Well, I have found something in the way of research. It is called the de Laval nozzle, which is a special nozzle that I believe is supposed to create more thrust or something. Basically it is a plain ol tube, except that it's pinched in the center. Apparently this maximizes the kinetic energy created by the escaping gasses, which I guess is a good thing. The gist of this post is that this thing called the de Laval nozzle will make my rocket go zoom...!