Load the barrel with anything, connect the bike pump to the schrader valve, pump it up (be careful, don't go pumping it up past 75 PSI, around 35 PSI...
A tutorial on how to make a cheap, pneumatic potato cannon powered by a bike pump from easy to get materials. It's really simple to make, but don't underestimate its power. They can shoot straight through a pretty thick sheet of plywood and break windows. Be smart and be careful when you are using one. Do NOT hold me responsible if you get hurt!!! The pictures might be a little blurry, it's because I took them out of the video I made on how to make it.
-Two pieces of 2" PVC Pipe (any size)
-One 2" Non-threaded PVC End Cap
-One 2" PVC Valve (not threaded)
-One Schrader valve (from an old bike tire)
-A saw (to cut the PVC pipe to your desired length)
-A drill with a drill bit that is about the same size as the schrader valve
-PVC Primer and Cement
Step 2: Mark and Drill hole for schrader valve
Put the end cap on one of the pieces of PVC, pencil and mark about an inch down from where the cap ends. Then, drill a hole where the mark is. The hole should be the same size as the schrader valve.
Step 3: Installing the Schrader Valve
Apply the PVC primer and cement to the hole, then, from the inside of the PVC pipe, push the schrader valve through the hole and hold for about 45 seconds.
Step 4: Attach the rest
Apply primer and cement to the end of the PVC and connect the end cap. Then, connect the PVC valve to the opposite side of where you just attached the end cap. You're almost done!
Step 5: Connect the Barrel
Apply PVC Primer and cement to the other piece of PVC pipe and the PVC valve, connect the two and you are done! Now wait 24 hours for it all to dry.
Step 6: To use
Load the barrel with anything, connect the bike pump to the schrader valve, pump it up (be careful, don't go pumping it up past 75 PSI, around 35 PSI is fine), aim, and with speed and force, open the valve. That's it, I recommend watching the video I made because it's easier to understand. Have fun!