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A coilgun or Gauss rifle is a type of projectile accelerator consisting of one or more coils used as electromagnets in the configuration of a linear motor that accelerate a ferromagnetic or conducting projectile to high velocity. In almost all coilgun configurations, the coils and the gun barrel are arranged on a common axis. It is not a rifle as the barrel is not rifled. The name "Gauss" is in reference to Carl Friedrich Gauss, who formulated mathematical descriptions of the magnetic effect used by magnetic accelerator cannons.

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An interesting coilgun created by Youtube-user AnselmoFanZero, which though it has not been rated in efficiency, the creator notes that he does not care to rate it, as it punches through a watermelon, which is good enough. The design is, to say the least, definitely one of the "prettiest" of the homemade gauss guns on Youtube.

Contributed by Sean Gay

Another video of the 1.25kJ Coilgun created by Youtube-user Larsplatoon, this time showing the details of its design, and construction.

Contributed by Sean Gay

A 1.25kJ Coilgun created by Youtube-user Larsplatoon, which he explains the workings, and gives a demonstration of. "A coilgun fires a projectile with magnetic force instead of gunpowder. The projectile from this gun won't kill a person, but the electrical energy stored in the capacitors is 78 times the lethal amount for human beings so this is no toy."

Contributed by Sean Gay

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