Julia Winter wrote:35 minutes is super fast!
I think your pizza would be tastier if you get the temperature up closer to 500 degrees, but the speed of your fire is impressive.
I do like it when I hit 400 deg it does have a different taste with the veggies. This is not as insulated as it should be so I do loose a good deal of heat.
The fuel that I use Bolivian sun flower stalks has to be continually fed to keep the flame at peak. But the real advantage of the stalks is they are all straight 10 - 15 foot long stalks so no processing of the stalks for the fire.
I was about to build a cob oven, but I am so glad that Permies did the kick starter for the design of this. Mine is not exactly to spec, but would not take much to fully insulate this.
When I was done with the pizza I had all kinds of coals left. I turned that into biochar. Multiple functions from a rocket oven is superb thing.