Reverse offset smoker questions

[crankyster]

I have done lots of looking and reading on here for months, Im in the process of building a smoker and have decided to change up my initial plan a bit, I have used the calculator to figure all the size holes and so on, I have figured I have 12396 cubic in CC, well doing all the other math on the calculator I have come up with all the number I need Im just having a hard time figuring everything out. For example it says my FB to CC opening needs to be 49 square in, how do I figure the size of the hole its going to be shaped like a half circle ( CC is a 24in pipe and FB is going to be square) Any advice would be great.

 

[pete mazz]

Use one of my throat calcs.

http://planetcalc.com/5155/

 

[radioguy]

They've stepped their game at that website. All sorts of calculators for smokers. Tagged SmokerBuilder.

Thanks Pete

 

[pete mazz]

 

[crankyster]

Man that's good stuff I'm on my way now thanks a bunch

 

[big z 765]

The easiest way IMO is double the divide by pi and that give you the diameter of the half circle