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My First 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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My First Gun

Unread postAuthor: squidchicken » Sat Mar 26, 2011 4:25 am

hey guys, first post on spudfiles, been lurking since like last year and couldn't be bothered posting a gun until now. Its made from copper its got a 3/4" piston, all I can think of atm. image quality is crap but you get the picture, atm I have no pump, any criticism welcome, not that impressed by the performance anyway. It can shoot through a medium size phone book but haven't had much projectiles to shoot from since the barrel is quite small, I can attach a 6mm barrel in which case I can get 2 nice shots which can penetrate a 1b5 book. heres some pics if they work properly
Forgot to mention that in a few pics the chamber was bent but I changed it straight. Oh also I have a fire extinguisher bottle that goes to maybe 300psi thats pretty powerful but takes to long to pump for 1 shot so I dont bother.

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Unread postAuthor: CommanderI » Sat Mar 26, 2011 4:53 am

Nice done! 8)

Just put the FE in front of your chamber within the ballvalve.
So you've got a air reservoir.

Nice regards
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Unread postAuthor: mark.f » Sat Mar 26, 2011 7:05 am

Nice first. What type of pump did you have to use with this, and what are you going to do about your next pump?

As to the chamber, I would have bent it closer to the elbows and made it run closer to the bottom of the barrel. :lol:
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Unread postAuthor: squidchicken » Sat Mar 26, 2011 3:56 pm

making my own stirup pump when my friend finishes making a piston cast for it, cant afford a shock pump when they cost $50
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Unread postAuthor: saefroch » Sat Mar 26, 2011 4:18 pm

What diameter will the stirrup pump head be?
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Unread postAuthor: squidchicken » Sat Mar 26, 2011 4:22 pm

head ? not sure what your asking the diameter of the shaft is 12mm or so, its extremely small but I dont have any money to spend on a pump and copper since its expensive as hell here in nz. Been using the left over copper from our house piping
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Unread postAuthor: saefroch » Sat Mar 26, 2011 5:22 pm

The pump head is what moves to compress the air in the pump. The diameter of the pump head is the inner diameter of the shaft. That 12mm is ID, right?
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Unread postAuthor: squidchicken » Sat Mar 26, 2011 5:24 pm

ohhh right yea pump head will be the same as the ID since Im making a cast out of the shaft of the pump
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Unread postAuthor: Gun Freak » Sat Mar 26, 2011 10:05 pm

Cast pistons aren't the best to use in pumps... most people use floating o-rings in order to get the check valve effect; how are you going to achieve said effect?
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Unread postAuthor: squidchicken » Sat Mar 26, 2011 10:31 pm

http://www.spudfiles.com/forums/easy-st ... 13277.html piston at the top and o ring at bottom
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Unread postAuthor: Gun Freak » Sun Mar 27, 2011 10:06 am

Touché 8) Well you will be happy with your gun's performance at 400 psi :wink:
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Unread postAuthor: squidchicken » Thu Mar 31, 2011 1:42 am

updated the gun, now the thing that the piston slides on dunno what thats called but now its wayy bigger so better airflow , so I see my gun soooo much more powerful than before here are some pics
Image

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Image

made it with a 15mm connector epoxyed down into a 3/4 to 1/2
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Unread postAuthor: Crna Legija » Thu Mar 31, 2011 3:30 am

do you mean seals on? thats called a seat.
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Unread postAuthor: squidchicken » Thu Mar 31, 2011 5:21 am

cool never knew that was what it was called, might upload some damage vids sometime but not really impressive compared with other guns around here
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Unread postAuthor: ilovefire » Thu Mar 31, 2011 5:28 am

squidchicken wrote:cool never knew that was what it was called, might upload some damage vids sometime but not really impressive compared with other guns around here


dosent matter how how impressive it it compared to other guns if it did then none of our stuff would be here couse there is always something better, aslo we love to see sh*t destroyed dosent matter what dose it, by the way it looks like a great gun
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why make it if it dosent shoot?
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