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Metal cannon design help.

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: Zeus » Thu Sep 27, 2012 5:36 pm

Now you're going to have to strip the paint, get it welded, then the whole tank has to be painted, because there's going to be holes burned into the paint.

Listen to Dewey, he's a clever bloke, and he knows what he's talking about.
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Last edited by Zeus on Thu Sep 27, 2012 6:01 pm, edited 1 time in total.
/sarcasm, /hyperbole
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Unread postAuthor: mattyzip77 » Thu Sep 27, 2012 5:39 pm

Ohhhhh noooo!!! We have a jsefcik junior on our hands!!!!!! :lol:
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Unread postAuthor: 8tonsemi » Thu Sep 27, 2012 5:57 pm

Sorry I thought I was doing a good thing. But then i realized I messed up. What should I do.

(edit) i painted the inside not the outside.
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Unread postAuthor: Zeus » Thu Sep 27, 2012 6:02 pm

8tonsemi wrote:Sorry I thought I was doing a good thing. But then i realized I messed up. What should I do.

(edit) i painted the inside not the outside.


Gee whizz, I wonder what I posted up the top?

Work on your reading comprehension dude.
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/sarcasm, /hyperbole
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Unread postAuthor: 8tonsemi » Thu Sep 27, 2012 6:11 pm

Sorry man I didn't thoroughly read your post and how do you strip the paint from the inside?
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Unread postAuthor: Zeus » Thu Sep 27, 2012 6:14 pm

Just a wire wheel where the welds will go, make sure there's plenty of room around it for the weld. Leave the paint on the inside, but you're going to have to repaint the whole thing again.
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Unread postAuthor: 8tonsemi » Thu Sep 27, 2012 6:19 pm

Thanks zeus I thought I had to chip off the paint on the inside :lol:

I just checked how my paint was doing in my tank and I realized it was sill wet so i was able to wipe off the under the top and down the sides just not the bottle the absolute bottom. Now the thing i have to worry about is getting the steel wool hairs out of the tank.
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Unread postAuthor: jackssmirkingrevenge » Fri Sep 28, 2012 2:05 am

8tonsemi wrote:Now the thing i have to worry about is getting the steel wool hairs out of the tank.


Fill it, dump it, voila. Air pressure is g-r-r-r-reat!

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Unread postAuthor: mattyzip77 » Sat Sep 29, 2012 9:46 am

that was a little gay........ :D :D :D :D
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Unread postAuthor: AircannonSweden » Sat Sep 29, 2012 4:16 pm

I just came up with an idea :P Don't take this serious,i made it in like 5 minutes and if you have a question: ask ;)

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As always,have a nice day - FPSrussia
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Unread postAuthor: 8tonsemi » Sun Sep 30, 2012 8:16 am

AircannonSweden wrote:I just came up with an idea :P Don't take this serious,i made it in like 5 minutes and if you have a question: ask ;)

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Brilliant :lol: ( I'm being serious)
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Unread postAuthor: AircannonSweden » Sun Sep 30, 2012 9:23 am

8tonsemi wrote:
AircannonSweden wrote:I just came up with an idea :P Don't take this serious,i made it in like 5 minutes and if you have a question: ask ;)

Image


Brilliant :lol: ( I'm being serious)


Hehe thank you :wink:
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Unread postAuthor: dewey-1 » Sun Sep 30, 2012 11:00 am

AircannonSweden wrote:I just came up with an idea :P Don't take this serious,i made it in like 5 minutes and if you have a question: ask


Personally I think that is more work and a less flexible design than just using a tank and a merchant coupling.
You need to make a cut on the tank and a cut on the nipple.
With a merchant coupling you only need to make one cut and that is on the tank.

Adding a hole for a fill valve at the back of the tank is not a good idea because it reduces the strength integrity of the tank.

Here a 1-1/2 inch merchant coupler welded to a 4.25 inch diameter fire extinguisher.
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Unread postAuthor: AircannonSweden » Sun Sep 30, 2012 2:17 pm

dewey-1 wrote:
AircannonSweden wrote:I just came up with an idea :P Don't take this serious,i made it in like 5 minutes and if you have a question: ask


Personally I think that is more work and a less flexible design than just using a tank and a merchant coupling.
You need to make a cut on the tank and a cut on the nipple.
With a merchant coupling you only need to make one cut and that is on the tank.

Adding a hole for a fill valve at the back of the tank is not a good idea because it reduces the strength integrity of the tank.

Here a 1-1/2 inch merchant coupler welded to a 4.25 inch diameter fire extinguisher.


Yes i know it is much work...
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