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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: jackssmirkingrevenge » Sun Oct 28, 2007 3:49 am

Glad to still be able to make the snide sort of comment that DR is happy to illustrate :)
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Unread postAuthor: Acdcmonkey1991 » Sun Oct 28, 2007 9:06 am

Nice gun! Very clean construction, looks very professional. To bad you can't use it at max power though. :( Where did you get that sprinkler valve and how much was it?
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VH was awesome!!
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Unread postAuthor: PVC Arsenal 17 » Sun Oct 28, 2007 10:06 am

DR wrote:If you were to install an adapter on the pilot (3/8"NPT to 1/4"NPT) and install a blowgun (either directly or remote) you would actually gain a little extra performance AND make the launcher much easier to launch by hand. (Merely a friendly suggestion).
~DR.



Hmm. I always thought a faster pilot would yield better performance. How does that work? I'll definitely look into it.
And about the C:B- was I completely off or is it ok? I never bothered to put any thought into it!

I haven't built anything else in a while except this. It's a lung-less blowgun!

Thanks for the comments everyone!
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Unread postAuthor: DR » Sun Oct 28, 2007 2:33 pm

PVC Arsenal 17 wrote:
DR wrote:If you were to install an adapter on the pilot (3/8"NPT to 1/4"NPT) and install a blowgun (either directly or remote) you would actually gain a little extra performance AND make the launcher much easier to launch by hand. (Merely a friendly suggestion).
~DR.



Hmm. I always thought a faster pilot would yield better performance. How does that work? I'll definitely look into it.
And about the C:B- was I completely off or is it ok? I never bothered to put any thought into it!


There's just no way that you could possibly open the 3/8" ball valve fast enough, to benefit from any increase in flow, than you could by actuating the valve with a blowgun setup.

I've actually vented 3" Irritrol valves with a 1/4" blowgun, with very good results. Bottom line; it just makes it far easier to trigger your valve.
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Unread postAuthor: spanerman » Sun Oct 28, 2007 2:37 pm

a 1/4 or 3/8 QEV would be enough...and nice and compact..and still be used with a blowgun
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Unread postAuthor: PVC Arsenal 17 » Mon Oct 29, 2007 5:28 pm

@DR: How exactly does the 3" Irritrol 100 Series equilize it's chamber and exhaust volumes? Several posts back Woffer said that his valve did not have an equilization hole or even a hose connecting the two ports with a valve in the middle; he had to make one. I'm curious how it could work then without some sort of modification like he did.
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Unread postAuthor: woffer5698 » Mon Oct 29, 2007 5:43 pm

Image

Na it came with a hose that ran from the in, to the solenoid, to the out like the valve on the right.
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Unread postAuthor: PVC Arsenal 17 » Mon Oct 29, 2007 5:44 pm

Oh.... I thought you said it had nothing at all.

Well that explains it.

Now I just need to get my hands on one of those beasts!
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Unread postAuthor: Acdcmonkey1991 » Mon Oct 29, 2007 5:47 pm

Where did you get the valve and how much was it?
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Unread postAuthor: woffer5698 » Mon Oct 29, 2007 5:47 pm

i actually learned how to do it from remembering the set up DR had on his YAPOS on spudtech. The barrell and chamber volume are also exactly the same, except he has a 6'' chamber and i have a 4''.
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Unread postAuthor: PVC Arsenal 17 » Tue Oct 30, 2007 2:15 pm

Acdcmonkey1991 wrote:Where did you get the valve and how much was it?


eBay- cheap
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Unread postAuthor: PVC Arsenal 17 » Sun Dec 02, 2007 5:00 pm

Just a video I've been forgetting to post:

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Unread postAuthor: Maniac » Sun Dec 02, 2007 5:15 pm

hey can you post it from youtube because they never work for me from phtobucket or image shack
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Unread postAuthor: MrCrowley » Sun Dec 02, 2007 5:18 pm

Right click on it, and then click open in new tab or window.
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Unread postAuthor: SpudBlaster15 » Sun Dec 02, 2007 5:25 pm

How much pressure was in the chamber when you fired the shot at the pumpkin? Didn't seem like much, as when I shot a pumpkin with my advanced combustion launcher, it ended up in about 10 pieces.
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