Author Topic: differant way to construct a cannon barrel  (Read 1988 times)

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Offline GGaskill

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Re: differant way to construct a cannon barrel
« Reply #30 on: September 18, 2012, 03:15:38 PM »
You only need the 1:1 thickness over the chamber and a couple of inches in front.  The rest can be less thick.  Start with your cartridge case design; the rest will follow from that.
GG
“If you're not a liberal at 20, you have no heart; if you're not a conservative at 40, you have no brain.”
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Offline sterling

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Re: differant way to construct a cannon barrel
« Reply #31 on: September 18, 2012, 03:53:01 PM »
so im going to use my old corps breech idea to attach the inner barrel.

here is some pic







so would welding the barrel  to the breech be ok? or should i some how mill it to thread in?

the breech is 2" thick and is welded to a 8"diam barrel. so when firing this you guys are correct..not a real bang.everything was muffled.liking the idea of a inner barrel to send the sound right up the outer barrel.. This is why im here to ask questions to you who are the experts.I really am thankful.

Offline jamesfrom180

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Re: differant way to construct a cannon barrel
« Reply #32 on: September 19, 2012, 03:08:51 PM »
One of your drawings showed a flared end to the inner barrel, I would instead use a set of bushings this will help keep in in line with the barrel.  Really looking good. 
AMMA Bosslopper 1988

Offline sterling

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Re: differant way to construct a cannon barrel
« Reply #33 on: September 19, 2012, 04:43:43 PM »
Thanks..will look into that bushing idea soon as i get the breech built and the inner barrel.. will keep everyone posted.


thanks again

Offline sterling

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Re: differant way to construct a cannon barrel
« Reply #34 on: September 22, 2012, 12:38:22 PM »
quick question.. after i got my breech made how should i attach the barrel to the breech. should i have it thread in or should i have it welded.. i was thinking of threading it in then welded but want to have the right strenth and safty is number one.

Offline Cat Whisperer

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Re: differant way to construct a cannon barrel
« Reply #35 on: September 22, 2012, 01:02:39 PM »
cutting threads reduces the strength by about 50%

Welding should be done away from stress points, may require pre-heat or other precautions (have it done by a certified welder).

Shrink fit and welded is good.
Tim K                 www.GBOCANNONS.COM
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Offline sterling

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Re: differant way to construct a cannon barrel
« Reply #36 on: September 22, 2012, 03:12:51 PM »
have it done by a certified welder....

i wont be cutting corners so i will be getting that part done for sure by a certified welder..

thanks for all your help.