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update: my first air rifle

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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update: my first air rifle

Unread postAuthor: sinper2006 » Thu Jan 17, 2008 1:34 am

heres my first air rifle i no its not the best but i don't care

barrel 10mm X 1m aluminum tube with 20mm pvc pipe around it
valve 3/8 inch ball valve
chamber 3/4 inch x 12 inch pipe
stock a bit of pipe i found

whole gun
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stock
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main part of gun
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update:
i just upgraded my gun i made my chamber bigger and that improved my gun a bit i havn't really tested it because my pump broke :cry: i got a new one that go to 250 psi but my filling valve is only rated to 60 psi i think it is safe to take it to 100 psi. o yea i added a scope i will make a better mount in the future but this does the job.

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future upgrades
-new barrel/breech like http://www.spudfiles.com/forums/tvba-bbs-t3414.html
-3/8" QEV (can anyone can tell me where i can buy one in australia?)
-new scope mount
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Last edited by sinper2006 on Mon Jan 21, 2008 5:38 am, edited 1 time in total.
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 17, 2008 1:37 am

For some reason, I though of the Sten :D

Shame about the ball valve but otherwise, nice effort :) a couple of holes in the barrel will give you an integral suppressor effect if the outer tube is sealed.
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Unread postAuthor: sinper2006 » Thu Jan 17, 2008 1:55 am

lol it does look a bit like the sten. it actually isn't very loud. i'm just wondering if you think it would i would be able to make a piston valve like this http://www.spudfiles.com/forums/100-sea ... t6214.html in a 10mm tee? i goin to put sum damage pics up in sec just need to upload them
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Unread postAuthor: sinper2006 » Thu Jan 17, 2008 2:05 am

damage pic's
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 17, 2008 2:06 am

That would be relatively easy to make, though personally I'd rather have the barrel seal against the lip of the barrel as opposed to inside it, it would be easier to get a reliable seal that way.
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Unread postAuthor: sinper2006 » Thu Jan 17, 2008 2:09 am

ok but i'm goin to be using threaded stuff so i'm thinking if i get that threaded pipe i dunno if its brass i think it is so the piston is in there or would the 10mm tee be big enough?
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 17, 2008 2:13 am

You need your piston to be of a significantly wider diameter that your barrel, if the internal diamterer of the tee is 10mm then it won't work.
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Unread postAuthor: sinper2006 » Thu Jan 17, 2008 2:18 am

ok so i would need 15mm or 20mm tee internal of barrel is bout 7mm so i was going to use a 10mm male to 10mm male then adaptor 10mm female to 10mm female adaptor then 10mm male to 10mm male and barrel is stuck inside that would that work i'll try make a diagram of it but i am not good at it.
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Unread postAuthor: sinper2006 » Thu Jan 17, 2008 2:37 am

would this work?

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Unread postAuthor: jackssmirkingrevenge » Thu Jan 17, 2008 2:56 am

how about this, simpler and more efficient
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Unread postAuthor: sinper2006 » Thu Jan 17, 2008 3:09 am

i'll c i gotta c if i can find small nut steel rod washers for it to go sraght to barrel because it only 7mm also where do u get the rubber stuff?
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 17, 2008 3:40 am

where do u get the rubber stuff?


I get mine from an old truck tire inner tube, works for car tires as well.
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Unread postAuthor: sinper2006 » Thu Jan 17, 2008 3:43 am

i thort that car tires didn't have tubes would a bike tube work? or is it to thin. u have to drill holes in the washers don't u?
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 17, 2008 4:01 am

You can still find tubes, bike tubes are a little thin but you can use several layers.
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Unread postAuthor: sinper2006 » Thu Jan 17, 2008 4:12 am

i was thinking bout 3 for where it connects at the barrel but 7 sounds good for the back one
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