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150 bar 15mm caliber piston valve beast

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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150 bar 15mm caliber piston valve beast

Unread postAuthor: Vadim » Wed Aug 28, 2019 9:31 am

Hi
I've made a very powerful pneumatic gun based on a piston valve. It looks ugly but it's a prototype yet, because i don't have enough money and needed tools now to finish it. But it still shoots. Tested with paintballs and 15mm steel balls(barrels are exchangeable). I've been able to launch the paintball at 1175 fps at 120 bar and almost crash through the 25mm thick wooden board. 15mm steel balls measured at 1050 fps at 150 bar.
Chamber – stainless steel pipe. Volume is something around 115cm³.
  • 3

Attachments
IMG_20190828_181028.jpg
The front
IMG_20190828_181132.jpg
The back
wd55UElIs04.jpg
0.35mm steel(paintball again)
IMG_20190828_182722.png
The gun itself
IMG_20190828_182853.jpg
The piston

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Re: 150 bar 15mm caliber piston valve beast

Unread postAuthor: jackssmirkingrevenge » Wed Aug 28, 2019 11:38 am

Great work! Is it a spring ball valve that pilots the piston? To be honest with this kind of setup you can achieve practically the same performance using the ball valve as the main valve directly...
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Re: 150 bar 15mm caliber piston valve beast

Unread postAuthor: brandon2513 » Fri Aug 30, 2019 7:20 pm

Vadim wrote:Hi
I've made a very powerful pneumatic gun based on a piston valve. It looks ugly but it's a prototype yet, because i don't have enough money and needed tools now to finish it. But it still shoots. Tested with paintballs and 15mm steel balls(barrels are exchangeable). I've been able to launch the paintball at 1175 fps at 120 bar and almost crash through the 25mm thick wooden board. 15mm steel balls measured at 1050 fps at 150 bar.
Chamber – stainless steel pipe. Volume is something around 115cm³.


I like this a lot, maybe add a stock? 8)
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Re: 150 bar 15mm caliber piston valve beast

Unread postAuthor: Xamllew » Tue Sep 03, 2019 11:50 am

Holy crap, 1050 fps with 15mm bearings? You've got energy comparable to modern mid-caliber handguns.
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