OMOSB - "One More Offset Smoker Build"

[Triple T BBQ]

Greetings Gents,

Been lurking for a while now, soaking up all the great info here on the forum. Decided after cooking on a couple smaller smokers that it just wasn't cutting it. Also a couple friends kept saying you should go try the competition side and see how you do. :crazy:

Got a look at some of the prices on the commercial stuff and then saw some of the outstanding smoker projects on here and said what the heck. I really like the Jambo J5 style smokers but the pricing was a bit more than what I wanted to spend. Even still, I really like the layout and design!!


A very nice example of a Jambo J-5 style smoker.

So with that in mind, I picked up a couple components to get me started.

First up. The tank. Its a 68x24 inch air tank.

The local auction side had one 50 miles away.

Next we picked up an older Energy Mate double walled wood burning stove. I figured this would save us some time on making the firebox.

Lastly I snagged an older heavy duty single axle boat trailer from the load marine dealer. This one was really nice since the price was right and the tongue and axle can both be adjusted back and forth to balance the load.

A couple hours with the grinder and the plasma cutter was all it took to get the trailer down to bare bones so we can test fit the smoker and fire box.

 

[landarc]

Looks like you got a good start on the demo work, interesting thinking going on.

 

[colonel00]

Great looking start :thumb:

 

[speers90]

I will be following along!

 

[cholloway]

All you lack now is finishing up!
I'm looking forward to progress pics.

 

[BBQ PD]

Great start, and very much looking forward to the progress :thumb:.

 

[morgaj1]

Looking forward to this build. Between you and Ryan (Speers90), you have stoked my inner fire to build my own. I have the welders and a plasma cutter, I just can't find a tank.

 

[tish]

You've got such purdy pieces to begin with, you look almost done and haven't even started yet! :thumb:

 

[bluetang]

Great start Mon! Will be o' watchin:-D

 

[gtr]

:thumb:

 

[KingRanch450]

Looking good....I'm really looking forward to seeing your progress!

 

[smokingj]

bookmarked and pulling up a chair to watch this. Anyone got any popcorn?

 

[Sammy_Shuford]

Love a build thread!
Keep the pictures coming!

 

[Randbo]

I will enjoy watching this come together!

 

[Black Dog BBQ]

Subscribed! Now get after it!

 

[Triple T BBQ]

Thanks everyone. Its been a bit of work collecting things so far, but the deals are out there if you wait and are patient. I finished tearing down the trailer last night and checking things out.

* The left wheel bearings are shot as suspected and the tires are dot dated from 1990 which means they are original. Yikes. Already planned on replacing them so no worries there. In fact, I have a set of older aftermarket aluminum jeep rims that have been sitting around the shop for ten plus years that may fit. The brakes on the trailer were originally hydraulic based and totally trashed. I am just going to refit them with new disk brakes from my northern tool dealer. Found them on sale this week for 100 bucks off per side!!

* Pulled the stove into the shop and its going to take min amount of work to modify it. Pics coming shortly. This is a double walled unit with a blower on the bottom of the unit. Since we are going to dropping this down into the trailer I will either need to loose this fan or move it somewhere else. I am thinking of keeping it so I can use it to move warm arm to the warmer I want to build later on. The heat exchanger vent is on the top so that will get closed off and moved to the right side where the warmer will go eventually. I will just close it off with a plate for now. The rear has the classic 6 inch opening on the rear of the stove but its mounted about 3 inches too low. I am going to move this up and increase the size of the opening.

Was thinking of just picking up a straight piece of chrome stack from my local truck parts guy for the exhaust on the end of the cooker. Something like this. I figured I would just drop a standard stove damper in the top a couple inches down from the top to control the exhaust flow. Thoughts on this and the length? See my calculations below.

Can I get some feedback on the requirements?
My tank is 24x68 and I come up with 10248 for cubic inches. Since I am going to place the fire box inside the tank a bit I came up with 9646 after subtracting the space that the firebox will occupy in the tank.

The fire box comes up as 9504 cubic inches. So I think I am pretty close to the 1/3 rule as far as that goes.

My exhaust calculation comes in at 475 cubic inches and with 5 inch pipe the calculator says 24 inches in length. i figured I would make it 36-48 inches long just to get it up and away from us while running the smoker. Besides whats a little more draw when you need it right? Any concerns here?

The opening from the firebox to the cook chamber needs 76 cubic inches. I was just going to use a 5x16 opening across the top and rear of the box which would put me well over the 76ci I needed.

What are folks recommendations here for some the openings? Better to go larger, smaller or just follow the calculator to the decimal point? :shocked:

 

[Triple T BBQ]

Looking forward to this build. Between you and Ryan (Speers90), you have stoked my inner fire to build my own. I have the welders and a plasma cutter, I just can't find a tank.

I had better luck looking at local auction and steel scraping operations than i did with the propane tank dealers. Even though I know about how to cut up a propane tank, for the size i was looking for, this made perfect sense and again the price was right. Also if you have a trucking salvage yard in your area the air tanks on the 18 wheelers, buses, and other heavy equipment can be picked up pretty cheap too. Found a number of 40-80 gallon units that way.

 

[RevZiLLa]

Subscribed!

 

[Cloudsmoker]

This may be the most entertaining project in some time. Thanks for posting.

 

[speers90]

What are folks recommendations here for some the openings? Better to go larger, smaller or just follow the calculator to the decimal point? :shocked:

To me it looks like your numbers will work fine. I didn't do any calculations for mine though so you might want to take my word with a grain of salt.