Easy Pneumatic Potato Cannon. Fun and Powerful!

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Introduction: Easy Pneumatic Potato Cannon. Fun and Powerful!

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.

Check you the video tutorial!


Step 1: Getting Started

Parts:

-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)

Tools:

-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!

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    user

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    192 Comments

    I cant find thy video

     thanks man

    As far as this failing, exploding and injuring and killing you....
    1) Id imagine if you are using various chemicals, explosives are int he least stuff that heats up, it will affect and compromise it.
    2) id also say, I personally would let all air out when not in use so it doesnt expand and contract, and keep moisture out of it for the same reason.
    3) maybe spray it with some UV resistant spray if you are going to use it outdoors? I saw a discussion about pvc bows (like a bow and arrow)
    4) maybe consider wrapping it, like shrink wrapping it
    5) maybe make a guard, like something around it, with a little space even lined with something like old mouse pad material.

    1 reply

    Oh yea
    6) Maybe get like a pressure release valve thingie. at X amount PSI ....

    Holy crap! That's horrific. I hope those dudes are OK now.

    user

    If I was you I would spend the extra five dollars to get the rated pvc. Mine can get up to 150 psi safely. It did explode in my face once, but that was because i was stupid and I pumped it up a few minutes after I applied the glue. At around sixty psi, I was still pumping and the barrel shot across my floor like a missile. scary as hell I thought I had hearing damage.

    2 replies

    Use a fail safe put in in rated pvc in a place you don't mind failing where it will explode away from your body and keep people clear of it maybe a regular end cap on a t joint or something that will be easy to replace so you can keep your cannon intact and just replace the part or maybe a pop off valve

    Same here, except mine had a 4 foot 3 inch chamber and had 120 psi in it. Dented metal lockers on one end of the room, busted a hole in insulation on the other end. I couldn't hear for about 1 minute, and couldn't hear normally for like 15, kids be careful, these are not toys!

    omg my parents think its to dangerous how do i convince them

    8 replies

    science project? that's how i got my stun gun... (seriously)

    Lol. I made nitrocellulose for mine.

    well, just testing the conductivity of materials... really i just wanted a stungun :P *for science purposes, of course*

    why not wireless power?

    huh? what, you mean like conducting it through the air?

    like using magnetic power to do wireless electricity I guess.

    uhh... why??? it would only send whatever power was in the 9 volt inside the stun gun...