Pirate Cannon - A working replica of a naval cannon that fires pneumatically

Step 2 Cut the Material

I used two inch ridgid foam for the main material of the cannon. One 4 X 8 sheet of two inch runs about $20.00. I marked out 12 inch by 12 inch squares and cut down the foam.

I marked the center point and cut a hole with a two inch hole saw for the barrel.