Induction Launcher

I built this in my 20s (aka a very long time ago 😆). The principle of operation is a huge pulse of electricity into a flat coil induces a current in an aluminum disc. This creates an instant opposite magnetic field in the disc, and thus the disc is repelled with extreme speed. This is a very very quick overview of the ancient contraption. A similar concept is used to accelerate those modern instant launch roller coasters! This is NOT a coil gun or rail gun - those operate on completely different principles.