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interference sleeving a 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: jeepkahn » Tue Sep 22, 2009 4:51 am

AAAaaaaargh!!! Ok, we did a full inner and outer bath on the copper, warmed the steel slightly, and we got it sleeved 9" :(

I'm not sure if it's because of irregularities in the 2 pieces of pipe, Too much interference, not working fast enough or what, but it went on 9" and came to a sudden and abrupt stop...

So, now I'm gonna resort to brute mechanical force, I just ordered a 10' stick of 1" allthread rod(which will be here next tuesday), run it through the semi-assembled pipes with nuts and washers on both ends(weld the nut to one end) and I'm gonna put a 3/4" drive impact wrench on it and see if we can't just muscle it together.

I will grease the threaded rod thoroughly to remove as much friction there as I can, and If my calculations are accurate, 500ft/lbs of torque on the wrench should be several tons of compressive force...

If it doesn't work, I'm starting from scratch with new copper and a slightly larger id steel(if I had known how far off NOMINAL specs were going to be, I would've used the 1.135" id pipe to begin with) slather the copper in green loctite and be done with it...`
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My Cannons can be found by clicking the following link.
http://www.spudfiles.com/forums/viewtop ... tml#256896

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