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Watto's Sprinkler Cannon

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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Watto's Sprinkler Cannon

Unread postAuthor: watto » Mon Oct 01, 2007 9:11 pm

Well my gun is pretty much finished, I might give it another coat of paint if I get a chance and I'm still waiting on a green laser laser pointer which I'll use for aiming but apart from that shes done.

The 40mm barrel is 110cm long and the 80mm chamber is about 40cm. All the pipe is class18 (~Sch80)

I've only shot it at about 70PSI probably with a bike pump, but I'm going to buy a little compressor today. All shots in the video are potatoes at around 40PSI except the wooden steak.

[youtube]http://www.youtube.com/watch?v=ySttygB_gCw[/youtube]
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Unread postAuthor: mopherman » Mon Oct 01, 2007 9:51 pm

This cannon look quite nice. I would replace the reducer (is that a reducer?) with a reduce bushing and replace the tape with a hose clamp.
very clean and pro looking :thumbright:
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Unread postAuthor: Lentamentalisk » Mon Oct 01, 2007 10:06 pm

Nice gun, but horid font size and color! 12pt black is the default for a reason...
how big is that sprinkler valve flow wise?
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Unread postAuthor: watto » Mon Oct 01, 2007 11:32 pm

mopherman wrote:This cannon look quite nice. I would replace the reducer (is that a reducer?) with a reduce bushing and replace the tape with a hose clamp.


I can't find a hose clamp big enough anywhere. How on earth would I swap the reducer for a reduce bushing when its all glued? And why would I want to? Is a reduce bushing stronger or something?

mopherman wrote:very clean and pro looking :thumbright:


Thanks m8 :thumbright:
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Unread postAuthor: MrCrowley » Mon Oct 01, 2007 11:36 pm

Cut it off, 99% of the time bell reducers aren't pressure rated, bushings are.
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Unread postAuthor: watto » Mon Oct 01, 2007 11:37 pm

Lentamentalisk wrote:horid font size


Small computer screen :lol: :lol: :lol: :lol:


Lentamentalisk wrote:how big is that sprinkler valve flow wise?


25mm or one inch
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Unread postAuthor: watto » Mon Oct 01, 2007 11:40 pm

MrCrowley wrote:Cut it off, 99% of the time bell reducers aren't pressure rated, bushings are.


That reducer is class 18 or PN18 or something close to american Sch80. The parts are from a specialist plumbing store not bunnings or some hardware place, they look double or triple the thickness of DWV.
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Unread postAuthor: spudgunnerwryyyyy » Mon Oct 01, 2007 11:46 pm

Nice gun, my first sprinkler gun was very close to that. Great job, the reducer does look like it isn't dwv. So I would say over one of the cleanest over under's with a sprinkler valve ever. :D
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Unread postAuthor: jackssmirkingrevenge » Mon Oct 01, 2007 11:57 pm

More pressure! You should be taking that to at least 150 psi, buy yourself a decent strirrup pump and exploit the power potentail ;)
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Unread postAuthor: spudgunnerwryyyyy » Tue Oct 02, 2007 12:01 am

Yah, i agree with jackssmirkingrevenge, more pressure=more bueno
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Unread postAuthor: watto » Tue Oct 02, 2007 1:41 am

spudgunnerwryyyyy wrote:I would say over one of the cleanest over under's with a sprinkler valve ever. :D


Wow thanks :shock: :o :D , this is my first proper pneumatic I had a dodgy little ball valve gun ages ago but the cops took it. I might try to make some kind of piston gun next, now I've got the hang of it, I have 60cm of class 18 80mm left over and a few other bits and pieces.
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Unread postAuthor: watto » Tue Oct 02, 2007 1:45 am

jackssmirkingrevenge wrote:More pressure! You should be taking that to at least 150 psi, buy yourself a decent strirrup pump and exploit the power potentail ;)


I bought a compressor today it plugs into your cars cigarette lighter and I've strapped it into the boot and ran the wires under the kick panels so you just plug it in up the front wait a minute or so then go check it, it goes really slow but the guy charged me half price for some reason so it was only 12 bucks.

I might get really good stirrup pump as well to use when I'm away from the car
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 02, 2007 1:58 am

A stirrup pump is much faster and not really that much of an effort.
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Unread postAuthor: dauphinoise potato » Tue Oct 02, 2007 11:14 am

I agree with jack get a stirrup pump. If you have a 12volt car battery charger you can clip it on to the ciggy lighter and it will work fine.
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Unread postAuthor: MrCrowley » Tue Oct 02, 2007 11:21 am

watto wrote:
jackssmirkingrevenge wrote:More pressure! You should be taking that to at least 150 psi, buy yourself a decent strirrup pump and exploit the power potentail ;)


I bought a compressor today it plugs into your cars cigarette lighter and I've strapped it into the boot and ran the wires under the kick panels so you just plug it in up the front wait a minute or so then go check it, it goes really slow but the guy charged me half price for some reason so it was only 12 bucks.

I might get really good stirrup pump as well to use when I'm away from the car


Get a stirrup, car air compressors are worse then bike pumps and just as slow, they require more effort to get going then a stirrup would to fill the chamber with 100psi :P

They usually break before 100psi.
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