Christopher Franklin

Glenn,

Thanks for the input.

So, is the 1:2:4 correct? And as your pointing out, it matters how you apply that ratio.

I understand the ratios are nonlinear. So, how is that ratio supposed to be applied and laid out for construction? Inside edges, center line, etc?

On the cross section, yes I am going to maybe build a smaller unit and see how she runs, but your points on surface area to volume are understood, and perhaps I will just stick with the 6 inch size, not sure.

Thanks

Hello All....great forum, been stalking for a few days...

So I am going to embark on my first RMH. Your feedback would be much appreciated.

So, I have a bunch of questions and few odd design criteria’s, but that’s for later............ for now, I wanted some input on the J tube length ratios.

I am doing some drawings before I commit to any mortar. I need some help or guidance with the feed, burn, and heat tunnels sizes collectively known (I think) as the “J” tube. Is the proper ratio 1:2:4?

FYI, I am building my RMH on the smaller side. I’ll explain when my drawings are more prepared. So, onward..

Please see attached, Is that correct? The Heat riser seems tall?

A feed of 8”

Equals a burn tunnel of 16”

And a heat riser of 32”

In my case all measured on the “long” side of the tunnel.

Thanks,
CF