Railgun

PRESENTED BY:-

SAURAV KUMAR

1113340188

ME-5 C

• WHAT IS A RAILGUN ?

• HISTORY OF RAILGUN

• HOW DOES IT WOKS ?

• BESIC PHYSICS BEHIND RAILGUN

• CURRENT RESEARCH AND DEVLOPMENT

• APPLICATION OF RAILGUNS

• ADVANTAGES/DISADVANTAGES

• LONG/SHORT TERM GOALS

• A Railgun is an electrically powered electromagnetic projectile launcher.

• As its name shows “a gun in which a pair of rails is used”.

• It is used to propel a solid slug at hypervelocity, which is capable to penetrating even the toughest enemy armor.

• It fire a conductive metal which is non–propellants based means no use of fuel or explosives.

• A Rail gun uses magnetic field created by strong electrical current to accelerate a sliding metal conductor along two rails.

• Hypervelocity electric rail guns provide revolutionary advances in lethality, range, survivability and sustainability

• First railgun idea was given by French inventor LouisOctave in 1918 by designed an electric cannon.

• In world war 2, the German Commander Luftusaffeissued a specification for a railgun based anti-aircraftgun.

• The first railgun is tested in 1970 at the AustralianNational University

• In 2003, Ian Nab plans to build a system to launchsupply into space using railgun technology

• When the projectile is inserted between rails, it complete circuit.

• When supply is given to the rails behaves as an electromegnet, creating a magnetic field inside the loop formed by length of rails up to the position of armature.

• According to the right hand rule magnetic field circulates around each conductor.

• Due to net magnetic field in rails (B) is directed at right angle to the plane formed by central axis of the rails and armature, in combination with current (I) in the armature.

• This produce Lorentz force which accelerates the projectile along the rails.

1.LORENTZ FORCE:- If a charged particle q moves with

velocity v in the presence of electric field E and a magnetic field B, then it will experience a force.

F = q(E + B x v)

qE - Electric force

qv x B – Megnetic force

2.RIGHT HAND RULE:- When a wire carrying an

electric current placed in a magnetic field the force is act at right angle of current.

•U.S. Navy has achieved a 32 MJ muzzle kinetic energy with prototype

•Current range is capable of reaching 100 nautical miles in several minutes (hypersonic)

•Maximum speed which achieved by a rail gun is 3.2 km/sec of 3.6 kg projectile.

•U.S researchers are going to launch a spacecraft using railgun technology.

• As weapon in modern warfare:-

-first military railguns will be produced for next generation of

cruisers

- projectiles using kinetic energy to destroy target

-range of railgun 2-3 times bigger than standard technologies

(Medium Range missiles) and 10 times bigger than naval cannons

•Trigger for Inertial Confinement Fusion.

•Launch or launch assist of spacecraft

• The railgun has a much larger possible power than a powder gun .

• Currently, we have been able to reach velocities around 9 km/s with the railgun; whereas, the maximum velocity a powder gun can reach is less than 8.5 km/s. It is believed that the railgun can reach up to 140 km/s.

• Since the railgun depends entirely on a massive current, there is no need for fuel or explosives. This is more efficient in three ways:

-The risk is greatly reduced for the sailors handling the weapon

systems.

-The weight of the entire system is reduced.

-The smaller size frees up a lot of space, which is crucial on

cramped battleships.

•One of the biggest problems is with maintaining the structural integrity of the rails as they undergo such stressful conditions.

• The thermal management of the entire system, especially as the rails increase in size needs to improve.

• The pulsed power unit and supply could be compacted and decreased in size, as it encompasses most of the system.

• Power supply too big and heavy – needs 3-story building and there is no commercial interest.

• Fully electric destroyers and battleships.

• Modified electromagnetic railguns outfitted for aircraft.

• Small battery packs that are powerful enough to power handheld .

• Launch assist system for space craft.

SHORT TERM GOALS• Increase the fire rate of the current prototype up to ten rounds

per minute.

• Find a more efficient combination of metal conductors for the rails and for the armature

THE FUTURISTIC WEAPON

‘’RAILGUN’’

THANK YOU

ANY QUESTION ?