Railgun

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Railgun:

Railgun Introduction:- A railgun is an entirely electrical gun that accelerates a conductive projectile along a pair of metal rails using the same principles as the homopolar motor .

Slide 2:

A rail gun is basically a large electric circuit, made up of three parts: a power source, a pair of parallel rails and a moving armature. The power supply:- is simply a source of electric current Typically, the current used in medium- to large-caliber rail guns is in the millions of amps.

Slide 3:

The rails:- are lengths of conductive metal, such as copper. They can range from four to 30 feet (9 meters) long. The armature:- bridges the gap between the rails. Railguns use two sliding or rolling contacts that permit a large electric current to pass through the projectile. This current interacts with the strong magnetic fields generated by the rails and this accelerates the projectile.

The structure :

The structure The structure of a rail gun is quite simple. First there is the power supply. Preferably the power source produces an alternating current. The next part are the rails. The rails are conductive with one side being positive and the other being negative.

Slide 5:

Last of all is the projectile itself. It has a bar called an armature which will connect the projectile to both sides of the rails so that current can be conducted. The current then creates the magnetic field that will fire the projectile. Advantages:- A rail gun has many advantages as well as draw backs. there is the speed. A rail gun can fire projectile at speeds exceeding 3500 meters per second.

Slide 6:

A rail gun is a huge piece of artillery. It shoots really really big shells really really far. A very long rail gun, or mass driver , could be used to accelerate payloads to escape velocity for costs far cheaper than that of chemical rockets . a rail gun was purely a futuristic weapon in science fiction movies and video games. .

Slide 7:

Many millions of dollars have been put into rail gun research by the United States military, and many successful prototypes have been developed, which possess very high muzzle speeds, on the order of 3.5 km/sec (2.17 mps), roughly 3 times faster than modern rifles.

Theory:-:

Theory:- A rail gun consists of two firmly anchored parallel metal rails, connected to an electric power supply. A projectile capable of conducting electricity is placed in between the rails, completing the circuit. Being electrically charged, the metal rails behave as electromagnets, creating a magnetic field that circulates around each rail.

Slide 9:

The projectile behaves like any charged wire in an electric field, experiencing a force perpendicular to the direction of the current and the direction of the magnetic field. This is called the Lorentz force. The rails also repel themselves via a sideways force caused by the rails being pushed by the magnetic field, just as the projectile is. The rails need to survive this without bending, and must be very securely mounted.

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