prtb

Thank you. You just designed my brazing hearth. My plan wasn't really thought out yet, i got distracted by burners. I was thinking insulating fire bricks base + corner with 2 or 3 additional loose firebrick to place around as required. That table in the book is actually what prompted me to ask the question. You have a "2-inch (probably)" burner in the table. So i figured behind the "probably" bit, there was some "magic mathematical air jet induction theory with formula"... or something. Sounds like there are too many contributing design factors to give an generic answer. Anyway, I'm satisfied. Thank you for for responding. I did come up with the following table by digging through you various "Mikey Burner" designs ( a few assumptions here). There's always patterns to be found in these things. If the patterns scale and are even useful is different matter. Thanks, Peter

Location updated. I'll likely be a flash "Flash in the pan" here. I do think you guys are doing great work here. I'm looking at building a brazing hearth (wanted for another project) and i was researching refractory materials. I somehow stumbled across Mikey98118 posts on potential makeup of ITC-100. I said to myself "That guy knows his stuff". So started stalking his posts, found a book and the "Mikey Burner". So here I am... Researching burners.. down a researching rabbit hole. Peter.

Mikey, For your "Mikey Burner" Jet burner designs, can you explain how do you calculate the ideal gas jet inner diameter for a given mixing tube inner diameter? Thought these forums, several times you quote an ideal jet orifice diameter for a particular burner diameter/design (usually the mixing tube inner diameter). The 1/4" burner design has 0.370” inner diameter for mixing tube, and a recommended gas jet inner diameter of 0.016” . The 3/8" burner design has 0.495” inner diameter (which happens to be closer to 1/2") for mixing tube, and a recommended gas jet inner diameter of 0.019”. You have said for 1/2" burner ideal get jet inner diameter of 0.028” (which does not exist as a mig tip). is this 1/2" #40 pipe book design? e.g. nominal #40 1/2" pipe (so google says inner diameter of 0.622"? ) I'm suspecting 1:28 ideal ratio of propane:air is important in the calculation, but i can't work it out or find a reference. I think i'm getting nominal pipe and actual ID sizes all mixed up. Thanks, Peter