Hi Big Al. Hope your having a good day.
Out of all the research i have done all I have really found is that regular clay is missing two elements an blue or grey is missing three, so the blue has less iron.
I really thought after you posted that someone would give there 2 cents. I will try to get a sample tomorrow morning so I can make some sample cob.
I did make a test unit in the yard with the normal size fire bricks and it worked great, I am amazed by how it works and for just having the right size feed and right size riser without anything else there was almost no smoke once it got going. I think the gasses were about 7 to 800 in the top of the tube. So I cooked a steak with oak and maple
I want to build the core with the thinner firebricks then cast around that but the casting will also include the barrel platform and also my 6" exhaust will also be cast right into it so it will be a real tight clean system.
My friend works for an insulation company, he is going to give me some sort of crazy light weight and dense 2" foam that can handle upto 2500 deg so I think I can line my floor with that instead of bricks and air channels. That will save a couple hundred pounds. Lots of thoughts.
I really like having a new project.
