Si.

Hi, I'm Simon Monk. I have a love of all things scientific and am author of '15 dangerously Mad Projects for the Evil Genius' which describes a real mixture of science and engineering projects (coil-gun, trebuchet, simple light-seeking robot etc). I include explanations of the science behind the projects for those who are interested. Nice forum

There is a full Coilgun design, with step-by-step instructions here: http://www.dangerouslymad.com/sample-chapter You will also find a video of it in action elsewhere on that site.