Alan Mikoliet : I Agree with R. Scott, one picture is worth a thousand words. Think of it this way there is always going to be a continuous flow of hot Exhaust gases The hottest
gasses will always work to dis place cooler gases, w there will be some mixing and turbulence, turbulence causes friction which produces heat, as long as we have a continuous
re-supply of Hot Exhaust Gas, and our pipes are sized and placed right we will have some stratification of gas w/in the barrel, with cooler ases being displaced by warmer and
lighter gases and falling, it is the push of fresh hot exhaust gas that forces your cooler gas at the outlet to leave your bell !
Mike Kelly's sketches for the Pocket Rocket thread around October 3rd - 8th show an insulated tube going to the bottom of the barrel. which as you want only your coolest gases
to flow to the next barrel
should be carefully planned for !
I also think that you have gotten too far away from the creation of the Heat Engine Effect of hot gasses cooling as they flow down the sides of the barrel, This is what promotes
the Heat Riser to such an efficient Chimney giving us the air flow needed to create such efficiently burning hot fires, with even todays half bricks, to line our RMHs Burn
Tunnel/Combustion Chamber, we do not need the super refractory insulations for excellent working temperature at our flame front. The super insulation is there to more rapidly
re-radiate the heat and cause our
RMH to reach these Temps 3 Xs faster !
First we want a fast hot burn-Fast ! Then we want a way to dissipate the heat , at best you will be recreating a Russian Masonry Stove that usually costs 10,000s abet cheaper ,
and will pay for that, if you are not careful with a reduction in your clean burn ! For the craft ! Big Al !