is When the trigger is pulled, the sear pulled, the sear releases the bolt, releases the bolt, and the spring and the spring drives it forward. drives it forward.

After the bolt After the bolt chambers the chambers the cartridge, the firing cartridge, the firing pin sets off the pin sets off the primer, which primer, which ignites the ignites the propellantpropellant

Blowback SystemBlowback System

The The explosive explosive gasgas from the from the cartridge drives the cartridge drives the bullet down the bullet down the barrel. At the same barrel. At the same time, the gas time, the gas pressure pushes in pressure pushes in the opposite the opposite direction, forcing direction, forcing the bolt backward.the bolt backward.

Gas SystemGas System

Similar to Similar to Blowback system.Blowback system.

The main addition The main addition is a narrow is a narrow pistonpiston, , attached to the attached to the bolt, that slides bolt, that slides back and forth in a back and forth in a cylinder positioned cylinder positioned above the gun above the gun barrelbarrel

Automatic BULLET FEEDAutomatic BULLET FEED

Thank You…Thank You…