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The PP water gun

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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The PP water gun

Unread postAuthor: )DEMON( » Sun May 07, 2006 6:49 am

I have been here a while and not submitted a gun,so i thought i needed to.My parents paid for this because it doubles as a school project,i did not pay for this myself but at the end of June when it is my birthday i am expecting to get lots of money and then i will make the best paintball gun this forum has seen! :twisted:

Back to the gun,it is very simple,it has a pressure rated skrew on cap at the end so you can fill it with water and a bike tube valve at the TOP so no water can get in it.the chamber is 40mm pressure rated pvc(the whole gun is pressure rated)and it is about 60 cm long. the barrel and ball valve are 90* to the chamber so that all the water can be shot out.The nozzle can be unskewed and replaced with a different one at any time.the barrel is 20mm and i am going to replace it with a long one and fill my chamber with air so it can double as a spud gun and a water gun.

Our school project is about water pressure and crap like that so you can see why i made it.It took less than half an hours work and it was cheep.

I should be getting a pressure guage for it soon and i will put that on the top 'lid'.
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Attachments
the gun.jpg
a pic of the gun in a bathtub
air in valve.jpg
the bike valve
trigger and nozzle.jpg
a ball valve and nozzle
backround.jpg
for those of you that would like to see it sitting on a chair in my garden
business end.jpg
end cap with a hole drilled in it
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Unread postAuthor: Rambo » Sun May 07, 2006 10:12 am

I'm not quite shure about this paint ball plan.If I make my next sniper in to a paint ball gun...
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Unread postAuthor: Jakal444 » Sun May 07, 2006 10:41 am

When I made a water cannon used flexible aquarium tubing between the tank and the nozzle, I then slung the tank on my back and can walk around with it in a comfortable position. But it depends on what you do with the cannon.
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Unread postAuthor: )DEMON( » Sun May 07, 2006 11:17 am

remember i said that is is also for a school project.
AND
Rambo,you make your paintball gun so i have a standard to beat.
*edit*
crap this thing hurls water like 10 metres and i havent even made any adjustments,no pressure guage so it hasnt even been to 35 psi yet.
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Unread postAuthor: PVC Arsenal 17 » Sun May 07, 2006 7:38 pm

Check out my PB gun. It's friggin crazy. If you decide to make one use a different method other than a ball valve.

http://putfile.com/pic.php?pic=4/9517433025.jpg&s=x10
(It's painted now and looks a whole lot better)
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Unread postAuthor: )DEMON( » Mon May 08, 2006 11:18 am

i am sooo happy,i installed a new barrel 40cm long and 20mm in diameter,so far i have shot marbles at 50 psi and they really fly! it is too dark to fire any more over here but i should be able to post some damage pics and some of the pics of the modifications tomorrow
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Unread postAuthor: Jakal444 » Tue May 09, 2006 7:22 pm

One question Demon, how effective was the nozzle you have pictured? what sort of stream did it send out?
I am planning to build a new water cannon and I'm trying to figure out what would make the best nozzle.
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Unread postAuthor: )DEMON( » Wed May 10, 2006 10:57 am

ah,that is a good question, well the nozzle you see there dosnt make a very good stream ,it shoots water in a hard burst like if you try to put your thumb over a hose pipe,it shoots water like 10 metres and makes a big mess.
I still have to make different nozzles but i think you should try to burn a small hole in a end cap or something with a piece of hot wire. a small clean hole should get a steam effect,i am going to try that next.
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Unread postAuthor: Jakal444 » Wed May 10, 2006 11:38 am

Hmm, my last one had a barbed copper nipple on the end but this gave a very limited stream.

Maybe a caulking gun nozzle would work, it is conical so it benefits from the vern effect and you can cut a piece off the end of it to make the hole larger
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Attachments
S1LN0Z_5778.gif
A typical caulking gun nozzle
S1LN0Z_5778.gif (10.44 KiB) Viewed 1873 times
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Unread postAuthor: )DEMON( » Thu May 11, 2006 9:59 am

what about nozzles on toy water pistols and fire hoses? mabey its possible to copy the design of those

MODIFICATIONS!!
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Attachments
mod1.jpg
mod2.jpg
pressure guage
different view.jpg
bit dark
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