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




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Sam Van Battel: I built this last summer for our mass LARP to shoot foam arrows, and had a lot of trouble creating the piston. Hockey pucks (as suggested in the comments) were too heavy, and as I'm living in Europe where the sizes of pipes etc... is different, I couldn't use the setup in the video.
I eventually made it with a pipe-endcap and some rubber, but every 30-40 shots, I have to take apart the gun and fix the piston. For some reason the rubber keeps losening, even with epoxy applied.

It's an awesome design, and especially if you're into LARP and want to have something that can be made to look like an old-school cannon, this is amazing! But that piston is a pain in the ass to create :D

Raphael Lizares: Can a tennisbal fit?

Chris Francis: Where do you source your parts? I am having trouble finding the reducers that you show here. Flush bushings are easy to find. but the reducers you show I can't find anywhere

rp7r: is this better than just pressurizing a chamber and just using a valve to pressurize the barrel and launch jt? why the added step if having to us a piston?

Leonardokite: Yet another awesome idea/project. I'm going to need to quit watching these videos or I'll never get anything productive done LOL!

Dialed In DIY: Very cool... I've been making a bunch of different kinds of PVC cannons, horns & more but none like this. I love the design!

Peacekeeper Hero: I just want to say a hockey puck as a piston does in fact work. I've tried it.

Peacekeeper Hero: I built this thing twice and It did not work. The barrel kept leaking and I followed you video to the letter. Please. Please build another cannon like this one but without using the tee caps because I had to order them online and has to wait to days. Please please redo this.

jacob lineberger: Could this fit a tennis ball of not what adapter would I change it with?

Jurald Fiel: can you make a fishing sinker launcher?

Razor knight: Sorry, this may be a dumb question, but does the piston go on the valve side of the screws, or in front of the screws, the animated images aren't loading on my laptop so I can't see those for reference instead, if anyone also has a picture or video they could inform me of that would be great too, thanks

Jonathan Pless: Instead of the T-caps or a hockey puck, would it be possible to use a bigger piston like you've made? Maybe attach another rubber seal (just larger) on the end of the barrel? I, like others, are having difficulty with the piston sealing. Thank you!

Jk Teehee: should I stick aluminium tape around my hockey puck?

JustOneForAll: Brilliant video very well explained. Left a massive LIKE

Soumyadeep Das: flashlight bb gun principal....????

Ethan Zadorski: could it fit a tenis ball? i want to make one for my dog

Jimmy Ewin: Hey Ben,
What are your thoughts about using modified sprinkler valves in a pneumatic cannon?

Jk Teehee: should i use a hockey puck, both vent tee caps and use of epoxy cane be replaced?

Щавельный octocat: объясните русскому, как это работает и как это собрать ?????? Пожалуйста, pleas tolk the russian people, How to build this gun???? I'm from russia.

Peter Cooke: How much did this roughly cost?
Rating:
How to Make a Powerful Coaxial Piston Cannon from Hardware Store Parts 5 out of 5

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