Welcome aboard!! It looks like you're off to a great start! So is it going to be a traditional offset or an RF ? You should start you a build thread so that it's easier for everyone to keep up with.
Thanks. I have more steel arriving Friday to start installing the reverse flow baffle. I'm going to make it adjustable ao I can regulate different temperatures. I'm thinking 12"-16" wide 1/4 plates that can be moved and butted together. How has everyone else done this?
On a true RF the baffle plate is a solid plate that is welded in, it has a gap at the end farthest from the fire box. You can adjust the BP gap from the same size as the throat, down to 75% of the throat to change the ''tune'' of the pit. A traditional offset uses tuning plates like you are referring to so that you can regulate different temperature zones. I'm not sure how a gap in the BP other than the normal end gap would affect the performance, I can't say it wouldn't work but I can't say it will either. I have seen a couple of guys build a hybrid smoker that has a stack on both ends of the pit that can be blocked off and they have plates like you are wanting to use. They can push them together and run it as a RF or spread them out and run it as a traditional offset.
Another thing to consider is, when the baffle plate has gaps like a tuning plate you need a grease dam at the FB throat. On my backyard rig I made an adjustable BP for the purpose of closing the opening into the CC like BigT said. I used 6” or 9”wide plates with 4” flat bar welded to one side of each plate so they would overlap. This afforded me about 6” of adjustment to the end gap.
I too wouldn’t make gaps between the plates without a stack on both ends to direct the draft.
Sent from my iPhone using Tapatalk
Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........
Thanks for the input guys. Based on your posts, and doing some research on my own, I'm going to make a hybrid that I can run as a true RF or open tuning plate and run more as an traditional offset. I like this because some times I smoke all ribs. But sometimes I'm smoking my ribs and finishing a pork butt. This would allow me to run part of the smoker at 325 while keeping part of the smoker at 225. Getting the plates to fit right will be the key. I will also find a way I can lock the plates in place. So when I move the trailer the plates stay. Do I need to worry about a 9" plate warping from the heat cycling?
Just my 2 cents, but ill bet you end up with close to a 100 degree temp difference from side to side no matter what you do. A pit that long is going to have trouble keeping even temps left to right.
I have been working on this project but have not shared in a while. Wanted to update everyone on my progress.
Attachments
Flanges added to doors. I used 11ga metal and spot welded them on before finish welding.
Fabricated hinges. I put the pipe on 1/4" metal to allow space for hinge stops to spin, and allow 1/2" rod to clear door flanges.
Doors on. I talked welded spacers to opening to keep door centered. The doors and tank warped, I will show how I fixed that later after all welding was done.
When I mounted my doors they did not fit (match radius of tank) after some measurements I realized the tank tried to unroll and flattened the small ribs between the doors. To fix this I cut all my middle shelf supports the dimensions on the side of the tank that still has the end bell. I used a portapower and pulled the tank back. I had a gap from 1/2 to over an inch. I'm attaching a pic to show how I did that. I also used a ratchet strap to hold the shelf (no expanded metal on it yet) to the support rails with an 11ga spacer. The doors are very close. I will fine tune after all welding is done.
Firebox is built. I have openings on top, a baffle plate with the opposite opening will normally close them off. But I wanted to be able to open to grill and more importantly cook fire oven pizza. The top of firebox is 3/8. The rest of the firebox is 1/4"
Learning generally boils down to "Repetition or the avoidance of pain", some people learn by doing, some by watching and some just have to pee on the electric fence.
Whether you think that you can, or that you can't, you are usually right. Henry Ford
I can start to. I actually went and had BBQ today lol. The next thing I need is 10 spring handles and 8 temperature gauges. Any recommendations for a site I can buy them in bulk? Or at least a good price for a good product.