[Stoves] Fire Stump

[rongretlarson at comcast.net]

Martin (with cc to stoves list +1 ) 

Thanks. 

We saw/heard no discussion your the aluminum foil idea. Please tell us what differences result, if you try that out. My guess is that it makes little difference at first, but progressively more as the flames get near the circumference. But if there was some value in radial secondary air holes (and there may not be), then oone has a good chance to do some secondary air heating (towards the end of the run). 

For anyone with experience with hand-held battery-powered drills. Are there any recognized upper limits for drill diameter and length? 

Ron 

----- Original Message -----
From: "Martin Dr. Boll" <boll.bn at t-online.de> 
To: stoves at lists.bioenergylists.org 
Cc: "Frans Peeters" <peetersfrans at telenet.be> 
Sent: Tuesday, July 19, 2011 1:54:02 PM 
Subject: Re: [Stoves] Fire Stump 




Ron, 



To your question: 

<6. I wish I had seen how difficult it was to drill the central hole of the Rocket design. 

<Is there a power tool on the market like the chain saw <(but for drilling holes)? 



A “yes-but” answer: 



If you make the three asterisk cuts longitudinal through the log, about 2/3 or 3/4 , of the length of the log, there is automatically somehow a central hole. 

To get this type of hole down to bottom, -and not to make high “cake-wedges” falling apart- Make the same asterisk cuts beginning from bottom, but only the needed amount of 1/ 4 or 1/3 . 

__And__ set the in-cuts precisely in the round __between__ the in-cuts coming from top. So the log holds together. 

The in-cuts from top and from bottom must overlap a little bit, otherwise there is no central hole running without stop from bottom to top. 



My experience with a very dry pine-log last year: 

With some wind you get an unsymmetrical burn. 

By the thread now I got the idea, one could experiment with aluminium-foil, partly wrapped round the log. – Many different manners possible-. 



Happy camp-fire experiments 



Martin 




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