I got the hole for the firebox cut and the plate steel welded to the firebox for the firebox door.
(2) 500 gal propane tank smoker build. Franklin style.
- Thread starter rstroup10
- Start date
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I did use a calculator and the stack sizes are just a little bigger than 5% of the firebox volume. I'm not so sure about the the part that is above the cook chamber being the only part that matters. My thinking is as long as the the stack isn't below the firebox the smoke and heat will still draft. If I need to add to the stacks I can I have extra material.
The numbers are based on whats above the cook chamber. There is nothing exact, everyone's got their opinions on whats best and what looks asectically best.
As long as you are in the 5-7% of volume range it should be fine.
Here's Dave o's numbers
Exhaust Calculation..
ESV in cubic inches_____________________________ ... = Stack Length in inches (36" +/-)
0.7854 X Stack Diameter X Stack Diameter
Adjust the diameter of the stack, until the proper length is achieved... be sure to measure the actual internal diameter of the pipe used..
this is for round stacks only..
.... ..
As long as you are in the 5-7% of volume range it should be fine.
Here's Dave o's numbers
Exhaust Calculation..
ESV in cubic inches_____________________________ ... = Stack Length in inches (36" +/-)
0.7854 X Stack Diameter X Stack Diameter
Adjust the diameter of the stack, until the proper length is achieved... be sure to measure the actual internal diameter of the pipe used..
this is for round stacks only..
.... ..
I have made some progress on the smoker. The firebox is connected to the cook chamber but not fully welded. I have built the frame for the racks but I haven't attached the expanded metal yet. I have been trying to work on fixing a sprung door and that has been taking a lot of my time.
I don't think that door is going to pay attention to the little harbor freight clamps and a tie down.
Find yourself a big chain and bottle jack or a 20 lb sledgehammer and large blocks of wood. Sometimes your need to roll your sleeves up and get serious with it.
Find yourself a big chain and bottle jack or a 20 lb sledgehammer and large blocks of wood. Sometimes your need to roll your sleeves up and get serious with it.
I used the clamps to hold the door while I welded the straps on the doors. I was hoping the heat from welding would bring the door back to its shape. That didn't work. I'll be using chains next.
sxfxz
Smoke Blower
- Oct 16, 2016
- 138
- 78
Great idea using the rebar! I spent FOREVER fitting my two together so I wouldn't have a huge gap to fill. lol
http://s10.photobucket.com/user/SxFxZ/media/F4A9BC5E-A7E8-43C9-9329-F410190D2391.jpg.html
http://s10.photobucket.com/user/SxFxZ/media/F4A9BC5E-A7E8-43C9-9329-F410190D2391.jpg.html
Thanks I knew I didn't want to have to fill the gap I had. I saw the rebar and thought man that would work to feel the gap and look unique.
I was able to start a fire in the firebox over the holiday break. I still have to weld the firebox door on and
ahumadora
I will be extending the stacks the smoker seemed to draft better and there will be less smoke in the eyes. You can see my quick fix to see what the difference between stack height is. I didn't do a temp test on this burn mainly because I was wanting to burn out the firebox since it hadn't been done yet.
So the punch list for a finished smoker is now
-extend the stacks
-install thermometers
-install firebox door
-wire wheel/sandblast
-paint
ahumadora
I will be extending the stacks the smoker seemed to draft better and there will be less smoke in the eyes. You can see my quick fix to see what the difference between stack height is. I didn't do a temp test on this burn mainly because I was wanting to burn out the firebox since it hadn't been done yet. So the punch list for a finished smoker is now
-extend the stacks
-install thermometers
-install firebox door
-wire wheel/sandblast
-paint
sonofasmoker
Smoke Blower
It is what I had. They are 6" Square tube from a light pole. I originally made the stacks that short because the volume is what was recommended from the feldon calculator. If that makes sense. I am going for the Franklin method plus the longer stacks do look nicer haha.
Yes I do. I have a pretty big shed that I am going to build the trailer in but I didn't have any lights in the shed when I started the smoker. Plus with the cool weather we have been having I'm glad I was outside in the sun. My neighbors probably think I'm crazy but once they try the BBQ it will all make sense.
I did my 500 gallon tank build outside also. The one I built looks similar to yours.
I can't wait to see the pictures when you get it fired up. I am very happy with the way it works.
sxfxz
Smoke Blower
- Oct 16, 2016
- 138
- 78
My smoker is no where close to those calculators...and it cooks like a dream. lol I would say about 15-20 degrees from front to back. It looks like on Franklin's cookers the stacks are 10" by about 6 feet. Live near Houston? I have a bunch left over. lol
Franklin's 500's:
http://s10.photobucket.com/user/SxFxZ/media/573147E9-8BC2-4703-85C5-215A25A2C2F7.jpg.html
Mine (10"x8' stack)
http://s10.photobucket.com/user/SxFxZ/media/3D85B57C-9510-409D-B0AE-486A6169B4DD.jpg.html
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