<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'>Martin (with cc to stoves list +1 )<br> <br> Thanks. <br><br> 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).<br> <br> For anyone with experience with hand-held battery-powered drills. Are there any recognized upper limits for drill diameter and length?<br><br>Ron<br><br><hr id="zwchr"><b>From: </b>"Martin Dr. Boll" <boll.bn@t-online.de><br><b>To: </b>stoves@lists.bioenergylists.org<br><b>Cc: </b>"Frans Peeters" <peetersfrans@telenet.be><br><b>Sent: </b>Tuesday, July 19, 2011 1:54:02 PM<br><b>Subject: </b>Re: [Stoves] Fire Stump<br><br>
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<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial" lang="EN-GB">Ron,</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">To your question: </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB"><6. I wish I
had seen how difficult it was to drill the central hole of the Rocket design. </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB"><Is there a
power tool on the market like the chain saw <(but for drilling holes)? </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB"> </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">A “yes-but”
answer:</span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB"> </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">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.</span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">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 . </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">__And__ set the
in-cuts precisely in the round __between__ the in-cuts coming from top. So the
log holds together.</span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">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.</span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB"> </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">My experience
with a very dry pine-log last year: </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">With some wind
you get an unsymmetrical burn.</span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">By the thread now
I got the idea, one could experiment with aluminium-foil, partly wrapped round
the log. – Many different manners possible-.</span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB"> </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">Happy camp-fire
experiments</span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB"> </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" lang="EN-GB">Martin </span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font face="Courier New" size="2"><span style="font-size:10.0pt;font-family:"Courier New"" 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"> </span></font></p>
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