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First off, this is a copy of plasticex009's HVPL-01. I thought his design was a great idea so I made my own. I finished this about a month ago but haven't gotten around to posting it.
I call it the berry gun because my primary ammo is these berries that grow near my house. But don't be deceived by a berry as a projectile. They are able to do quite a bit of damage. The chamber is made of two 24" pieces of 1" copper, and the barrel is 56" of 1/2" copper. It is piloted by a 1/2" ball valve.
Let the pictures and videos begin (they are pretty big).
If you can't play the videos, try VLC media player. They are xvid video with mp3 audio.
The gun itself:
Berry against a soup can:
First attempt at 85 psi:
Second attempt at 120 psi:
Side by side:
Nail through quarter:
Side by side:
Berry against soda cans:
Berry against altoids sour tin:
Please post any questions or comments.
Thanks for the feedback!
Yes it does use a piston valve. The piston is just a bolt with two washers with a short piece of 1/2" pvc and an o-ring in the middle.
Awesome. Yes it uses a piston valve. Piloted by a Ball valve. more info on pistons here
Nice gun. I didn't realise a berry could do so much damage. I just thought it would splatter.
Nicely done though berries are limiting its destructive potential
Also what do you use to glue together copper pipes. and i am interested in making one of these copper guns but i just wna to know a little more on how to make that piston valve of yours. Maybe a diagram and a step-by-step instruction. That would be greatly appreciated. Thx. And pictures of the piston too.
Copper is soldered (sometimes called sweated) or brazed using a propane/MAPP torch and solder, not glued. They *could* be connected by epoxy or etc... but that won't hold anywhere near as much pressure. Properly soldered copper joints should hold 250+psi.
Very nice gun. Not your first, I assume?
Hope you stick around the forums.
But berries aren't my only ammo. I can also shoot AAA batteries and whatever else I find that fits in the barrel. I just haven't made any videos or taken any pictures.
The copper is not glued to to the fittings but soldered. Search around and you might find some tutorials on how to solder copper pipe to fittings.
Maybe tomorrow I'll take it apart and take some pictures.
If you do make videos, they're always welcome here
What's the maximum pressure you've used it at? The construction looks like it could take 200 psi easily, that's a fair bit of pumping but the power benefits will make it worthwhile.
I believe soldered joints hold whatever the pipe does. As for gluing there is a specific type of glue called JustForCopper which holds up to 500psi when used in endfeed fittings with pipe.
very nice cannon. It looks like it has some super damage potential. Good work
really good quote/phrase here
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