- Aug 6, 2024
- 18
- 4
Brand new to this whole idea of building a smoker but have decided to jump in and build a small offset smoker using a 30 gallon (new; got from company going out of business) air compressor tank as the cooking chamber.
With encouragement of civilsmoker and JckDanls 07 , I will post here as I design and build the smoker. Any comments, suggestions, critiques welcome.
I have used the calculator from daveomak and have come up with the following:
30 Gallon Cooking Chamber (CC) = 6,930 cubic inches of volume with diameter around 20 inches
Therefore, as a MIMIMUM, I should have
Firebox (FB): 2,308 cubic inches
From what I have read, the connector from the FB to the CC should be as wide as the CC so that means my FB dimension needs to be at least 20" wide by 12" tall by 10" deep
That is too small to get much wood into so I was thinking of making it much larger, like 20" x 20" x 20" = 8,000 cubic inches
Is too large a firebox a problem? (3.5 times minimum)
The connector from the FB to the CC: 27.2 square inches
With a 20" width, this would mean an opening of about 20" wide by 1.36"
If I made it 20" x 3" (or even taller) would that create a problem? (2.2 times minimum)
From what I have read, the opening for the Collector feeding the exhaust stack should be the same size as the FB to CC connector so MIN 27.2 square inches
Exhaust Stack Volume (ESV): 153 cubic inches
I want a good draft so was going to make the stack (foldable) at least 40 inches above the top of the CC, and with a 10 inch CC radius, that means a 50 inch stack total
Stack internal diameter: 2.2 inches
I was going to use 4" pipe for the stack to give lots of draft and put a adjustable baffle plate on top to give full draft on startup and controlled draft on normal operation.
Will this much ESV cause a problem? (4 times minimum when wide open but adjustable)
As you cans see, I am newbie at this but wanted to start from a good base, hence all the sizing questions.
I have some ideas which I will post for thoughts on later but the above is my first checkpoint.
Any feedback welcome.
With encouragement of civilsmoker and JckDanls 07 , I will post here as I design and build the smoker. Any comments, suggestions, critiques welcome.
I have used the calculator from daveomak and have come up with the following:
30 Gallon Cooking Chamber (CC) = 6,930 cubic inches of volume with diameter around 20 inches
Therefore, as a MIMIMUM, I should have
Firebox (FB): 2,308 cubic inches
From what I have read, the connector from the FB to the CC should be as wide as the CC so that means my FB dimension needs to be at least 20" wide by 12" tall by 10" deep
That is too small to get much wood into so I was thinking of making it much larger, like 20" x 20" x 20" = 8,000 cubic inches
Is too large a firebox a problem? (3.5 times minimum)
The connector from the FB to the CC: 27.2 square inches
With a 20" width, this would mean an opening of about 20" wide by 1.36"
If I made it 20" x 3" (or even taller) would that create a problem? (2.2 times minimum)
From what I have read, the opening for the Collector feeding the exhaust stack should be the same size as the FB to CC connector so MIN 27.2 square inches
Exhaust Stack Volume (ESV): 153 cubic inches
I want a good draft so was going to make the stack (foldable) at least 40 inches above the top of the CC, and with a 10 inch CC radius, that means a 50 inch stack total
Stack internal diameter: 2.2 inches
I was going to use 4" pipe for the stack to give lots of draft and put a adjustable baffle plate on top to give full draft on startup and controlled draft on normal operation.
Will this much ESV cause a problem? (4 times minimum when wide open but adjustable)
As you cans see, I am newbie at this but wanted to start from a good base, hence all the sizing questions.
I have some ideas which I will post for thoughts on later but the above is my first checkpoint.
Any feedback welcome.