A Tabletop Demonstration Railgun
The first rail design consisted of two copper bars, about 3/8" x 1/2" x 7", screwed down to a
2x4, with a channel cut out for the projectile to slide down (pennies at the time).
Figure 4: First Setup
We then moved to bolting the same rails down to a piece of plastic on the final design. The
projectiles slid better on the plastic, and it was easier to make sure that everything is square
Figure 5: Final Setup
Copper was used for the rails because its low resistance would help give us a larger current.
The rails are showing some erosion, which could become a problem after several shots.
Figure 6: Eroded Rails