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Is modding a sprinkler valve nessisary for a newby cannon?

A place to ask general spud cannon related questions.
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Unread postAuthor: Hubb » Fri Nov 30, 2007 10:07 pm

With a foot pump, I don't see that necessary. That is more for persons using a compressor or CO2 / HPA. They leave it connected to eliminate a step.
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Unread postAuthor: BigJon » Fri Nov 30, 2007 10:08 pm

I dont think you need a ball valve after the schrader. I think the only reason that it's used is because when you disconnect the pump, sometimes it lets air out but its not much.
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Unread postAuthor: spudy buddy » Fri Nov 30, 2007 10:12 pm

ya thats what I thought but just wanted to make sure that it wasn't vital. :)
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Unread postAuthor: jimmy101 » Sat Dec 01, 2007 12:08 pm

spudy buddy wrote:jimmy101:Wow that's a nice gun! :shock: It's electric right?BTW is it ABS or PVC?

All PVC (pressure rated sched 40). The power supply is a pair of 9V batteries in series. As others have posted, probably about as expensive to do the electronics as it is to go ahead and mod the valve. Unless you have most of the parts laying around already. (Or, you trash the valve while mod'ing it :() ).Radioshack has the 9V battery clips, several of'm for a buck or two. The box, safety switch (disables the trigger) and power ON light were all stuff I already had. The batteries last pretty much forever so they really don't constitute a recurring cost.

spudy buddy wrote:one last thing-is an electricaly moded solenoid better then a ball valve?

I would say a standard electric valve (no mod'ing) is better than a ball valve, if for no other reason than it will be much more consistent.

A blowgun mod'd sprinkler valve should greatly outperform a ball valve.
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Unread postAuthor: spudy buddy » Sat Dec 01, 2007 3:54 pm

THX jimmy, that was what I was looking for.

Ops. I ment just a non modded valve :oops:

BTW I tried to uplode my plans for my sniper and it told me that I was trying to uplode an empty file. Anyone know what's wrong with it. :cry: It's a file in paint by the way :colors: .
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Unread postAuthor: Hubb » Sat Dec 01, 2007 6:11 pm

spudy buddy wrote:BTW I tried to uplode my plans for my sniper and it told me that I was trying to uplode an empty file. Anyone know what's wrong with it. :cry: It's a file in paint by the way :colors: .


Convert the image from bmp to jpeg using PixRev. The image can then be uploaded.
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Unread postAuthor: spudy buddy » Sat Dec 01, 2007 8:11 pm

THX I did what you said so here are the plans
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Unread postAuthor: Hubb » Sat Dec 01, 2007 8:11 pm

Yeah. The paint program saves in bmp format and this site doesn't support that format.

For reference, here is the list of allowed extension groups and file sizes.

Edit: The design looks good. Remember, you may need to add a ball valve between the chamber and the sprinkler valve to help seat the diaphragm.
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Unread postAuthor: spudy buddy » Sat Dec 01, 2007 9:02 pm

Sry for the bad quality of the top pic, but I think you can make out the basic shape. I'll probbably go with this though now that I know how much better it is :D
I'll probably add some sort of gard to protect the blow gun from being damaged
Edit: Ops :oops: blow gun is on the wrong way.
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Unread postAuthor: jimmy101 » Sun Dec 02, 2007 11:33 am

You can probably omit the "stoppers". Might as well use the the pipe in the "butt" of the gun as part of the air flow path.
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Unread postAuthor: Hubb » Sun Dec 02, 2007 7:10 pm

spudy buddy wrote:I'll probably add some sort of gard to protect the blow gun from being damaged


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Unread postAuthor: spudy buddy » Sun Dec 02, 2007 10:57 pm

Oh, that's cool. I'll probably do that. It's just some PVC with a slot in it right?

Without the stopers wont it be worse because not all the ari will be behind the projectile :?:

Hey does anyone know how much psi I can get with a foot pump?

Edit: BTW what would be the best valve size for a 1/2 barell 2inch chamber?
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