cool coil gun

8/3/2019 Cool Coil Gun

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Daniel Eindhoven is talented designer who created this cool coil gun. It took around 40 hours to

finish this outstanding job. It weights 5 Kg and, capable of delivering over 18J kinetic energy,and speeds up to 110km/h . This weird coil gun has laser pointer for easy aiming and it costs

around 100 Euros.It needs 8 seconds to fire a projectile if is connected to power source or 90

seconds with batteries. It is really impressive, Im not a gun lover but this one is really made with

creativity. You may also would like to check this Swiss mini gun, the smallest gun in the world.A coilgun, as the name implies, consists of a coil of wire an electromagnet with a

ferromagnetic projectile placed at one of its ends. Effectively a coilgun is a solenoid: an

electromagnetic coil with the function of drawing a ferromagnetic object through its center. Alarge current is pulsed through the coil of wire and a strong magnetic field forms, pulling the

projectile to the center of the coil. When the projectile nears this point the electromagnet is

switched off and the next electromagnet can be switched on, progressively accelerating the

projectile down successive stages. In common coilgun designs the barrel of the gun is made upof a track that the projectile rides on, with the driver electromagnetic coils around the track.

Power is supplied to the electromagnet from some sort of fast discharge storage device, typically

a battery or high-capacity high voltage capacitors designed for fast energy discharge. A diode is

used to protect polarity sensitive capacitors (such as electrolytics) from damage due to inversepolarity of the current after the discharge.
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There are two main types or setups of a coilgun, single stage and multistage. A single stagecoilgun uses just one electromagnet to propel a ferromagnetic projectile. A multistage coilgun

uses multiple electromagnets in succession to progressively increase the speed of the projectile.

Many hobbyists use low-cost rudimentary designs to experiment with coilguns, for example
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using photoflash capacitors from a disposable camera, or a capacitor from a standard cathode-ray

tube television as the energy source, and a low inductance coil to propel the projectile forward. Asuperconductor coilgun called a quench gun could be created by successively quenching a line of

adjacent coaxial superconducting electromagnetic coils forming a gun barrel, generating a wave

of magnetic field gradient traveling at any desired speed. A traveling superconducting coil might

be made to ride this wave like a surfboard. The device would be a mass driver or linearsynchronous motor with the propulsion energy stored directly in the drive coils.
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One main obstacle in coilgun design is switching the power through the coils. There are severalmain optionsthe simplest (and probably least effective) is the spark gap, which releases the

stored energy through the coil when the voltage reaches a certain threshold. A better option is to

use solid-state switches; these include IGBTs or power MOSFETs (which can be switched off
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mid-pulse) and SCRs (which release all stored energy before turning off). A quick-and-dirty

method for switching, especially for those using a flash camera for the main components, is touse the flash tube itself as a switch. By wiring it in series with the coil, it can silently and non-

destructively (assuming that the energy in the capacitor is kept below the tubes safe operating

limits) allow a large amount of current to pass through to the coil. Like any flash tube, ionizing

the gas in the tube with a high voltage triggers it. However, a large amount of the energy will bedissipated as heat and light, and, due to the tube being a spark gap, the tube will stop conducting

once the voltage across it drops sufficiently, leaving some charge remaining on the capacitor.
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The coil gun first appeared in literature as the electric gun in the 1897 science fiction novel ATrip to Venus by John Munro. The novel described in detail a way to launch vehicles into outer

space from the Earths surface. In the novel, Munro describes in great detail multiple coils fired
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in sequence by solenoids timed to achieve acceleration without generating g forces that would

harm passengers. The gun could be angled on a hillside if desired.

cool coil gun

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