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First semi-good 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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First semi-good gun

Unread postAuthor: Cosmic Muffin » Mon Jan 14, 2008 11:24 pm

ok this is the first time i have tried to post one of my guns so dont get grumpy if it doesnt work. anyway this is it. the barrel is copper pipe sleved in 20mm pvc. the bolt is the 20mm pipe in a 25mm piece with a shaven reducer at one end and another something at the other conecting it to the valve.

the stocked is blocked off with a small disc of pvc which i flattened in the oven. yep the valve is a solenoid one and it took me ages to figure out how to mod it :x

in the future im gonna put in a barrel support ( it really needs one ) and something to cover the end of the barrel where the copper is sticking out
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Unread postAuthor: Thursto » Mon Jan 14, 2008 11:40 pm

I Guess it didnt work, there is no pics?
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Unread postAuthor: MrCrowley » Mon Jan 14, 2008 11:52 pm

Using the Spudfiles uplaoder

When making a new topic in the showcase section, scroll down the page and click browse, and browse your computer for the picture you want to upload, then type it description in the description box and click 'upload' or something similar (don't click submit).

Then do that for all your photos, and then once you're done click submit.
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Unread postAuthor: PCGUY » Mon Jan 14, 2008 11:56 pm

He was having some problems uploading the pictures, however he IM'ed me and we got it all straightened out :-)
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Unread postAuthor: MrCrowley » Tue Jan 15, 2008 12:01 am

Nice job, looks familiar to singularity's 25mm sniper rifle. Did you see it on instructables? :)
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Unread postAuthor: Cosmic Muffin » Tue Jan 15, 2008 12:09 am

i got the idea of the bolt from there but i simplified it so yer but the barrel is actually that copper pipe
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Unread postAuthor: Cosmic Muffin » Tue Jan 15, 2008 12:24 am

its leaking out the valve into the barrel which is really annoying and i had heaps of trouble modding it so i may have screwed something up can you suggest some reasons why it could be leaking anyway?
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Unread postAuthor: MrCrowley » Tue Jan 15, 2008 12:27 am

What pressures is it leaking at?

it may require around 10psi to seal well.

Are you using a bike pump? They can sometimes be tricky to seal with a bike pupm if you have a big chamber or don't pump fast enough.

The diaphragm may of got some dust or pieces of plastic on it when you modded it, make sure it's clean.

You have taken the solenoid out and haven't expoxied the hole up.

That's all I can think of for now.
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Unread postAuthor: Cosmic Muffin » Tue Jan 15, 2008 12:51 am

yer the gun actually works and i run it at 60psi but when i did mod it it copped a fair hiding cos it didnt work the first time and then i played round with it a bit and eventually got it working after drilling then filling multiple holes but i think i found the problem now.
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Unread postAuthor: Thursto » Tue Jan 15, 2008 2:41 am

Now that the pics are upladed, WICKED! Reminds me of Mr. Russ's pneumatic (the stock, the whole layout etc) :P Wicked, love the bolt action, damage pics? and are you aussie by any chance?
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Unread postAuthor: Cosmic Muffin » Tue Jan 15, 2008 6:05 am

yep mate im a true blue Aussie cheers for the comments
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Unread postAuthor: MrCrowley » Tue Jan 15, 2008 6:26 am

Cosmic Muffin wrote:yep mate im a true blue Aussie cheers for the comments


Oh god not another one :D

Only good thing about Aussie, my parents are considering living there for 6months to see how it is, while me and my brother 'look after' the house in NZ :P
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Unread postAuthor: grumpy » Tue Jan 15, 2008 6:30 am

well i have to be grumpy, it's who i am, can't be someone else now can i ?
nice gun by the way, glad you got the leak fixed. how about some damage pics?
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Unread postAuthor: Novacastrian » Tue Jan 15, 2008 6:40 am

MrCrowley wrote:
Cosmic Muffin wrote:yep mate im a true blue Aussie cheers for the comments


Oh god not another one :D

Only good thing about Aussie, my parents are considering living there for 6months to see how it is, while me and my brother 'look after' the house in NZ :P


Cool, maybe you could host a party and advertise it on myspace :P
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Unread postAuthor: clide » Tue Jan 15, 2008 5:20 pm

Novacastrian wrote:Cool, maybe you could host a party and advertise it on myspace :P

Just be sure to wear your <a href="http://au.youtube.com/watch?v=xc0CB6URrV0">famous sunglasses</a>.

Nice gun. How long is your barrel?
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