First Lost Foam Castings
Backyard Foundry

Body of Cannon
Cannon Wheels: I used a pen to vent the foam and it turned out that the point stuck out the other side and looked cool so I decided to let it stay and I used the risers formed by the pens for the axle.
Completed cannon
Here is a video of the cannon firing.
       Click on the arrow to start it.
My email platform stopped allowing me to send out my e-zine so I have set up a Google+ site to keep everyone updated with my latest projects and to interact. click "follow" below to get updates.