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300 psi+ Piston rifle

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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Unread postAuthor: far_cry » Mon Apr 27, 2009 2:42 pm

CpTn_lAw wrote:but the fact you don't have a wide angle is kinda f***ed up in HD...


i didn't get it :oops: :oops: :oops:
maybe i have what you talking about ,but can you explain what you mean with wide angle that i didn't have ?? :? :? :?
thank you and i waiting for the link :P :P
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Unread postAuthor: CpTn_lAw » Mon Apr 27, 2009 3:19 pm

Oh sorry, no I meant, the camera doesn't have a wide angle. Oh and btw, here is a pic of penetration at 250 psi...I just took it, my ears are still ringing :D , now, each four box was placed one behind another, combining 8mm of wood. I also shot through the sides, they are 1/4" thick each, and the .25 gram BB went through two. To compare, a steel BB at 12 bars goes through three....I'll have the photo as soon as my camera is charged up!

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Unread postAuthor: MRR » Mon Apr 27, 2009 3:21 pm

Really nice build.

Have you considered to mod your blow gun a little bit?

The exit holes in the blow gun and the release valve are pretty tiny.
I drilled them larger at mine and gained a noticeable boost in performance.

Like the hose barb; I use them as well.
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Unread postAuthor: CpTn_lAw » Mon Apr 27, 2009 3:29 pm

Well, for the moment, even at 17 bars, the "pressing" and the shot are almost simultaneous. I do not even have to press all the way it actuates pretty well.
Thanks for the comments guys! ;) it'd been a long time since i had built something i could be proud of ^^ :D
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Unread postAuthor: Sparkie » Mon Apr 27, 2009 5:40 pm

That slow mo footage was great. It looked weird watching the ball "wobble towards that tree.

Looks like a sturdy barrel as well.
Keep up the good work.
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Unread postAuthor: Mitchza89 » Mon Apr 27, 2009 7:19 pm

Aye Aye Cptn! :D I absolutely love the simplicity and sturdiness of this gun. Reminds me of my days with the "Mitcho's Musket"

Awesome damage vids too!
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Unread postAuthor: sssssbooom » Mon Apr 27, 2009 11:35 pm

Dude great video I love the slow mo parts and the music also. Just an all together great video. Also I like your gun looks very simple, and straight to the point really cool.
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Unread postAuthor: Crna Legija » Tue Apr 28, 2009 2:41 am

very nice build. love the slow mo really good quality.
would be nice if you make a wood stock and maybe a scope
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Unread postAuthor: CpTn_lAw » Tue Apr 28, 2009 8:15 am

Thanks a lot!!

I didn't want something overkill , just wanted it simple , high power plinker. I've done some more tests, with 1mm steel shot. You know those demineralized water jugs (5 Liters) well, at 250 psi, 3 out of four go through.
An airsoft BB goes through everytime.
I'll try to take a video of a supersonic shot, but it isn't everytime....sometimes it does it, sometimes it just won't. I think this gun will be the base for some upgrades, wooden stock, scope, green laser etc etc.... ;)
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Unread postAuthor: Carlman » Tue Apr 28, 2009 10:27 am

Hey mate could you post up some actual pictures in thi thread?

I have been working on and offv(when i get funds) on a launcher just like this for use at the same pressures for about a month now lol
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Unread postAuthor: CpTn_lAw » Tue Apr 28, 2009 11:38 am

Doing this right away, stay there ^^


Here they are :

Sorry i didn't open up the valve, i've had trouble keeping it airtight

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Last edited by CpTn_lAw on Tue Apr 28, 2009 11:50 am, edited 1 time in total.
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Unread postAuthor: Carlman » Tue Apr 28, 2009 11:49 am

What is your piston?
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Unread postAuthor: CpTn_lAw » Tue Apr 28, 2009 11:50 am

The piston is hot glue with neoprene seal on top, and a screw to hold it there
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Unread postAuthor: Carlman » Tue Apr 28, 2009 11:53 am

Sweet, my valve with have very little pilot volume and a light piston, it will be interesting to see the difference
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Unread postAuthor: CpTn_lAw » Tue Apr 28, 2009 11:58 am

well, i have a very small pilot volume too...but the piston is pretty heavy, i guess yours will do better than mine ;) but no worry, i'll be glad to see your gun when it's finished :D
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