I just dropped the price of
the permaculture playing cards
for a wee bit.

 

 

uses include:
- infecting brains with permaculture
- convincing folks that you are not crazy
- gift giving obligations
- stocking stuffer
- gambling distraction
- an hour or two of reading
- find the needle
- find the 26 hidden names

clickity-click-click

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question about RSMH  RSS feed

 
Larry Beaudry
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Hi guys...love your stuff!! I have a question...I have built a rmh but it doesn't burn correctly...I made the burn tube frrom 6"
pipe inside 8" and insulated with concrete and perlite. The burn chamber I made with a T pipe...and I connected the two using an elbow.
I have a stainless steel keg for the barrel...then I have the exhaust inside chimney blocks filled with 5" and bigger stones. The pipe is flat and runs for 15'
more or less. It works "ok" when it first starts but the fire starts to lessen in 15 minutes and then smokes out the fire chamber.
Any suggestions?
Larry
 
Adam Stjohn
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I have a similar question. Having recently completed an RMH, it is experiencing similar problems.

First off, I'll let you know what my question is:

Do RMH's usually require some time to dry-out or 'cure' before they start working really well??

My hypothesis goes like this:

As the soils around my place do not have enough clay content to make good cob, my mass is composed of dirt and gravel (partially encased in a brick exterior, and then partially encased in a wood frame similar to Paul Wheaton's portable RMH). So anyway, the mass is composed of dirt and gravel...

To compact the mass, I added probably FIFTEEN BUCKETS of water to it. (It soaked it right up.) And then I manually squished and squashed and compacted the fairly wet mass. (This was to get the air out of it, to help the mass act like a dense conductor, rather than an aerated insulator.)

When the RMH is running/burning, the exhaust is obviously heavy with lots of steam and water vapor. The exhaust smells like wet bricks, clay, dirt... wet earth. I know that some of the water (from the mass) is leaking in to the ducts through their seams. Hell, the bricks and mortar around the stove-core aren't even totally dry yet.

SO the stove burns alright. The draft can work okay. But I'm wondering...

Do RMH's usually require some time to dry-out or 'cure' before they start working really well??
 
Adam Stjohn
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Well, I consulted Ianto and Leslie's book. The sections called "Burning Questions" and "Troubleshooting" we're particularly helpful.

More or less, with any new masonry stove, the stove will need some time to dry out. Until the stove drys out, there may be some problems with smoke-back.

I also noticed that I still had many loose fragments of excess mortar in the burn tunnel (from the original construction). So I cleaned that stuff out.

I'll let you know how it goes. Also, Larry, I'll take a closer look at the specifications of your stove, that you mentioned, and consider your situation in more detail. Good luck!

-Adam
 
Larry Beaudry
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Hi again.
Just a couple of additions to help figure out my delema.
The burn tube is about 22" long and, the tube is connected to the fire chamber
by a regular elbow. I was wondering if the turn from the fire chamber to the tube
is not sharp enough...you know.. a quick 90 versus a "slow" 90.
It seems as if the fire isn't large or hot enough to "push" the flame up the tube and,
it is not burning all the particulate matter. It doesn't seem very "rockety".
Possibly from the lack of air movement?
Thanks for your input.
Larry
 
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Permaculture Playing Cards by Paul Wheaton and Alexander Ojeda
https://permies.com/wiki/57503/digital-market/digital-market/Permaculture-Playing-Cards-Paul-Wheaton
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