A Tabletop Demonstration Railgun

Intro Theory Construction
Power Source Rails Projectiles Injection Our Results Go To
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The first projectiles used were pennies. They are lightweight, and good conductors. Unfortunately, getting pennies to slide all the way through the rails was difficult. The current pulse would damage the pennies, causing them to stick in the rails. The next projectiles used were aluminum cylinders, 5/8" in diameter and around 3/4" long. The length provided more surface in contact with the rails, but the problem of the projectiles sticking in the rails still existed. The next and final projectile used was a cylindrical piece of graphite. The graphite slugs show little damage from the current and do not stick in the rails.

Figure 7: Projectiles