First reverse flow build

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SmokingPerformance
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First reverse flow build

Post by SmokingPerformance » January 13th, 2020, 9:17 am

Hi everyone, I'm new to the forum but I've visited the site a few times looking for ideas so I joined your great group! We are in the beginning stages of building a reverse flow smoker using 24" diameter pipe that's 3/8 thick. We are planning a warming cabinet/ vertical smoker above the fire box that is also 24" diameter and 42" tall. The cook chamber will be 72" long with a extra 6" dome at the end. The fire box will be made from the 24" pipe as well and turned horizontal the same direction as the cook chamber. I have a few questions regarding fire box size. Since I want to use the vertical warming cabinet as a smoker at times as well do I need to calculate it into my fire box size? And any thoughts on sliding baffles to direct heat into the vertical cabinet and what size? I was thinking of one directly into it from the fire box and also one from the cook chamber into the side of it as well. I'll have a chimney out of the vertical cabinet with a damper on it. Thanks to you all for your help and I'll post pics of it as I go and of my previous builds!



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towtruck
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Re: First reverse flow build

Post by towtruck » January 13th, 2020, 9:36 am

Welcome!

I cannot help you much with your build but there are others that will be along to help. I have seen many build photos here of just what your looking for. You should be able to figure it all out!

Take a look at the thread titled 400 gallon RF Tank.



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Re: First reverse flow build

Post by McBroom » January 13th, 2020, 10:41 am

Welcome Aboard from Denison,TX. Sounds like a good build.
Have you started mocking it up yet or made a napkin drawing???

Claud




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Re: First reverse flow build

Post by mp4 » January 13th, 2020, 10:50 am

SmokingPerformance wrote:
January 13th, 2020, 9:17 am
I have a few questions regarding fire box size. Since I want to use the vertical warming cabinet as a smoker at times as well do I need to calculate it into my fire box size?
Warming cabinet volumes are not included when calculating the firebox size.

Welcome to the board!



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Re: First reverse flow build

Post by SmokingPerformance » January 13th, 2020, 12:37 pm

So even if I want to use the reverse flow and the vertical as a smoker at the same time I still don't have to include it in fire box size? Thank you for your help!



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Re: First reverse flow build

Post by SmokingPerformance » January 13th, 2020, 12:38 pm

I have not have it mocked up but I do have preliminary drawings and most of my materials and a trailer already.



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Re: First reverse flow build

Post by Big T » January 13th, 2020, 6:54 pm

Mp4 is correct, the WC is ''free'', no need to figure in that volume with your CC. I built a 24'' X 48'' with a WC above the FB and installed baffles between the FB and WC and the CC and WC. I made the opening from the FB to WC 5'' X 5'' with a sliding baffle and I made the opening from the CC to WC the same size as the Throat but after using it for a while I don't think it really needs to be that big. I can match temps in both chambers or run them at different temps if I want to. I'll post a link to my build when I get a chance and I have some more build pictures on my phone that I can post if you need me to, also check out the Mack build thread in the RF section and Frank has a very well documented thread of how he done his set up. I went with a simple sliding baffle on my build.


Measure Twice.....Cut Three Times.

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Re: First reverse flow build

Post by SmokingPerformance » January 13th, 2020, 8:51 pm

Thanks Big T for the info. I'll check out the builds you mentioned. I've been busy here working on modifying my trailer to hold up to the weight of the smoker but I'll post pics of the build along the way. I'll be back at it through the week.



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Re: First reverse flow build

Post by Dirtytires » January 14th, 2020, 12:27 am

I followed BigT’s advice on my build and couldn’t be happier.

I used a 4 inch circle between firebox/warmer and between cook chamber/warmer and slides on both. No real reason other than I already had the plasma cutter set up for 4 inch circles for the chimney holes.



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Re: First reverse flow build

Post by SmokingPerformance » February 2nd, 2020, 9:03 pm

Sorry I've been away for awhile. I had the flu for over a week and have been busy with other projects. I'm working on the trailer right now. But I have a question for the baffle plate height. Where have you all been placing it? Same height as the opening to the C.C.? Or higher? Thanks for your help and I'll post pictures as I go. The notch in the frame is for a side box that we are using that is going to double as a prep table with a butcher block top. It is a L shape and I needed to drop it down below the frame to get the correct height.
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Re: First reverse flow build

Post by Dirtytires » February 3rd, 2020, 11:28 am

My baffle plate is about 2-3 inches above the throat from the firebox. Leave me just enough to fit in a shadow plate.



