Machine Gun Working by avsdigg

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									Machine Guns
By :

ANISHBHANU S S 7 MECHANICAL ROLL NO 05 419007 PAACET

Introduction
• Most amazing, yet brutal discovery of 19th Century. • Remarkable product of precision engineering.

Basics
• Apply explosive pressure behind a projectile to launch it down a barrel. • Earliest, and simplest, application of this idea is the cannon

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

THE FIRST STEP TOWARDS AUTOMATION-Revolver
• • Initially, the trigger lever pushes the hammer backward. As it moves backward, the hammer compresses a metal spring in the gun stock (the handle). At the same time, the trigger rotates the cylinder so the next breech chamber is positioned in front of the gun barrel.

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THE FIRST STEP TOWARDS AUTOMATION-Revolver (Contd)
• • • • • When you pull the trigger all the way back, the lever releases the hammer. The compressed spring drives the hammer forward. The hammer slams into the primer at the back of the cartridge, igniting the primer. The primer sets off the propellent. The exploding propellent drives the bullet out of the gun at high speed.

The Machine Gun

• Gatling Gun- Most older and popular design.

Fully Automatic Machine Gun
• Fully automatic machine gun use the power of the cartridge explosion to reload and re-cock the gun after each shot. • There are three basic mechanisms for harnessing this power: 1)Recoil systems 2)Blowback systems 3)Gas mechanisms

Recoil System
• A locking mechanism holds together the barrel and the breach bolt. • Bolt and the barrel can move freely in the gun housing

Blowback System
• When the trigger is pulled, the sear releases the bolt, and the spring drives it forward. • After the bolt chambers the cartridge, the firing pin sets off the primer, which ignites the propellant

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

Gas System
• Similar to Blowback system. • The main addition is a narrow piston, attached to the bolt, that slides back and forth in a cylinder positioned above the gun barrel

Automatic BULLET FEED

Conclusion
• Machine gun had been one of the most important military developments in the history of man. It has been the reason behind the fall of many nations, repressing revolutions, overthrowing governments and ending wars. • Gun manufacturers are continually adding new modifications to machine guns, but the basic mechanism has remained the same for more than a hundred years. Some of the modern machine guns can be fired using a remote control.

Thank You…


								
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