<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'>Martin<br><br> The videos of this approach show them as being interesting and unusual. Is there anything at all practical? It seems you had one ignition in a horizontal position; I wonder if you tried it vertical?<br><br> With the wrapped aluminum, you can have more control of airflow, <br><br> My interest is in whether there is any configuration that ends up with charcoal?<br><br> Thanks for the continued information and photos.<br><br>Ron<br><br><hr id="zwchr"><b>From: </b>"Martin Dr. Boll" <boll.bn@t-online.de><br><b>To: </b>rongretlarson@comcast.net<br><b>Cc: </b>"Frans Peeters" <peetersfrans@telenet.be>, "Frank Shields" <frank@compostlab.com>, stoves@lists.bioenergylists.org<br><b>Sent: </b>Thursday, July 21, 2011 2:01:38 PM<br><b>Subject: </b>Re: Fire Stump / stump-incuts<br><br>
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<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10.0pt;
font-family:Arial">Ron,</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">- Frans, Frank and „Stomp-Stovers“ -</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Here some pictures from a fire-stump. It is laying
around in a garage for a year of three. I just took the pictures to explain,
without need of many words.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">With such a type (but with bark) I did my test as I
described in the stoves-list. But that burn was without aluminium-foil. </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">I was discontent with my first test, which I made in
summer last year. The burn of the dry pine-stump did not happen as
symmetrically as I expected, and the stump had several times to be turned for
using the wind direction to direct the burn.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">The in-cuts from the bottom were done too high, so
the stump burnt too early in pieces. The central channel appeared in begin too small.
(A commercial fire-stump in the web has on top a sort of dish/cup which seems to
work better)</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">The idea to wrap it (in different test in somehow
different manners) with aluminium-foil came by reading the thread about the
fire-stump. So I cannot say anything about that. I have not yet planned how to
play with the foil-wrapping. Here is for the moment lack of time and appropriate
weather. But possibly is someone interested in that first step to struggle
further.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">The difference with this stump is:</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">There is a channel from top to bottom, not made by a
drill, but by chain-saw-in-cuts in 60° angles</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Picture 001 shows that by a metal-stick going through
the central-hole.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Picture 008 shows (with good will of the viewer) that
the asterisk has a central channel, going through.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Pictures 010 and 012 show the different position of
the in-cuts from bottom in comparison to the in-cuts from the top,</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">-By going further with fire-stumps, I think it would
be useful to remind the old-fashioned type of saw-dust –stoves with the
central hole.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Regards </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Martin</span></font></p>
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