Hello, I posted a thread over a month ago asking some basic questions on railguns for my high school science fair project. Since then, I've built a working railgun that fires both cyndrilical and square projectiles. Unfortunately those projectiles consist of compressed aluminum foil, so it doesn't have much mass (around .1g). My goal was more along the lines of .25X.25X.25 inch cube of solid aluminum. The aluminum cubes I have put through my rails have stuck. Any help with figuring out my problem would be greatly appreciated. My problem, as I stated before, is that my aluminum cube (about 1g) is getting stuck in the middle of my rails. The odd thing is, that when I use my injector alone, it goes all the way through. Somehow when I apply current through my rails, the projectile slows down. On the other hand, I got my al. foil projectile to work by using less psi in my injector (I got it so the projectile would get stuck in the rails when only using compressed air). What could be happening to make my projectile get stuck? I have more details on some of my test firing if they are needed to understand the problem better. If anyone is interested, I'll post pictures and the essay I have to turn in for science fair.