
In my follow up to my last post on how to build an electromagnet, I am going to explain how to build a mass driver, or in the scaled down version, a coil gun. To build a coil gun, you need all the same types of materials you needed for the electromagnet, just in different forms. You will need a lot of copper wire, a large battery(a car battery or two would be fine), a metal tube, and an iron projectile that fits snug in the tube. To make the coil gun(also known has a Gauss Gun after Carl Friedrich Gauss), wrap the copper wire around the tube(the tube will now be called the barrel), this creates an electromagnetic field. Attach one end of the copper wire to one of the terminals on the battery, but do not connect the other end. Place the iron projectile in one end of the barrel. To fire, place the other end of the wire onto a terminal, then after about a second, take it off. With enough copper coils and a big battery, it should fire. A mass driver is just a really big coil gun. They could be used to shoot iron projectiles over great distances, and if one is big enough, could even launch supply's into space. Be careful if you make one of these, it can be dangerous. Always take safety precautions, and never get out of hand. If you make one of these correctly, they can be really fun.


