Odyknuck wrote: ↑Wed May 03, 2023 9:16 pm
Bill it's not a matter of concern, its the convenance of a readymade part. These are just castings with an 1/8" NPT inlet and a 3/4" NPT outlet. The orifice is whatever you want it to be. You could simply make one as shown in the diagram or buy a pair of these and drill them to whatever you like.
They come with a .035 diameter orifice hole. https://www.amazon.com/gp/product/B08R1 ... FLXJ&psc=1
Not familiar with the DLS burners. Locoparts burners use rosebuds and are on the tall side not to mention expensive. The advantage of the Locoparts burner is it does not require a mixing chamber like we are discussing.
Thanks all, this has been a very interesting thread so far, lots of useful information on the ever-evolving black art of burners.
A question I have is, could this design be reduced in size, and proportion, for use in smaller scales or smaller fireboxes? A reduction would no doubt involve some experimentation, and I assume there would be a practical limit to how much it could be reduced and still perform in the same way. My guess would be reducing the mixing head would present the most problems and need the most fiddling.
I see no reason why you cannot use it in a smaller scale. The burner can be built in any size. You would need to choose the proper size orifice to fit the application. Mine is only going to be 7" x 9".