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Diaphragm Pneumatic Cannon Update 12/9/06: Vid+Dmg pics

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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Diaphragm Pneumatic Cannon Update 12/9/06: Vid+Dmg pics

Unread postAuthor: Zorrowannabe9 » Tue Dec 05, 2006 12:04 am

This is my latest cannon, it is based off my larger scale design posted <a href="http://forums.spudtech.com/topic.asp?TOPIC_ID=14266">here</a> (keep in mind this is only slightly based off of it.

The chamber is constructed of a 4' section of 2" pipe, and the barrel is a coaxial 3/4" Sch. 80 paintball barrel. The Valve is a diaphragm design, which is placed inside of the union joint. The diaphragm is constructed of an inner tube from a bicycle (same place I got the schrader valve.)

I have yet to do any serious testing, but it does work and quite well. It makes a quite satisfying "pop" noise when firing. Ill do some chrony tests at a later time. Since I know that my design works...now its time for my full sized one [}:)]. Tell me what ya think! Any Questions?

<i> full body shot
<a href="http://img211.imageshack.us/my.php?image=1313181ha8.gif" target="_blank"><img src="http://img211.imageshack.us/img211/2368/1313181ha8.th.gif" border="0" alt=""></a>
Close up of rear/valve
<a href="http://img81.imageshack.us/my.php?image=1313182vf1.gif" target="_blank"><img src="http://img81.imageshack.us/img81/7668/1313182vf1.th.gif" border="0" alt=""></a>
full body shot #2
<a href="http://img223.imageshack.us/my.php?image=1313184r1di2.gif" target="_blank"><img src="http://img223.imageshack.us/img223/884/1313184r1di2.th.gif" border="0" alt=""></a>
muzzle close-up
<a href="http://img224.imageshack.us/my.php?image=1313183qz6.gif" target="_blank"><img src="http://img224.imageshack.us/img224/3759/1313183qz6.th.gif" border="0" alt=""></a>
close-up of barrel side of valve
<a href="http://img80.imageshack.us/my.php?image=1313185pf9.gif" target="_blank"><img src="http://img80.imageshack.us/img80/8232/1313185pf9.th.gif" border="0" alt=""></a>
close-up of barrel support (keeps barrel centered)
<a href="http://img80.imageshack.us/my.php?image=1313188tg1.gif" target="_blank"><img src="http://img80.imageshack.us/img80/9811/1313188tg1.th.gif" border="0" alt=""></a>
close-up of diaphragm/pilot side of valve
<a href="http://img207.imageshack.us/my.php?image=1313187rp5.gif" target="_blank"><img src="http://img207.imageshack.us/img207/7943/1313187rp5.th.gif" border="0" alt=""></a>
115 PSI shot through 3 layers of 1/4" Masonite particle board
<a href="http://img155.imageshack.us/my.php?image=1323203rw4.gif" target="_blank"><img src="http://img155.imageshack.us/img155/1443/1323203rw4.th.gif" border="0" alt=""></a>
Backside of above shot
<a href="http://img291.imageshack.us/my.php?image=1323204as0.gif" target="_blank"><img src="http://img291.imageshack.us/img291/9867/1323204as0.th.gif" border="0" alt=""></a>
<a href="http://www.youtube.com/watch?v=U17t8x4BUes">Paintball at 100PSI Video</a>
</i>
<b><u>Test Results:</u></b>
<TABLE>
<TR>
<TD><b>Pressure</b></TD>
<TD><b> Speed (FPS)</b></TD>
</TR>
<TR>
<TD>40</TD>
<TD>547.7</TD>
</TR>
<TR>
<TD>45</TD>
<TD>581.7</TD>
</TR>
<TR>
<TD>82</TD>
<TD>697.6</TD>
</TR>
<TR>
<TD>100</TD>
<TD>771.0</TD>
</TR>
<TR>
<TD>115</TD>
<TD>810.0</TD>
</TR>

</TABLE>
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Last edited by Zorrowannabe9 on Sun Dec 10, 2006 2:45 am, edited 2 times in total.

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Unread postAuthor: squeaks » Tue Dec 05, 2006 12:59 am

So does this gun work anywhere near as well as a piston valve gun? I'm assuming that you're design works a lot better than a modded sprinkler though since all a sprinkler is is a diaphrahm, just a much smaller seat.
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Unread postAuthor: Zorrowannabe9 » Tue Dec 05, 2006 1:03 am

ive never made a piston valve. but i will be doing chrony tests soon
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Unread postAuthor: killagorrila99 » Tue Dec 05, 2006 1:27 am

Look's like iplex parts... But your not aussie. unless OH GOD!

enough rambling, I like it. Dont use it for paintballing though :roll:
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Unread postAuthor: Zorrowannabe9 » Tue Dec 05, 2006 1:52 am

haha, thnx killa. I wasnt planning on taking this to any paintball field...might hurt a "whee bit."
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Unread postAuthor: killagorrila99 » Tue Dec 05, 2006 1:55 am

Haha, After seeing what this can do everyone on the opposition would forfit!
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Unread postAuthor: PVC Arsenal 17 » Tue Dec 05, 2006 4:52 pm

Nice design. Really original. I've always loved diaphragm guns- made 4 so far and more to come. But I never thought of using a union before!
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Unread postAuthor: Zorrowannabe9 » Sun Dec 10, 2006 2:50 am

Bumping, added a video of it shooting at 100PSI, a couple dmg shots, and some chrony tests.

I would love to know how other peoples paintball cannons compare.
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Unread postAuthor: MrCrowley » Sun Dec 10, 2006 3:27 am

I just made a paintball gun(SG Paintball gun)
ill try put up a vid at 100psi for you to compare.
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Unread postAuthor: Zorrowannabe9 » Sun Dec 10, 2006 4:31 pm

yea i saw that cannon, looked nice.
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Unread postAuthor: zeigs spud » Fri Dec 29, 2006 10:11 pm

neeto cannon lol
that a bad camera or at night? the pic looks weird with the tints and colors.
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Unread postAuthor: Zorrowannabe9 » Sat Dec 30, 2006 12:11 am

the close-ups and the damage shots were done at night, or in my room so the lighting is a bit strange
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Unread postAuthor: killagorrila99 » Tue Jan 09, 2007 5:41 am

I'm thinking about making one of these. Any input?
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Unread postAuthor: Zorrowannabe9 » Wed Jan 10, 2007 9:50 pm

find a good material for your diaphragm. The tire inner tube I used broke, which shot me with a paintball. I also suggest NOT using the T like I did, rather use a bushing and go to a smaller pipe diameter (maybe 1/2") then do the T to however many adapters you need (vent, fill, guage)
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