Hi in a couple of weeks i'm going have and physics project in school. I have decided to make the project about railguns. I'm going to build something similar to this: http://184.108.40.206/search?q=cache:t7YO350tj_4J:http://220.127.116.11/search?q=cache:t7YO350tj_4J:www.geocities.com/physicsthings/microrailgu.htm+&hl=en&client=firefox-a but maybe a bit larger. Since it's physics project I need do an experiment and do some calculations. This is where you come in I was hoping that you help with which theory and experiment i should use. I'm on my last year of something similar to High School. Personalty i'm thinking that something this could be my theory: Lorentz force Something about plasma http://en.wikipedia.org/wiki/Railgun#Mathematical_formula I excuse for my rusty English, I hope you understand me.