Firing projectiles usually require either explosives or high pressure. But did you know that you can have that same effect by using the power of vacuum?
This DIY video will show you how to make 4 inch bore vacuum cannon using materials and parts that are readily available from the local hardware shop. And since it doesn’t require explosives, making the cannon is legal.
Well, at least if you use it for pure experimental purposes. It’s also easy to make because you will be using PVC as the main material for the cannon. PVC is soft, light, and very versatile.
Move on to the Next Page video: How to Make a Large Bore Vacuum Cannon.