Mjølner Rankenberg

Marco Banks wrote:
But if it were professionally made and fired, like a kamado grill/Big Green Egg, it would be very stable and able to withstand the tremendous temperature extremes.  I'm waiting for the day when someone manufactures these professionally out of clay (again, glazed and fired like a Big Green Egg), with a tight gasket at the bottom that seals perfectly.

But if you glaze it, won't the glaze just run on successive firings?

I was thinking maybe one could build up a rocket mass heater and double bell system in papier mache (as the mold) and clay. Then burn away the Papier mache?

Hi. Did you ever build anything?

And what about the mortar?

paul wheaton wrote:Old school bricks made from clay will do quite well.

I don't understand how normal bricks are able to withstand the heat. Aren't refractory bricks necessary? What temperatures are reached inside the bell? I'd love to build this in my tinyhouse.

Kirk Mobert wrote:The mortar is clay/sand, again using locally sourced clay soil for the clay and locally sourced sand too. Cement based mixes can't handle the heat and should NEVER be used in stoves.
The plywood form is for making the arches. The bricks are laid over the form and then it's taken down and moved for the next row.