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fatcat's sniper

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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fatcat's sniper

Unread postAuthor: fatcat » Sat Feb 16, 2008 7:25 pm

I finally got time to post my new sniper cannon so here it is

Image

It took about three days to complete because i accidently got a valve with a guide rod and had to remove it. Two days later a leak developed in the valve which took another two days to fix (a leak developed in the epoxy sealing a hole in the valve) it still leaks but it is not serious enough to affect performance. any ideas?


Image
baby added for scale
Image
closeup of the valve

Specs
Barrel: 1/2" by 3.5'
Modded 1" sprinkler valve
Muzzle velocity is between 500-600fps @ 120 psi

I am planning on rifling the barrel and adding sights or a scope to improve accuracy

i will post damage pics as soon as i get some more marbles (I shot them all last night)

EDIT: ok damage pics are up

Image

Image
I shot a 1/2" piece of scrap wood with a AA battery
the wood shattered and the battery got squashed and leaked so i had to toss it.
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Last edited by fatcat on Sun Feb 17, 2008 11:13 pm, edited 1 time in total.
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Unread postAuthor: bigbob12345 » Sat Feb 16, 2008 7:29 pm

I like it.
nice and simple and very clean construction.
And who is that awsome little kid in that picture.Brother,Son.
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Unread postAuthor: fatcat » Sat Feb 16, 2008 7:31 pm

thats actuallly my little sister
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Unread postAuthor: Velocity » Sat Feb 16, 2008 7:31 pm

Looks really great! Appears to be very ergonomic. But why take all of the time and effort to have a baby to use as a scale? Just use a ruler or something :) .

The design is great. The only thing that I would do would be to add a paintjob. Before you do so, however, you may want to consider getting some epoxy putty and molding it into that gap between the tee and the elbow leading to the sprinkler valve. I only say this because butted up fittings look really nice, and the epoxy would create the impression that all of the fittings were butted up. Even without the epoxy, a nice paintjob would definitely make this launcher even greater than it is already.

Great build.
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Unread postAuthor: Mitchza89 » Sat Feb 16, 2008 8:22 pm

That's a really cool design mate. I'll have to base my next design off it. (If thats ok with you :D.)
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Unread postAuthor: pizlo » Sun Feb 17, 2008 9:03 pm

Thats almost exactly what I had in mind for my next gun, except My barrel will be below my chamber, and I will have interchangeable barrels. I can't give up my 20 marble milkcap saboted rounds just yet.
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Unread postAuthor: STHORNE » Sun Feb 17, 2008 9:06 pm

You sure you mean "scale" when your talking bout your baby sister and not "target" lol, jk. nice gun though.

with a kewl onyx black (1st coat silver, then light coat of black) paint job and a laser/red dot sight...you would have yourself one bad ass rifle. :headbang:
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Unread postAuthor: jackssmirkingrevenge » Sun Feb 17, 2008 10:54 pm

Is the kid with spec ops or is she wearing a pair of these :D

*ahem*

nice rifle, le damage pis s'il vous plait :)
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Unread postAuthor: fatcat » Sun Feb 17, 2008 11:16 pm

Damage pics are up
the hole was already there bcause it was just a piece of scrap wood
I was thinking of putting a $10 walmart scope on it or making my own
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Unread postAuthor: ghostman01 » Fri Feb 22, 2008 6:29 am

i bought one of the 6$ ones from walmart when i was in the states and brought it back to australia there pretty crap ! lol thell do for a spuddy
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Unread postAuthor: Hotwired » Fri Feb 22, 2008 9:15 am

I gave that plank a suspicious examination on initially seeing a 2" hole clean through it :wink:

Found what I expected beside it though. It's fun cracking planks with a spudgun :)
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Unread postAuthor: bigbob12345 » Fri Feb 22, 2008 9:40 am

Most spudguns that size wouldnt be able to crack the plank.
Do you know how many ci the chamber is?
If not could you give me the dimensions of the chamber.
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Unread postAuthor: Ragnarok » Fri Feb 22, 2008 10:27 am

bigbob12345 wrote:Most spudguns that size wouldnt be able to crack the plank.

It's not too difficult woo 900 fps :twisted: Brute force and ignorance always win out.

I do have a slight worry about the position of this launcher's fill valve. If that were to come free - which isn't impossible - then it would presumably shoot back into your face. The chamber endcap would have been a better place, but not much that can be done now.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: fatcat » Sat Feb 23, 2008 2:47 pm

Image

this is the kind of valve i am using. I dont think it has much chance of blowing out.

The endcap would have been a better place but I didn't think about it untill it was assembled :oops:
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