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troubles with sleeving barrel

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Unread postAuthor: DR » Thu Mar 22, 2007 2:51 am

DR, your barrels are very nice. Can I purchase one of those fancy barrels at my local hardware store?

No?

Well then, you have the answer to your question.[/quote]

Can't buy 2-1/2" SCH40 PVC Pipe, OR any of its components at the local hardware store, but I have them. - You just have to know where to look and who to ask. :wink:

aturner wrote:People sleeve a GB barrel for the same reasons they build their own spudguns instead of ordering them from any number of websites. I think the "fun" is to take basic materials and make something new.


I know (all too well) about making things from basic materials.
But what fun is to be had beating the piss out of a piece of pipe for 45 minutes???:?
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Unread postAuthor: aturner » Thu Mar 22, 2007 7:50 am

Banging the piss out of pipe? That sounds kinda....funny! :lol:

Anywho, you should give it a try. It only took me about 20 min for a 6 ft barrel. Plus it's a great stress reliever! And a workout!

BTW, one of these days soon I'll be testing one of those molded barrels. Just waiting for the weather to warm up a bit more, as I don't want to launch GB's in my garage :shock:
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Unread postAuthor: BC Pneumatics » Thu Mar 22, 2007 8:45 am

Or just stick the 2" in the sun for a couple of hours. 20' lengths sleeve without use of a mallet, or any other banging. (Sleeving in the winter does suck though)
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Unread postAuthor: wblteen » Sat Mar 24, 2007 4:38 pm

I attempted another mock with much greater success this time. NO GAP!! The golf ball is still a tight fit, but it seems as though it will work. Now I can proceed with the real project, a 4 inch coaxial. Building to begin soon, I already have the fittings just need the pipe. This sleeved pipe is heavy, I am starting to worry about the weight of such a large coaxial. Oh well, it will still be a blast to use.
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Unread postAuthor: MrCrowley » Sat Mar 24, 2007 5:12 pm

Wow, that is nice 8) . Good job on the no gap.
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Unread postAuthor: lukemc » Sat Mar 24, 2007 5:20 pm

how big of a cut did you use to get no gap thats amazing once you finish it damage shots!!
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Unread postAuthor: allthingsgo2 » Sun Mar 25, 2007 4:06 pm

Dr- why do it your self. because it proves you can and your not a noob who just buys it. Self determination is good for spudders.
For the original problem. i would sugjust trying it again i got mine on the first try for my golf ball barrel that is 5' long and is sch 40 2' slipped down the inside of its self i cut approx 7/8 of an inch out of it on the table saw.
I had to make a special jig to hold the pipe straight as well with the blade in a slot at the bottom. to cut it then i used screw clamps to pinch the gap together with a golf ball in it
if the clamps did not have enough pressue to close the gap i used a mapp gas torch to lightly tan the plastic that was being slipped inside of its self.
then closed the gap
Once you have about say a foot inside your pretty much set just take a towel and place it on the ground and slam the sleeve in with the aid of lots of silicone spray.
when i got it all in i found that the sleeve had the slight tendency to slip around inside.
This I could not have. So i also needed a way to prevent my ball from sliding into the chamber. i found that if i drilled a hole thru the end of the pipe to fit a large construction nail I could place said nail thru that hole and cut the ends off then glue my barrel into the chamber.
Its been fired a few times and no ill results have happened
the golf ball is tight the first 8 or so inches then slips tightly down to the base of the chamber.
Is rather loud though. Im being led to believe that my chamber ratio is out of whack.
But i don't know what a good chamber ratio is so i cant put it back into whack.

Hoped i helped

Good Luck and Happy shooting

Colin
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Unread postAuthor: wblteen » Fri Mar 30, 2007 12:31 pm

I cut off just under an inch. I used a hose clamp and bar clamps and the cutting and "tedious" sleeving took only 15 minutes. I must say a hose clamp keeps the pipe almost exactly circular, this is a big help.
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Last edited by wblteen on Sat Mar 31, 2007 2:39 pm, edited 1 time in total.

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Unread postAuthor: aturner » Fri Mar 30, 2007 2:11 pm

wblteen- that is a nice sleeving job. That very nice fit makes me want to give it another try. Glad to hear the hose clamp idea works in practice. I think the idea had been tossed around before, but I don't know if anyone actually tried it until you did.

Funny how folks that have actually tried this approach don't seem to think it's too tedious. We mostly seem to hear it from lazy asses who spend too much time whining at the computer. :P
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Unread postAuthor: noname » Fri Mar 30, 2007 6:11 pm

I was dumb enough to try it without a table saw. I drilled 1/2" hole all over in a line, then cut them out, then drilled again, and finally gave up after over an hour. It came out as too big to fit in the other pipe, and yet was too small for a golf ball to fit.
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