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<div class="moz-cite-prefix">On 08/05/2012 02:50 PM, Rok Oblak
wrote:<br>
</div>
<blockquote
cite="mid:CAB-CVjVrP1+Jq377oQDzZqsCz48g2sEhRcaC4u5voa3FKTHT+w@mail.gmail.com"
type="cite">An additional comment regarding the gap around the
briquette - At later stages of burning the briquette partially
shrinks and starts to burn from the outside as well, this helps to
burn faster in that stage which is really important as briquettes
give loads of CO in late stage and burn less powerful. The gap
around is a simple feature helping the briquette to burn equally
at all stages</blockquote>
<br>
Back when I was studying solid fueled rockets (please, no rocket
science jokes), I noticed that the center holes were NOT round for
constant thrust, but were star or polygonal shaped. The inner area
was constant as the fuel/oxidizer burned.<br>
<br>
It seems if the inside of a briquette were not round (so there was
more exposed area), energy output over the burn could either be
higher at the beginning or constant throughout the burn. If you
look at a simple splined shaft, for example, the opening has much
more area initially, but when the spline burns through, the area
drops.<br>
<br>
Thoughts and comments gracelessly accepted here.<br>
<br>
Dave 8{)<br>
<br>
<div class="moz-signature">-- <br>
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