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CDAC

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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CDAC

Unread postAuthor: PCGUY » Sat Feb 05, 2005 5:24 pm

<div align="center">CDAC

Copper Diaphragm Air Cannon

Provided By fiebigspudguns - <a href="http://www.geocities.com/fiebigspudguns/">http://www.geocities.com/fiebigspudguns/</a></div>
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Attachments
CDAC3.jpg
CDAC11.jpg
CDAC Vs. Diet Pepsi can.

You can't really tell from the picture but this was an awesome shot! Another 'sniper' job, I got it from about 10 feet back. I hate diet pepsi so much I just couldnt resist! To really appreciate this you need to see the video, i
CDAC10.jpg
CDAC Vs. OFF! Deep Woods can.

I really enjoyed this shot. I set the can on a brick 20 feet out into my yard, I laid down and 'sniped' it with the AA battery used to shoot the microwave. The can was almost completly de-pressurized before I shot it. Unfor
CDAC10.jpg (16.05 KiB) Viewed 5700 times
CDAC6.jpg
CDAC4.jpg
CDAC Vs. My old microwave.

This shot was made from approximately 10 ft. away, using a AA battery. The Microwave was lying on its front, so I was shooting thru the top. As you can see it EASILY penetrated the 2 layers of sheet metal on the top, traveled
CDAC4.jpg (10.75 KiB) Viewed 5700 times
CDAC12.jpg
CDAC13.jpg
CDAC Vs. My old microwave's door.
This was the first shot I made with the CDAC. I used a small lead slug (.75&quot; long) so shoot right through the door of the old microwave. In case you didnt know a microwave door has about 3 layers of lexan and a 1/8&
CDAC9.jpg
The ammo is simply a length of .5&quot; pipe, filled with lead. Unfortunately since this barrel is so short, it is horribly innacurate and doesnt bring the ammo up to full speed.

Since I only resently finished the gun I havent been able to get many dam
CDAC9.jpg (9.82 KiB) Viewed 5700 times
CDAC8.jpg
The other barrel is simply a .5&quot; long coupling. If you dont know what a long coupling is, imagine taking a .5&quot; pipe coupling ans stretching it out to a length of 12&quot;. This barrel is used for shooting special ammunition I make myself.
CDAC7.jpg
As of right now I have 2 barrels for the CDAC. One barrel is just shy of 3' and made of .5&quot; copper pipe. This is the main barrel I use and is incredibly accurate as well as powerful. For ammunition, I have made some of my own lead slugs but theyre a
CDAC7.jpg (6.88 KiB) Viewed 5700 times
CDAC2.jpg
In this picture you can see the rear of the gun, where most of the 'action' goes on (Second only to the barrel) In the middle you see the QEV, it has 1/4 in and out ports, and a 3/8 exhaust. It is cast aluminium and ordered directly from McMaster. Since t
CDAC1.jpg
This is the CDAC, or Copper Diaphragm Air Cannon. It isnt called this because it has a copper diaphragm but rather becasue the gun is made mainly of copper pipe and uses a diaphragm valve. Originally I intended to use a piston valve I made on my own, but
Last edited by PCGUY on Sat Mar 11, 2006 12:10 am, edited 1 time in total.
Yes, I am the guy that owns & operates SpudFiles (along with our extremely helpful moderators).
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Unread postAuthor: theexp » Mon Feb 07, 2005 8:39 pm

THats awsome :shock: , Great Carnage pics :twisted: :evil: . Great Copper cannon.
I like how it has interchangable barrels :D

Real cool :lol:
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<img src="http://www.spudfiles.com/uploader/uploadFiles/post-12-1064980630.gif">

My website www.freewebs.com/potato_cannon/
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Unread postAuthor: foxcrf450rider » Fri May 27, 2005 9:07 am

What kind of valve r u using EXACTLY? can u give the page u got it from?
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Unread postAuthor: spudshot » Fri May 27, 2005 11:02 am

its a 3/8" deltrol QEV from http://www.mcmaster.com
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Unread postAuthor: beebs111 » Thu Aug 25, 2005 3:15 pm

i really want to build 1 of those but i cant find the valve on mcmaster!!!!! :shock: :shock: could someone tell me what category its under or what page its on

by the way my complements on the awesome metal :D
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Unread postAuthor: saladtossser » Tue Sep 06, 2005 6:27 pm

<a href="http://www.mcmaster.com/ctlg/DisplCtlgPage.asp?ReqTyp=CATALOG&CtlgPgNbr=883&CtlgEdition=&sesnextrep=525278491210960&ScreenWidth=1152&McMMainWidth=945">click here</a>
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Unread postAuthor: beebs111 » Wed Sep 28, 2005 2:32 pm

kk thx i got my valve in the mail today and i have all my supplies. i think im going to build it with 1 long chamber instead of 2 also do u use 12 gram co2 to fill it and if so what pressure does it go to
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Unread postAuthor: bubblebathman » Mon Oct 03, 2005 12:38 pm

HOHOHO nice destruction pics maybe shoot a board or somtin but just a thought and NICE GUN MUHAHAHHAHAHHAA :twisted: :mrgreen:
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Unread postAuthor: nano-nater » Tue Nov 22, 2005 4:36 pm

i have a copper diaph gun shoots aa batteries,they really are powerfull.

btw: i broke a window about 1 hour ago by accident (my neighbours i think) i dint locate the window but i herd glass breck i was so scared and ran inside lol!!**also i dint aim the window , the aa batt bounced on the cement wall and hop.. :? :( oh well i hope i see no po-po. :x **
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Unread postAuthor: CS » Wed Nov 23, 2005 2:46 am

Im debating wether or not to delete your post "nano-nater". First of all let me thank for being one of the few people that make the whole of spudgunners look bad. I beleive what you have just barely said is admitting to a crime, perhaps destruction of personal property (not sure). I must ask you one thing though is the "cement wall" that you were shootin at vertical? If so how did it hop? I could see if it roicheted but you said "hop". To prevent future damage I would suggest not to shoot in the direction of houses, other peoples crap, valuable stuff, etc. Dont worry I will proably come back and delete this but Iam dieing for a responce as to why? I hope you dont see the "po-po" either. When I first read it I thought it said poo-poo.
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Unread postAuthor: longshot1068 » Wed Nov 23, 2005 9:17 am

something in that story doesnt pan out, its uncool that you didnt find whos window it was and rectify the situation.

tha t is a cool copper gun tho, pretty great pics too. g/j.
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Unread postAuthor: drac » Wed Nov 23, 2005 2:40 pm

Not cool. You're lucky you didn't get caught, even if it was unintentional, you could still be fined a pretty penny.
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Unread postAuthor: CpTn_lAw » Sat Dec 10, 2005 2:37 pm

i'm wondering how much pressure a 28mm of diameter copper pipe can handle? Cuz i actually have a soda bottle with glued diaphragm valve, and i put it to 60-70 psi, even at these pressures, recoil is substantial and with water, it breaks you the arm!! so how much pressure can 2mm thick copper handle?
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Unread postAuthor: drac » Sat Dec 10, 2005 4:16 pm

500 PSI is a rough guess. Even though, I wouldn't take it above 250 if neccessary.
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Unread postAuthor: boilingleadbath » Sat Dec 10, 2005 5:28 pm

True, the copper may be capable of taking 500 PSI. However, I don't think the valves are rated that high... 250 is pushing it, but shouldn't cause it to fail - most ratings have saftey margins in them.
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