Finally getting a chance to work on this again, haven't been out of town where my project has been sitting since Christmas.
- I'm starting with tank upside down to make my cuts for the firebox.
- I'm going to make the firebox opening for 11.9" based on my program that implements DaveOmak's formulas.
- It was mentioned by somebody to increase this to 12.25" to leave room for a baffle. I don't know what this refers to, honestly. I assume this another term for the reverse flow plate.
- I can always open it up further if I have to, so I guess I'll pick the smaller of the two for now.
- I'm still highly unsure of how the reverse flow plate, FB/CC opening / Firebox are all supposed to go together.
- Once I get the opening done, I can double check my numbers, that I can slide a reverse flow plate in and it should be 30.15". I'll go purchase the sheet metal for this, and get it cut to the proper size.
- Slide the plate in, with it being at the top of the FB/CC opening, and weld it in place.
- I guess I'm supposed to cut the end of the plate to match the dome curvature? Or does the interaction of the firebox somehow help seal this?
- I'm not sure how the fit of the plate is going to be compared to the FB/CC opening. But, I assume the firebox will be welded to the end of the reverse flow plate, so that it forms a solid surface
Ribwizzard's post, http://www.smokingmeatforums.com/t/172521/novasbcs-250-gallon-propane-tank-build#post_1275581, still has me confused, unfortunately. He says to slide the plate in before welding in the firebox, makes sense. However, if I have the plate in there, how can I later reach in with a torch, and "cut opening into firebox". By definition, the plate is already there and in the way?
I'm just going to move forward, and get the FB/CC opening cut today, since I have to make some progress, and hope I can muddle through the other aspects, and start understanding how they all go together. I try to find pictures to answer my questions, but haven't quite found the ones that really show me what I'm wondering. Tonight when I lose daylight, I'll do some more searching.