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Shotgun and video.

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: Brian the brain » Fri Sep 15, 2006 3:37 pm

I'll be close by to help out hehehe
POS and I speak the same language..
Should be a hell of a lot easier to explain stuff....
My English isn't bad but , boy, some things are impossible to translate...
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: Brian the brain » Fri Sep 15, 2006 3:38 pm

Accidentally duplicated the former post.
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: POS » Fri Sep 15, 2006 3:49 pm

Tip : if no one else has answered your last post, (now here it wont work, cause i answered) you see next to the "quote" button a button "delete". If you accidently post things twice, you can use that button to erase the last message ;)
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Unread postAuthor: )DEMON( » Sat Sep 16, 2006 1:01 am

Yep, we know 8)

Brian, what is the max pressure of copper?Could you help me with making my spring loaded ball valve?
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Unread postAuthor: )DEMON( » Tue Sep 19, 2006 9:05 am

I have now got a longer barrel on my shotgun, it is coaxial and now it is super tough. Like the ak47 of spudgunning.
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OOooooo....
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Unread postAuthor: Brian the brain » Tue Sep 19, 2006 12:21 pm

The most I have put in a 15 mm copper pipe is 22 bar.
I wouldn't recommend going that far with 28 mm.Larger surface area.
Up to 20 bar it should be "safe", for as far as you can call it that.
he way you've put your gun together I'd say it could handle 25 bar, the rating of galvanised.
The small exposed copper and brass parts should hold.Just be sure those compression fittings are really UBER-tight!
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: MrCrowley » Tue Sep 19, 2006 2:19 pm

woah, your gun looks phucking awesome )DEMON( :twisted: , i like how you have a huge bore chamber makes it more shotgun-like
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Unread postAuthor: )DEMON( » Tue Sep 19, 2006 2:30 pm

Thanks Brian. I will tighten all the fittings and compression fittings when I disassemble the shotgun. Not permenantly but so I can grease up the piston, add a proper 'barrel liner upper' and take all the teflon tape off most of the fittings. This is because I am going to silver solder the cannon together. I also have to fix the fill valve and finish my spring loaded ball valve.

I wouldn't call the chamber huge, it just looks bigger than it is. It is 1 1/2 inches.

Can I get some help with the gas gun design tool, I don't really know what some of the things are. I would like to see if the preformance is as good as I can get it.
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Unread postAuthor: MrCrowley » Tue Sep 19, 2006 2:58 pm

i know it wasnt bigger tehn 1 1/2" but its big compared to the barrel and it looks sweet.

what help do you need with GGDT, i know most of it now.
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Unread postAuthor: )DEMON( » Tue Sep 19, 2006 3:12 pm

If I take all the measurements and volume will you see the preformance?
I don't know how fast the valve is and I don't have the ggdt on my pc.
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NEW VIDS!

Unread postAuthor: )DEMON( » Thu Sep 28, 2006 10:21 am

I made some more videos. Just shooting throwing spikes again. Yes, the camera is taped to the cannon.

In this one I shot four throwing spikes at a coke bottle filled with colored water. At around 40-50 Psi, there are no gauges.
Image

In this one I shot one throwing spike though the lid and out the other side.
I will get more exiting videos.
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The throwing spike went another 10 meters.
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