Hello fellow pyromaniacs and tinkerers.
My first real success at getting something to burn well and mostly smoke free. Rather heavy as I used gravel for filler around the burn chamber.
Then a more compact and lighter one, with perlite and clay. Along the way, learned that a four inch burn chamber works much better than a three inch.
Then made a better more permanent one for outdoor cooking.
And to finish it off . . .
Will post my home rocket heater(no mass) another time.