"The energy level has jumped from 0.5 megajoules to 1.5 megajoules.A single megajoule is roughly equivalent to a one-ton car travelling at 100mph.
The impact of the projectile hitting a target would be 33 times that force.The railgun developed by the Navy launches and accelerates hundreds of conductive projectiles along pairs of metal rails using the effects of a strong magnetic field.
It can accelerate a seven pound projectile to a speed of 5,600 miles.
Navy officials said that the range of a railgun is up to 20 times greater than that of conventional weapon systems.
A projectile could reach a target 290 miles away in less than six minutes and impact it with incredible force."
Our high school science club made a rail gun back in the mid 90's. Electromagnets placed along a glass tube would launch a finish nail down the tube and into a piece of plywood. Rapidly alternating the polarity of the electromagnets is what propels the metal. The hard part was finding the right frequency to alternate the current to the magnets.
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