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Pics Update 1/2" copper cannon

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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Unread postAuthor: MrCrowley » Wed May 28, 2008 12:49 am

Is that animation still holding up alright?

Nice fridge compressor....i'm jealous. :(
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Unread postAuthor: Lentamentalisk » Wed May 28, 2008 12:59 am

The animation is Fabulous! I put you in the credits at the end of my presentation, also just for kicks, I added this:
not sure how to embed videos, so its just a link (propane and a balloon = fun)
http://s229.photobucket.com/albums/ee58 ... CT4284.flv
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Unread postAuthor: Lentamentalisk » Wed May 28, 2008 9:41 pm

My presentation went great! My teacher liked it, and my classmates were very impressed.

When I got home I decided to go for serious penetration.
I made this slug ages ago out of a bolt and some nuts, and decided to test it against 1/2" plywood
Image

First entry hole
Image

First exit hole
Image

Second entry hole
Image

Second exit hole
Image

Third entry hole
Image

third exit hole
Image

Then the recoil:
Before:
Image

After:
Image

That cannon was mounted in their pretty tightly, and that doesn't even show how much the whole contraption kicked back.
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Unread postAuthor: Lentamentalisk » Wed May 28, 2008 9:51 pm

Update:
Triple post!
Just shot a penny with a needle.
FUN!
Image
Image
Image

Boom! Head shot. Oh no! They got Lincoln!
right in the jaw... Ouch!
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Unread postAuthor: THUNDERLORD » Wed May 28, 2008 10:15 pm

Great pics and post.
It's good you have a chronograph too.
Glad to hear your demo went well.
I meant to suggest before that you could shoot something if it didn't :P 8)
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Unread postAuthor: Lentamentalisk » Wed Jun 11, 2008 8:43 pm

some very fun and interesting updates I have here.

First of all, I found that my fridge compressor can easily get up to 600psi, it was just starting to slow down when it got to the top of my new gauge.

As for the little metal slug I shot before, I raised the pressure from 300 to 400, and got it cleanly through 4 pieces of plywood this time.

First entry
Image
First exit
Image
Second entry
Image
Second exit
Image
Third entry
Image
Third exit
Image
Fourth entry
Image
Fourth exit
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Attempt at a fifth puncture
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Then I took that sharpened wooden dowel that I already showed you guys, and shot it at a empty can of pinapple. That little piece of wood went straight through both sides of the tin can, and sent the can flying 37' back, all the way to the end of my yard, where it got stopped by the blackberry bushes.

Entry
Image
exit
Image
Image
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Unread postAuthor: VH_man » Wed Jun 11, 2008 9:10 pm

BTW, just a thought:

i have found that when you are doing barrel ---> Fittings that wont take pressure, you can just use superglue. For some reason superglue sticks REALLY WELL to copper. Its just a little easier than sweating the joints.
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Unread postAuthor: Lentamentalisk » Wed Jun 11, 2008 9:42 pm

It is much messier than sweating, and makes it look terrible, though it does require less setup. However, the chances are that if you are sweating something on your barrel, you will also be sweating something that takes pressure, so there is no extra mess, and it is usable in under 5 minutes, as opposed to 30min or what ever.
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Unread postAuthor: blind909 » Wed Jun 11, 2008 11:18 pm

Sweet cannon, that is a nice penetrating slug too!
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Unread postAuthor: Lentamentalisk » Thu Jun 12, 2008 8:23 pm

My friend came over and we had some fun shooting cans with and without ammo.
http://s229.photobucket.com/albums/ee58 ... CT4566.flv
http://s229.photobucket.com/albums/ee58 ... CT4567.flv
<embed>
<embed>
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Unread postAuthor: ALIHISGREAT » Tue Sep 16, 2008 1:25 am

nice cannon, but the spring in the QEV should definitly not be neccesary and is probably harming performance.
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Unread postAuthor: Lentamentalisk » Tue Sep 16, 2008 10:25 pm

thanks, but no. It didn't work without it... as I said, I added an improv spring because it didn't seat on its own. It has no reason to seat if it just sits loosely in there and no pressure builds up behind it, because it all flows past it. Believe me, I would remove it if I could, as I am a total efficiency freak, but I can't.
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Unread postAuthor: BlackH » Wed Sep 17, 2008 2:04 am

:D :D DUDE that coin shot is insane hehehehehehehe :D :D
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Unread postAuthor: Lentamentalisk » Wed Sep 17, 2008 10:01 am

ya, I have a coin on a pin on my cork board :)
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Unread postAuthor: zach12 » Wed Sep 17, 2008 4:34 pm

nice gun. i love your coin slugs. LEATHEL!!! lol.
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