Dual 240 Gallon Smoker Build Questions

Discussion in 'Reverse Flow' started by jeringate, Aug 7, 2014.

  1. jeringate

    jeringate Newbie

    Hi guys, been lurking around the website for a little bit here gathering as much info as possible but just wanted to gain some of your input as well as ask a few questions.

    I have 2 - 240 gallon oil tanks mounted on a trailer. (as seen in the picture) Planning on doing a reverse flow offset smoker. The tanks measure 23" wide with a 3" gap in between so total 49" wide on the trailer. (This is just a rough install, the tanks are still to be braced together and the rear of the trailer to be stripped to allow for the firebox)

    - What I'm wondering is would it be wise to make 1 firebox for both? (it will be attached to the rear of the trailer) And think about putting a removable baffle/divider in the middle of the fire box? Or would my best bet be to build a separate firebox for each tank?

    - What size would you guys use roughly for a firebox for this set up?

    - Also What thickness of plate metal would you guys recommend to use for the fire box? Would I need the same thickness metal to use as the baffle plate that goes across the bottom of the smoke tank?

    Please feel free to critique this build so far and help me build it to its best potential as I've never built one of these before!

    Thanks in Advance!!!!!!!
  2. dandl93

    dandl93 Smoking Fanatic

    What a fun looking build.Do not take my advice there are great builders on here that can help you with the correct specs.Ideas I do have if it was mine.I would build seperate FBs easier to control for different meats ,temps and wood options.

    Have fun 

  3. cisweld

    cisweld Fire Starter

    My thoughts on this... The firebox for just one of the CC is already going to be pretty big. I don't really see a way to control the heat and smoke from one FB into each of the CC and be stable. My thoughts would be two separate FB or one that has a permanent divider in order to get proper heat and smoke distribution.

    .25 thick plate is what you will want for your FB.

    Good Luck...
  4. lendecatural

    lendecatural Smoking Fanatic

    Check out this build thread, his tank is very close to the shape of yours. With them mounted that close together, you may have an issue with the width of the firebox since you will need a lot of volume for that sized tank.


    The feldon's calculations for your build are here for one tank. You will need to multiply the required cook chamber to firebox opening by 1.5 to make sure it flows well.

  5. jeringate

    jeringate Newbie

    Thanks Len,

    I didn't know about multiplying the FB/CC opening. I Checked out that thread there's a lot of good info in there! So basically build the smoker to those specs you posted. Then multiply the FB/CC by 1.5 and do the same for the opposite end of the RF Plate? And then I can make the firebox whatever size I want? Is my understanding right?

    Thanks for all the input so far guys! This is a first for me, welding too!

    Keep the info and knowledge flowing :)
  6. lendecatural

    lendecatural Smoking Fanatic

    Yes, I think you have it! Here is the post about Feldon's calculator and why you need to do the 1.5 increase: http://www.smokingmeatforums.com/t/161795/is-feldons-calculator-really-flawed

    Welding tips....  Attach ground and weld on clean shiny metal, trust me, it matters, grind or sand off any rust and paint before you start. Practice on some scrap in different orientations on metal of similar thickness to get machine setup. If you burn a hole through something, speed up travel or turn the machine down, if you don't get a good puddle, turn the machine amperage up and adjust wire speed if the metal "stacks up",  there are several good Youtube videos on mig welding that will get you started. Well prepared metal welds much easier, the key is to get a puddle started and move it where you want by leading the edge of the puddle, you will get it when you see it so practice a bit. Wear protective clothes...welding can give you a mean sunburn and when you smell your socks burning, it's too late. Don't ask me how I know!..[​IMG]  
  7. jeringate

    jeringate Newbie

    Well boys, its been a couple weeks!

    We managed to find a member on here who was willing to help us out!

    Here are the progress pictures we've received. She's really starting to come along! The guy is awesome!

  8. jeringate

    jeringate Newbie

    Here are a couple teaser pictures of her finished, I will get some better ones this week. She's been running for the last 3 days straight!

  9. cisweld

    cisweld Fire Starter

    Nice build you got there... Lets see some meat that comes off that bad boy....  :)
  10. jckdanls 07

    jckdanls 07 Master of the Pit Group Lead OTBS Member

    pretty cool build... does the member that helped you not want to be mentioned and thanked in public for helping ???

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