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Retread 08-15-2008 09:20 AM

Quote:

Originally Posted by StayDown (Post 712391)
Being a machinist, ....(snip)..... :mrgreen:

So what do you think? would 24 gauge work?

StayDown 08-15-2008 09:23 AM

Quote:

Originally Posted by Retread (Post 712396)
So what do you think? would 24 gauge work?


That is pretty thin but I don't see why it wouldn't with the way you described doing it.

kitch 08-15-2008 09:37 AM

what about insulating with a welder's blanket?

StayDown 08-15-2008 09:51 AM

Quote:

Originally Posted by kitch (Post 712410)
what about insulating with a welder's blanket?


That would work as well. I suggest giving it a try and then posting some pics and letting us know how it works out for you.

kitch 08-15-2008 09:57 AM

no problem...but I've got to finish the build my USD first ;)

Mark 08-15-2008 09:59 AM

Quote:

Originally Posted by Retread (Post 712396)
So what do you think? would 24 gauge work?

I like the concept but would probably go thicker. As long as you can compress it enough to fit inside.

As for insulation, its value comes from dead air space between the layers. Thermal eddy currents can form within this space; which lowers the insulation value. That why batting is used versus just dead air space. But some batting can absorb moisture (which acts as a conductor).

I think cutting up a couple of water heater jackets to fit would work pretty good.

All this being said, I only use wood, which is free. so I don't really care about efficiency. If I had to buy charcoal, I'd probably reconsider.

StayDown 08-15-2008 10:04 AM

Quote:

Originally Posted by Mark (Post 712425)
I like the concept but would probably go thicker. As long as you can compress it enough to fit inside.

As for insulation, its value comes from dead air space between the layers. Thermal eddy currents can form within this space; which lowers the insulation value. That why batting is used versus just dead air space. But some batting can absorb moisture (which acts as a conductor).

I think cutting up a couple of water heater jackets to fit would work pretty good.

All this being said, I only use wood, which is free. so I don't really care about efficiency. If I had to buy charcoal, I'd probably reconsider.


What is your reason for going thicker on the metal?

Mark 08-15-2008 10:39 AM

Quote:

Originally Posted by StayDown (Post 712428)
What is your reason for going thicker on the metal?

If I'm going to endure the hassel and expense of building a double-wall UDS, I want it to last.

ON THE FARM 08-15-2008 10:57 AM

Why not just section a donor barrel?
Cut off the top and bottom and do the math to see how much of a strip you will need to cut off the side.
Hmmmmm….. I feel a project coming on.

Mark 08-15-2008 11:00 AM

Quote:

Originally Posted by ON THE FARM (Post 712455)
Why not just section a donor barrel?
Cut off the top and bottom and do the math to see how much of a strip you will need to cut off the side.
Hmmmmm….. I feel a project coming on.

DOH!

StayDown 08-15-2008 11:20 AM

Quote:

Originally Posted by Mark (Post 712449)
If I'm going to endure the hassel and expense of building a double-wall UDS, I want it to last.


The hassle?? Building them is half the fun!! :mrgreen:

Mark 08-15-2008 11:35 AM

Quote:

Originally Posted by ON THE FARM (Post 712455)
Why not just section a donor barrel?
Cut off the top and bottom and do the math to see how much of a strip you will need to cut off the side.
Hmmmmm….. I feel a project coming on.


FYI for the math challenged: The math is 3.14 times diameter

kitch 08-15-2008 01:14 PM

has anybody ever did a powder coating on one?

ON THE FARM 08-15-2008 01:37 PM

Should withstand the heat ok.
I looked into it, the cost is what kept me way, the guy wanted $$80 to do it.
I will stick to paint.

Single Fin Smoker 08-15-2008 01:52 PM

Anybody ever have issues with getting your kettle lid to fit?
I just bent the chit out of mine to get it to fit.


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