Permsteading.com

I did a test burn with a new burn channel top and chimney front, somewhat different configuration that crowded the barrel even more and made the system size even larger.. The fire was slow to get going and the system never got anywhere near as hot. Barrel top maxed at about 400˚F. On the plus side, the replacement pieces were unaffected.The bottom is still in one piece, but the sides have collapsed.
I suppose I will do some sort of clay surface stabilization experiment next. Don't get the wrong idea if you catch me digging in the kitty litter.

Sounds like you are gaining a lot of knowledge that will be very helpful to you in the future. Testing the draw, seeing how different materials stand up to that intense heat, you are seeing how a RMH works in theory and in practice. Let uS all share in the things that you learn from your experiments. Keep tweaking your design and see what works best.

Yep, these are fascinating threads. It's a really enjoyable read. Thanks, Nutcase.