Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

That would be Orange Glow not bright Yellow or White hot. If you notice in Keith's video, when he says it is just right, the ceramic is glowing with a dull Orange Glow perhaps fringed with a bit of pink, and he doesn't have a large blue flame rising above the surface of the burner, but rather small blue triangles of flame at each hole.

Alright.

I’ll give it a whirl.  I wrote to Stuart about the center flue. I’ll update you with what they say.