[Ben] created a piston valve for this cannon that can be built with parts sourced from your local home supply store. Anyone can build this thing, and everyone should. Instead of using a ball valve ...

This cannon-ball was fired from Castle Cornet, a Royalist stronghold, when the rest of the Island was Parliamentarian.This cannonball was found in the Town Church in St Peter Port. Being made of ...

[hw97karbine] has made a pretty cool tennis ball cannon. While making a cannon of this sort is nothing new to us, we were impressed by the effort taken to get a stoichiometrically ideal mixture of ...