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2 questions, newbie help

A place to ask general spud cannon related questions.
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2 questions, newbie help

Unread postAuthor: Captain Tech » Sun Apr 03, 2011 6:10 pm

I was wondering if there was any write ups for how to actually build a back pressure tank as seen here:

http://www.spudfiles.com/forums/piston- ... t8157.html

The theory is much easier than the actual build.



Also, what would be the easiest type of semi automatic airgun to build?
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Unread postAuthor: clemsonguy1125 » Sun Apr 03, 2011 6:22 pm

I dont understand what you mean by back pressure tank? Do you mean a piston valve? As for easiest semi auto, Id say a QEV with a slide valve trigger hooked up to either regulated HPA or a compressor.
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Unread postAuthor: Captain Tech » Sun Apr 03, 2011 6:48 pm

clemsonguy1125 wrote:I dont understand what you mean by back pressure tank? Do you mean a piston valve? As for easiest semi auto, Id say a QEV with a slide valve trigger hooked up to either regulated HPA or a compressor.


Hey, sorry. I'm a nerf modder so my terms are a bit different.
Yes I mean the piston valve. The kind where you have to exhaust a little air to release alot of air.

Also, could you provide a link to an example of a QEV with a slide trigger? I don't fully understand.
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Unread postAuthor: saefroch » Sun Apr 03, 2011 6:58 pm

Clemsonguy is very correct, the easiest type of sem-auto is a QEV with a slide valve, or possibly a homemade springloaded piston valve, but that require more building.

Right here. Both the QEV and slide valve are purchased.
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Unread postAuthor: Captain Tech » Sun Apr 03, 2011 7:04 pm

saefroch wrote:Clemsonguy is very correct, the easiest type of sem-auto is a QEV with a slide valve, or possibly a homemade springloaded piston valve, but that require more building.

Right here. Both the QEV and slide valve are purchased.


Hmm...I see, but that doesnt really explain how to connect everything. I can't seem to find a how-to on a QEV w/ slide valve blaster/gun/cannon/whatever you wanna call it.
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Unread postAuthor: Gun Freak » Sun Apr 03, 2011 7:13 pm

There's no tutorial because all you do is buy the parts and thread them together lol :lol:
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Unread postAuthor: clemsonguy1125 » Sun Apr 03, 2011 7:39 pm

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Unread postAuthor: Captain Tech » Sun Apr 03, 2011 7:45 pm

Hmmm...Well what does the term "piloted" mean?
In these posts they are saying the QEV is piloted by a slide valve, what exactly does that mean?
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Unread postAuthor: clemsonguy1125 » Sun Apr 03, 2011 7:48 pm

Piloted means the air behind the piston is released, the slide valve is the valve the pilots the piston valve
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Unread postAuthor: Gun Freak » Sun Apr 03, 2011 7:49 pm

Pilot is just another word for trigger.
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Unread postAuthor: Captain Tech » Sun Apr 03, 2011 7:51 pm

God, I feel stupid. I hate being new to things....

What type of slide valve am I looking for?

One such as this:
http://www.nexternal.com/poolcenter/ima ... 502S-l.jpg

Or one such as this:
http://t2.gstatic.com/images?q=tbn:ANd9 ... pUsuTqzTbA


Or a completely different wrong and I'm a dumbass?
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Unread postAuthor: Gun Freak » Sun Apr 03, 2011 8:31 pm

The second one looks right. Here is one:
http://cgi.ebay.com/New-Paintball-Gun-Slide-Check-Air-Release-Valve-NPT-/270725127540?pt=LH_DefaultDomain_0&hash=item3f08799d74
Heck I might buy one of those anyway... 9 bucks, its pretty nice too.
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Unread postAuthor: jackssmirkingrevenge » Sun Apr 03, 2011 10:53 pm

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