20" Horizontal Offset Build

Horizontal smokers with a side firebox and tuning plates.
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TX_3Gun
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20" Horizontal Offset Build

Post by TX_3Gun » April 5th, 2017, 12:25 pm

I've been referencing several of the builds on the forum for inspiration and ideas. Thought I would share the progress on my build for others in the same boat. With some assistance from a neighbor, we're tag teaming the build. Both of us are looking forward to some tasty BBQ soon!

Specs:
CC - 42 x 20 x .250
FB - 24 x 20 x .375
Stack - 4" pipe

The angle iron legs are temporary. The plan is to mount the smoker to a trailer when the majority of the fabrication is complete.

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Donor trailer for project. I was initially going to use the propane tank shown but it ended up being easier to use the 20" pipe. Hope I don't regret going with the smaller material!

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Re: 20" Horizontal Offset Build

Post by Squiggle » April 5th, 2017, 4:11 pm

:LG: nice work dude! :beer:


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Re: 20" Horizontal Offset Build

Post by Big T » April 5th, 2017, 5:03 pm

:LG: :LG:


Measure Twice.....Cut Three Times.

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Re: 20" Horizontal Offset Build

Post by Squiggle » April 5th, 2017, 6:24 pm

TX_3Gun wrote:Hope I don't regret going with the smaller material!
You won't regret it, just means you'll have to build another smoker!, win win! :beer: :rulz: :kewl:


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Re: 20" Horizontal Offset Build

Post by Rodcrafter » April 5th, 2017, 8:40 pm

Welcome to the crew! You got a great rig going there. I say put this smoker on one side of the trailer then later if you're so inclined put the other one on the other side.


Making memories!


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Re: 20" Horizontal Offset Build

Post by TX_3Gun » April 5th, 2017, 9:51 pm

Stack and grates are in.

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I think I'm going to cover the top half of the throat opening and make the lower portion adjustable. It's definitely too large as it sits today.



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Re: 20" Horizontal Offset Build

Post by TX_3Gun » April 6th, 2017, 10:32 pm

Covered the upper half of the throat and made the lower adjustable. Not sure how it will work out but it seemed like a good idea. Any thoughts?

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Re: 20" Horizontal Offset Build

Post by Big T » April 6th, 2017, 10:46 pm

I think it was a good idea to close the top of the throat because it looked like it was too large. I remember that Gizmo built a damper like this and he said he had to run it wide open because of the way it worked. He said if he done another one that he would make it a slide damper so he could change the size of the throat. If nothing else you can close it off while you are loading/unloading the CC and you won't get a face full of smoke.


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Pete Mazz
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Re: 20" Horizontal Offset Build

Post by Pete Mazz » April 7th, 2017, 3:11 am

Are you using tuning plates?


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Re: 20" Horizontal Offset Build

Post by TX_3Gun » April 7th, 2017, 8:16 am

Big T wrote:I think it was a good idea to close the top of the throat because it looked like it was too large. I remember that Gizmo built a damper like this and he said he had to run it wide open because of the way it worked. He said if he done another one that he would make it a slide damper so he could change the size of the throat. If nothing else you can close it off while you are loading/unloading the CC and you won't get a face full of smoke.
This makes sense. I didn't think about closing it off when unloading/loading. Good idea.



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Re: 20" Horizontal Offset Build

Post by TX_3Gun » April 7th, 2017, 8:19 am

Pete Mazz wrote:Are you using tuning plates?
I wasn't planning on it. I kind of like the idea of "hot spots" that I can use to my advantage when cooking. I thought the biscuit trick was a great way to find them. The tuning plates can be added later easily enough if that changes.



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Re: 20" Horizontal Offset Build

Post by TX_3Gun » April 7th, 2017, 9:59 am

From the Pit Caclulator
Cook Chamber Size 19.5 in. 42 in. 12,543.20 in³
Firebox Size 19.25 in. 24 in. 6,984.94 in³ Recomended Size 4,181.07 in³ 167.06%
Chimney Size 4 in. 349.246928309 in³ 27.806284101 in.
Air Intake 5 in. 4 in. 20.95 in² 1.05
Throat Size 55.8795085294 in.


Cylinder Throat Opening Calculations
Top width of cut-out.: 17
Bottom width of cut-out: 0
Height of cut-out: 4.732
Calculated Area: 56.822

This basically confirmed my suspicions that the throat opening was way too big. The adjustable damper will likely need to be all the way open to meet the calculated area requirements. I want to double check the measurements this evening but I'm thinking my cutout is a little larger than recommended. I'll add a dam to the bottom to get it in line with the calculator. I do like the idea of closing it when/if needed, so it will probably stay on there.



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Re: 20" Horizontal Offset Build

Post by Squiggle » April 7th, 2017, 4:16 pm

It will work like a shadow plate too, nice wine dude. :kewl:


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Re: 20" Horizontal Offset Build

Post by Rodcrafter » April 7th, 2017, 8:41 pm

Yes what he said


Making memories!


Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........

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Re: 20" Horizontal Offset Build

Post by TX_3Gun » April 8th, 2017, 6:42 am

Added door stops, grease dam, and drain valve.

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Still have more work to do like adding an upper rack, outside shelves, mount it to the trailer, paint, etc. Couldn't stand waiting so I did a little test run. It seems to be a champ! Very easy to control up or down and it holds nicely.

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Re: 20" Horizontal Offset Build

Post by mp4 » April 8th, 2017, 7:12 am

very nice!



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Re: 20" Horizontal Offset Build

Post by Rodcrafter » April 8th, 2017, 7:17 am

Sweet! Are you going to mount it on that big trailer? If so you will be building lots more to put on it. Nice trailer too


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Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........

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Re: 20" Horizontal Offset Build

Post by Big T » April 8th, 2017, 11:13 am

:LG:


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Re: 20" Horizontal Offset Build

Post by Squiggle » April 8th, 2017, 3:11 pm

Lookin good dude, fantastic work! :kewl:


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Re: 20" Horizontal Offset Build

Post by TX_3Gun » April 28th, 2017, 9:04 am

Mounted to trailer.

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More add-ons for the trailer:
- 2 Burner griddle / cooktop
- Wood storage
- Weatherproof storage box
- Rewire / new lights
- Replace jack



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Re: 20" Horizontal Offset Build

Post by Rodcrafter » April 28th, 2017, 11:40 am

:LG: :beer:


Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........

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Re: 20" Horizontal Offset Build

Post by Big T » April 28th, 2017, 4:39 pm

:yth: :kewl:


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Re: 20" Horizontal Offset Build

Post by Squiggle » April 28th, 2017, 4:42 pm

Awesome work dude! :kewl:


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Re: 20" Horizontal Offset Build

Post by ajfoxy » April 28th, 2017, 5:21 pm

Nice work. Looks like an "off road" smoker with those large wheels.


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Re: 20" Horizontal Offset Build

Post by temurf » May 3rd, 2017, 9:53 pm

That's a good loohing rig.


Yer gonna like what we've been smokin'.

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