Don - Could you explain what LP and NG stand for?
There doesn't seem to be a problem with the evenness of the flame. Even though it is 3'6" long, the gas is piped directly to the middle of the H and from there goes to the 4 extremities (only a distance of about 2').
Several shorter burners running perpendicular to the gas pipe supply line would heat the deck more evenly. This is the configuration that all the Thai locally made ovens use and the confiiguration that the manufacturer suggested and have experience with. The big difference is that I want to make mine light automatically. Without having a burner running parallel to the face of the oven it becomes complicated to light 4 burners.
I very much like the configuration posted by Scott at reply 79. I prefer the jpg image to the Blogett but availability and ignition pushed me to an H design. It's along the same lines that Marsal explain is superior to there competitors U shaped design.
As it is, I'm not satisfied with the burner now. Still looking out for better. I may well try increasing the number of ports as Scott suggested; which not only will help with reliable ignition but will increase the Btus.
Bob. The idea of two gas inlets is a new one to me and worth thinking about. Thanks.
Sorry to be such a wet blanket. I await further test then with greater pressure.
I read this several times and thought no problem with the wet blanket bit but waiting for further failed test with pleasure is a bit sadistic! Eventually I realised I was misreading 'pressure' as 'pleasure'.