How To Make A Powerful Coaxial Piston Cannon From Hardware Store Parts




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Miguel Rojas: Nice. One question, if this type of cannon was built to about 2x in size, will it have increased power, enough to clear a range of 30-40 yards if loaded with, let's say, yellow squash?

Bryan Ropar: Did you ever think about mounting the cannon (or bigger one) on the bottom of a go cart and putting a long piston in it? So that way you can casually back up agents a wall or solid object, open the value, and take off like a shot leaving the piston behind and everyone wondering how you did that. 

Crossbow Payload!: I dislike the valve firing mechanism, is there any other way/part to hold then release the air?

Nintendo101maniac: Dang! Definitely would hate to get hit by one! I have a question though:If you'd put 2 blades that have been put together to form a + shape (removable of course, for loading, and so you're not stuck with only that option) at the end of the barrel, would it make it a spread-shot cannon?

bill gaits: can you give list of material you use 

cdrobson: Love the thought that went into the design. Really cool. Where'd you come up with the coaxial design?

Dean Mavis: At 6:09 it looks different than when you glued the rubber washer in. 

eric chen: If someone is going to put something small like airsoft pellets would you need something like a wadding?

stargazer3593: Awesome! Imma use dis for Riots! (Not really but I picture some one actually using it for that purpose.)

antonio balladares: @NightHawkInLight I made your Coaxial Piston Cannon, but i'm having a lot of air leaking through the 2 inch barrel. Can you help me out. 

TheAnnoyingBoss: im going to give this to my mom when she complains about making mashed potatos 

sciencefair: We have just built this and felt that we followed the directions meticulously except we could not find the metal end caps for the piston. We have used a hockey puck, put a lip on it and wrapped it in foil tape. We are not getting a very good seal and hence it is not firing. Any thought a on ideal weigh of the piston or ideal "lip size"

Jack Longlade: @NightHawkInLight I am thinking of creating this cannon and was wondering a few things that would be really helpful if you could answer. First is about the piston, have you build one with a hockey as the piston instead and how well did that work? Next question is about how much will it cost to create this type of cannon? I realize that you have the supply list posted but before I jump into this project it would be helpful i had a price range. It would truly help me if you could reply as soon as possible and thank you for the video. 

Rajon Ali: has anybody done this? How much did it cost?

Sith ari: would heavier ammo work with this or are potatos the limit?

Brian Gross: Hi could you also modify the cannon so that it has a ½ inch barrel for for example blowgun darts? 

Neonninja1415: Try putting a Nerf Vortex pocket football in that tater cannon. I'm making a launcher for airsoft milsim and I think this would work great with it.

Darius Carroll: a friggin 3 inch long PVC pipe nipple, a whole lot of sex refrences jesus help me.

Arthur Hunt: AWESOME TOY. BET I CAN TRAIN MY CAT TO STAY OFF THE KITCHEN TABLE. .Not really.

Matthew Wessels: could i charge this to 100psi

ipanase megison: wow complex

chris platt: Is there anything that can substitute the gas vent tee caps? I cant find them.

Juan Kmaney: Hi Bud! Thanks for sharing with us. quick dumb question, I'm about to start building one of those, but I want use it for "bait caster" instead, so I know that the barrel has to be longer, and I like to know if I have to make the whole setup longer or just the barrel.... Thanks again.

WINSTON SMITH: More trouble than hair spray but better!

D Smith: Will you see how fast the ammo goes 

Goldie Neko: would this work if you put confetti in it instead of potato? 

DeadEye MC: what would happen at 100-200 psi

Blastin22turnips: Would this be able to be modified so it could shoot a high power blast of water?

Darius Carroll: srry heard that wrong

Idabus: Could u shoot a little foam nerf foot ball with it

LeskiStation: Amazing tutorial. Very well done

Madison Harper: I see a lot of room for improvement on this design... I'll have to build it. Probably a solenoid dump valve for your rear end, electronic trigger, hoseclamps, arm brace, etc.

Mike Newell: Your air cannon is cool. I just made a big air cannon

Bob R: I just spent hours completing this cannon. I followed all the directions and specs as best I could. I have run into a huge problem..... Connected my bike pump, pumped it up like 8 times.... Turned the valve..... And all the air fired from the back of the valve????? Total opposite direction???? Now, this was all done with an empty chamber. Does it matter if I load the chamber??? I guess I will go get some potatoes... 

Gintoki Azuma: i have a question Will it put a hole in someone stomach if they get hit ?

Don Green: Made one but when dry firing all the air escapes through the ball valve not the barrel. I've played with wrapping the piston and not wrapping it but nothing seems to work. With no tape on the piston I can hear it move as I tilt the cannon back and forth. Any suggestions to get it to work?

jean paul Saliba: i need help the its not shooting followed instructions aig goes to the outer barrel but not inner barrel 

Diane Hunter: Can you fire something heaver than a potato in it?

BlueCro64: hey great video. I managed to solve the air leak problem with the rubber seal. Used a cell phone rubber sticky pad for the car, i added dust to make the rubber not stick so much, the soft rubber works good. The problem im still having is the piston does not open when the ball valve is released, it drops down after the pressure is released. i added a couple more lairs of foil tape and the piston is tighter but still have the same problem. Should i keep adding foil lairs or am i overlooking something? Appreciate your input.

Mad and Major Gaming: I need some help. I live in America and ive been on almost every hardware store website I can think of and even after multiple google searches I havnt been able to find a pressure rated 3" to 1-1/2" reducer anywhere. Can someone help me out? Preferably someplace I can pick it up at and not have to order. thx.

Jim McFarland: Would a smaller diameter barrel work? I want to shoot golfballs out of it or would I have to wrap them in something if a smaller barrel wouldn't work

pippaknuckle: Waste of good potatoes!

BurritoBandito: Can I add this to the foam noodle rocket launcher?

Abraham Monroy: Could i have one Ford 5 bucks??

KraZer: Can anyone tell me how much this would cost? Need it for a 9th grade project

kenvadnais: I'm having a problem with two parts: 1) grinding off just the lip of the T-Cap evenly 2) after pouring/mixing the epoxy into the 1st T-Cap, I can't get the 2nd T-Cap to sit evenly. Either there's too much epoxy or not enough. Either way, the 2nd T-cap doesn't seem to set even. Do you have any advice?

Morgan Smith: What could I use for as a substitute for the galvinized steel vent tee caps??

Steve Nottingham: That will give you a nasty bruise. Too funny. You have to much time on your hands,

Kathy Freeland: Wow, why make something more complicated than it is in reality? Potato guns are suppose to be cheap, fun, and fail proof. Either way, the pipe is only rated at 40 PSI, so why make a piston? Just load a piece of pipe up with air and shoot it. But that's my philosophy. 
Rating:
How to Make a Powerful Coaxial Piston Cannon from Hardware Store Parts 4.9 out of 5

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How to Make a Powerful Coaxial Piston Cannon from Hardware Store Parts