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Re: First reverse flow build

Post by SmokingPerformance » February 9th, 2020, 1:03 pm

Just posting pictures and updates on the progress. We are about done with the trailer for the smoker. We added in fresh water tank and waste water tank and built the tongue and axle mounts Saturday. Going to attach the side box/ prep table today and I'll post pictures of that later. Hoping to start the smoker build next weekend. Thanks guys for all your help! I really appreciate it! Hope you enjoy the build
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Re: First reverse flow build

Post by SmokingPerformance » February 9th, 2020, 1:05 pm

I'm not sure if my pictures are attaching correctly. I attached several but can only see one. Not sure if any one else can see more than one. If not let me know what I'm doing wrong.



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Re: First reverse flow build

Post by McBroom » February 9th, 2020, 3:08 pm

SmokingPerformance wrote:I'm not sure if my pictures are attaching correctly. I attached several but can only see one. Not sure if any one else can see more than one. If not let me know what I'm doing wrong.
None posted via tapatalk app

Claud McBroom




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Re: First reverse flow build

Post by SmokingPerformance » February 12th, 2020, 1:18 pm

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Re: First reverse flow build

Post by McBroom » February 12th, 2020, 4:44 pm

Now I see your pics. Sweet build dont stop

Claud McBroom




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Re: First reverse flow build

Post by SmokingPerformance » February 13th, 2020, 10:14 am

Thanks, we are starting the smoker this Friday and hope to have it partially built by the end of the weekend. I'll post more pics as we build. Any suggestions or changes you see or think we should change let me know. Thanks



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Re: First reverse flow build

Post by McBroom » February 13th, 2020, 1:42 pm

Sure will. Post bunches of pics. I'm always here monitoring the builds everyone is doing. I'm building a 250 gal RF and looking at the ongoing builds for ideas and improvements for mine.

Claud McBroom




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Re: First reverse flow build

Post by SmokingPerformance » February 16th, 2020, 10:47 am

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We are cutting the doors today. I have a question on hinge placement. Do you place the bolt holes of the hinge on center with the top door seam at the cut or hold the hinge back from center away from the door? I'm using this style hinge.
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Re: First reverse flow build

Post by SmokingPerformance » February 16th, 2020, 10:56 am

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Here are some pics from Friday and Saturday. We cut out 3/8 plate for the FB and the end of the CC at the FB and cut out the opening. Then welded them together last night. For room constraints I was going to place the baffle plate right above the throat opening. That way I can put my first rack about 3 inches above that and then be able to get a second rack 6 inches above that. Does that sound ok or should I place the baffle plate higher? I'm sure ideally it should be higher.
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Re: First reverse flow build

Post by SmokingPerformance » February 16th, 2020, 7:57 pm

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Got one door cut and framed up. Going to work on the second through the week if I get time. Hopefully by the end of next weekend we will have the doors done and the BP set up. We cut out and made our own hinges based on designs we found.
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Re: First reverse flow build

Post by SmokingPerformance » February 16th, 2020, 7:57 pm

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Re: First reverse flow build

Post by McBroom » February 16th, 2020, 9:30 pm

Looking great. I bet it'll cook amazing!!

Claud McBroom




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Re: First reverse flow build

Post by Big T » February 16th, 2020, 10:21 pm

I use bullet hinges and they are mounted to the door flange so that's where I would put the pivot point but either way would probably work fine. As for the BP, many guys have put them at the same height as the throat so it can be done that way. It may end up being a little bit hotter at that end of the pit but it shouldn't be an extreme difference.


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Re: First reverse flow build

Post by SmokingPerformance » February 23rd, 2020, 10:02 pm

We got the sinks framed up on the trailer and working on the water heater mounting. Framed up the second door and welded up the baffle plate and started welding up the drain in the baffle plate. Also cut out the plate for the fire box door.
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