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My New Sniper Cannon

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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My New Sniper Cannon

Unread postAuthor: nivekatoz » Mon Mar 31, 2008 11:13 am

This is my cannon that I have been working on ...The chamber is t-6 air craft aluminum alloy sch 80. I had steel but that was a bit to heavy. The barrle is red brass 1/2" pipe and is perfectly smooth and seamless on the in side. I plan on using wire nuts for ammo. Im going to epoxy a nail through the wire nut to make a dart. The middle part is a brass tank tee for pressure tanks for well pumps. The valve is a brass ASCO 3/4" diaphram valve. Its just like a sprinkler valve. Its also modified in a similer way. I slightly modified the guts of the valve to lighten it up. I plan on taking the gun up to 120 PSI . Inside the white cap on the botton of the tee is a pop off safety valve rated for 125 PSI. I think I might paint it? The triger is a modified safety pop off valve rated for 150psi.
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Last edited by nivekatoz on Mon Mar 31, 2008 11:43 am, edited 1 time in total.

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Unread postAuthor: Jared Haehnel » Mon Mar 31, 2008 11:22 am

Your pictures didn't quite make it if thats what you were trying to add on...

I look forward to seeing how your dart preform be sure to post results 8)
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Unread postAuthor: nivekatoz » Mon Mar 31, 2008 11:45 am

How come I cant get the pix to show up. should I use the url thing or the Img thing??
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Unread postAuthor: Lentamentalisk » Mon Mar 31, 2008 11:54 am

you dont need metal anything if you are only going to take it up to 125. PVC pipe and fittings (so long as they are NSF-PW are good to arround 300psi at least. You are just adding unnecessary weight, but at least it will look nice.
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Unread postAuthor: MrCrowley » Mon Mar 31, 2008 1:25 pm

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Unread postAuthor: THUNDERLORD » Mon Mar 31, 2008 2:02 pm

wish your pictures went through. i'll check later.for your projectiles it might work better to find a short bolt that fits inside the wire nut and pull the aluminum thing out of the hollow cavity in the wire nut. drill a hole in the wire nut and fit the bolt through and screw a nut onto the bolt. you can grind or file it to a point or leave it blunt. i got to get my camera set up so i can posts pics to explain better.
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Unread postAuthor: koolaidman » Mon Mar 31, 2008 2:48 pm

[quote="Lentamentalisk" PVC pipe and fittings (so long as they are NSF-PW are good to arround 300psi at least.[/quote]

^I for one did not get this memo.^ The psi decreases as diameter goes up. Plus i would never bring pvc to its burst pressure. I would never go over 135.
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Unread postAuthor: DYI » Mon Mar 31, 2008 3:13 pm

The burst pressure of 2" SCH 40 PVC is over 800 psi. As long as you don't do something stupid like filling it with a pressurised gas rather than a liquid, you'll be fine up to its rated pressure of a few hundred psi.

Since we always fill it with gas, material that is safe for use with gases is a better idea. Hence aluminum. But yeah, SCH 80 alu. pipe and a red brass barrel are kind of overkill on a gun that you can't use past 125 psi.
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Unread postAuthor: bigbob12345 » Mon Mar 31, 2008 3:23 pm

Take off that pop off, make a high pressure pump, and Rock on :headbang:
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Unread postAuthor: nivekatoz » Mon Mar 31, 2008 9:27 pm

I think I have this worked out with the pictures.
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Unread postAuthor: OuchProgramme » Mon Mar 31, 2008 9:41 pm

Is that a laser on the top?
Usually would be on bottom...heh. I thought it was a super tiny scope :shock:
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Unread postAuthor: jook13 » Mon Mar 31, 2008 9:44 pm

that is sweet how pop valve seems to be perfect as a trigger. But its a shame that it limits you to 120 psi. I have seen some of those at a higher pressure rating on mcmaster.com (up to 300). It would be cool since it appears that your gun can handle much more psi otherwise. still, it looks comfortable and I bet it is still plenty powerfull. well made. I really dig the design.
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Unread postAuthor: nivekatoz » Mon Mar 31, 2008 9:48 pm

I was going to mount the laser on the bottom of the barrel ,but I thought it might be in the way so i place it on top ..It does not block my view down the barrel. I will soon be posting some damage shots and ammo pix.
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Unread postAuthor: Mitchza89 » Mon Mar 31, 2008 10:41 pm

Mate that's a dead set beauty of a gun! I've always wanted to get myself a brass solenoid valve and mod it with a pop off valve but looks like I was beaten to the button :D. Great job on a great looking gun.

Need some damage pics!

All the best,

Mitcho.
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Unread postAuthor: OuchProgramme » Mon Mar 31, 2008 11:02 pm

Mitchza89 wrote:Mate that's a dead set beauty of a gun! I've always wanted to get myself a brass solenoid valve and mod it with a pop off valve but looks like I was beaten to the button :D. Great job on a great looking gun.

Need some damage pics!

All the best,

Mitcho.


Ahh...but chrome would be the best.
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