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1st cannon... almost done

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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1st cannon... almost done

Unread postAuthor: JDAX23 » Sun Jan 13, 2008 11:57 pm

<a href="http://s227.photobucket.com/albums/dd51/bigtundra2332/?action=view&current=0113082143.jpg" target="_blank"><img src="http://i227.photobucket.com/albums/dd51/bigtundra2332/0113082143.jpg" border="0" alt="Photobucket"></a>


<a href="http://s227.photobucket.com/albums/dd51/bigtundra2332/?action=view&current=0113082139.jpg" target="_blank"><img src="http://i227.photobucket.com/albums/dd51/bigtundra2332/0113082139.jpg" border="0" alt="Photobucket"></a>


i just need to screw the valve to the barrel... how does it look so far
for some reason i dont feel confident in my modded valve/blowgun all i had to do was screw the gun in right?

any suggestions or critisism is appreciated

the specs are
barrel- 1.5" by 5 ft
chamber- 2" by 3 ft
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Unread postAuthor: Isomer » Mon Jan 14, 2008 12:17 am

I like it! Extremely nice for a first! Make sure to add a barrel support. Flow may be a problem but I don't think you'll be able to notice it, seeing how it's your first. Maybe add a breech loader because the barrel is so long.
**On the Sprinkler Valve-you're going to want to plug the solenoid hole or it won't work, air will just rush out**
Good job! Some black spray paint would finish it off nicely!
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Unread postAuthor: JDAX23 » Mon Jan 14, 2008 12:19 am

hey thanks for the positive feedback... i already filled the solenoid hole with epoxy and ya i want to paint it either a dark grey or black... and what is limiting the air flow?
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Unread postAuthor: Isomer » Mon Jan 14, 2008 12:23 am

the limited airflow comes from:
1. the sprinkler valve (actually not too bad) but when upgraded to a piston or QEV, the difference is noticable
2. The fact that the ports on the sprinkler valve (.75"?) are smaller than your barrel (1.5"). So basically, you're constricting flow just to release and expand it.
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Unread postAuthor: JDAX23 » Mon Jan 14, 2008 12:25 am

o ok i see what your saying... the valve is an inch by the way but that makes sense... i can make interchangable barrels though so would it be better to go down to and inch or smaller?
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Unread postAuthor: Isomer » Mon Jan 14, 2008 12:38 am

nah, you're fine with the 1.5" but you might want to make a .5" or .75" barrel just to shoot smaller stuff. The flow isn't too much of a problem, just not optimal...I would keep it as is. Sorry to throw you off-guard.
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Unread postAuthor: JDAX23 » Mon Jan 14, 2008 12:42 am

haha its cool dont worry about it and thanks for the advice
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Unread postAuthor: Maniac » Mon Jan 14, 2008 12:54 am

Looks good. There is one more hole to fill though i is on the barrel side of the sprinkler valve right in side of it the hole is very small. other than that add barrel supports and youll be fine and dandy.
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Unread postAuthor: JDAX23 » Mon Jan 14, 2008 12:56 am

o ya i see it do i just epoxy that as well?
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Unread postAuthor: psycix » Mon Jan 14, 2008 6:32 am

Looks nice, and it will work good, but what is that piece of pipe between the valve and the barrel for?
Couldnt you just put male threads on the barrel and directly screw this into the valve?
It looks like dead space now.
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