- Apr 26, 2020
- 3
- 0
Hey guys,
my first post here... greetings from Germany,
just registered because I couldn´t exactly figure one main thing out in
daveomak
great tutorial for building a RF smoker.
First off, you guys did amazing work with that guide... Has really helped me so far. This is where I encountered a problem:
I´m building a reverse flow smoker with a round CC and a round FB. However, the CC and the FB have different diameters.
I couldn´t figure out how to calculate the Football opening between FB and CC.
These are my dimensions:
CC inner diameter: 19.52 inches
CC length: 39.37 inches
FB inner diameter: 15.59 inches
FB length: 23.62 inches
In an update to his post, Dave said something about different diameters:
"EDIT..2/13/17... A situation recently arose where the round FB was of different diameter than the CC.... In that event, it is imperative to use the radius of the CC to calculate the initial CC/FB opening.. THEN use the radius of the FB to calculate the FB/CC opening for the football dimensions... reason .. the football will NOT fit into the FB because of the larger diameter of the CC..."
This is the part I don´t understand.
Can anyone help me with that?
Thank you guys!
PS: I also attached a picture of the current state of our build:
my first post here... greetings from Germany,
just registered because I couldn´t exactly figure one main thing out in

First off, you guys did amazing work with that guide... Has really helped me so far. This is where I encountered a problem:
I´m building a reverse flow smoker with a round CC and a round FB. However, the CC and the FB have different diameters.
I couldn´t figure out how to calculate the Football opening between FB and CC.
These are my dimensions:
CC inner diameter: 19.52 inches
CC length: 39.37 inches
FB inner diameter: 15.59 inches
FB length: 23.62 inches
In an update to his post, Dave said something about different diameters:
"EDIT..2/13/17... A situation recently arose where the round FB was of different diameter than the CC.... In that event, it is imperative to use the radius of the CC to calculate the initial CC/FB opening.. THEN use the radius of the FB to calculate the FB/CC opening for the football dimensions... reason .. the football will NOT fit into the FB because of the larger diameter of the CC..."
This is the part I don´t understand.
Can anyone help me with that?
Thank you guys!
PS: I also attached a picture of the current state of our build: