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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: nabu92 » Sat Feb 02, 2008 12:42 am

This is my 1st Pneumatic, I would like to thank everyone on spudfiles for helping me.

DPS-1 is a simple pneumatic made with Sch 40 PVC and a modded Sprinkler valve. I know the valve should've gone on the other side but I didnt' know if my fittings were pressure rated.

Chamber- 2'x4'' PVC
Barrel- 5' 6'' x 1 1/4'' PVC


Full Pic http://i98.photobucket.com/albums/l250/ ... G_0783.jpg
Valve http://i98.photobucket.com/albums/l250/ ... G_0775.jpg
Full Pic http://i98.photobucket.com/albums/l250/ ... G_0785.jpg

Here's some ammo that I made, its frozen 1'' PVC filled with airsoft bbs. It shatters on impact and owns everything around it. :lol:

http://i98.photobucket.com/albums/l250/ ... G_0789.jpg

I'll have damage pics and vids soon.
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Unread postAuthor: hi » Sat Feb 02, 2008 1:20 am

hey its pretty good for a first, i would turn the valve 90 degrees so you could shoot it like a rifle. its neatly done and looks good.
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: J-MAN » Sat Feb 02, 2008 7:59 am

i like it really good job for a first i like the look but yeah i would rotate the valve 90 degrees to
it is really good
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Unread postAuthor: frogy » Sat Feb 02, 2008 9:49 am

This gun should work great. I like the paintjob also.

Just a few pointers.
Try to make your barrel supports the proper length so they support the barrel straight, instead of bending it downwards.

Try to make all taps through double layers of PVC, so they're is more for the threads to hold onto and less change of shootout.

Normally a ball valve\male quick connect is used instead of a female quick connect, but it should work fine...

I also suggest turning the sprinkler valve about 90 degrees do the "trigger" (blowgun) is facing straight down and you can shoulder-fire it like a riffle.
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I wish people would stop needing a better signature!
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Unread postAuthor: bigbob12345 » Sat Feb 02, 2008 9:59 am

That looks really good
but the sprinkler valve might be constricting flow a little
if you have a chamber that big a 2in piston valve would be better
I would recomend you increase the barrel size to 1.5in or even 2in
or just make it a lot longer so you dont waste so much energy
other than that it looks really good (and quite big)for a first.
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