A Tabletop Demonstration Railgun

Intro Theory Construction
Power Source Rails Projectiles Injection Our Results Go To
Home Page
email me
The projectiles needed to be injected into the rails with some initial velocity, to prevent sticking in the rails. The first method was pushing the pennies into the rails using a piece of PVC pipe. This gave very inconsistent results, so in the next design, a spring-loaded launcher was added. This consisted of a bolt in a piece of PVC pipe, with a spring on the bolt and a block on the end for the spring to press against. This gave more consistent results, but was still not fast enough.

Figure 8: Spring Injector

The final injection system consisted of the PVC pipe from the spring-launcher with an air hose leading into the back, a hand-operated valve, and a compressed air source. This gave us better consistency and higher speed.