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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Ron,</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Oops! It should have been “your” instead of “you’re”. </p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The way I see it, your and Crispin’s comments both add information to this discussion.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kirk H.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:gkharris316@comcast.net">Kirk H.</a><br><b>Sent: </b>Friday, April 26, 2019 11:23 AM<br><b>To: </b><a href="mailto:rongretlarson@comcast.net">Ronal Larson</a><br><b>Cc: </b><a href="mailto:stoves@lists.bioenergylists.org">Discussion of biomass cooking stoves</a><br><b>Subject: </b>Re: [Stoves] Simple Modifications to Traditional WoodCookstoves-Rocks and Clay Grates</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Ron,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I would agree that flames going up the sides of the first pot would indicate the pots are in parallel, however when I look at Kevin’s video I see flame going from the first pot to the second, which is series. I also see the flame in the back going directly to the second pot, which is parallel. I think you and Crispin are both right.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kevin is doing excellent work, and you’re and Crispin’s comments are also excellent.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kirk H.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From: </b><a href="mailto:rongretlarson@comcast.net">Ronal Larson</a><br><b>Sent: </b>Friday, April 26, 2019 10:28 AM<br><b>To: </b><a href="mailto:gkharris316@comcast.net">Kirk H.</a><br><b>Cc: </b><a href="mailto:stoves@lists.bioenergylists.org">Discussion of biomass cooking stoves</a><br><b>Subject: </b>Re: [Stoves] Simple Modifications to Traditional Wood Cookstoves-Rocks and Clay Grates<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kirk and list:<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span> </span>See few inserts below.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Apr 25, 2019, at 3:31 PM, Kirk H. <<a href="mailto:gkharris316@comcast.net">gkharris316@comcast.net</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>All,<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Concerning whether this stove is in parallel or series, I see both. Some of the fire, in the back, goes directly to the second pot, that is parallel. Some of the flame from the front hits the first pot and then passes on to the second, that is series. <o:p></o:p></p></div></div></blockquote><div><p class=MsoNormal><span class=apple-tab-span> </span><b>[RWL: I can agree some but If the first pot allows flame up the sides of the pot, would you agree that has no series aspect?</b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span><b> </b></span><b>The main point I didn’t emphasize enough is that Kevin has started with the simplest possible type of Rocket. With almost zero cost, he has added two parallel bricks in front of the normal Rocket opening, This makes the “fuel combustion region” twice as long as normal (the original fuel area only now being minimally used). The pot sitting on these two new added bricks seems to be receiving about half of the useful energy (more or less is now being tested in Uganda). I think this is a brilliant addition to ANY rocket - but Kevin’s Rocket is also near zero cost (his bricks are costing less than a nickel each).</b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span><b> </b></span><b>His emphasis on giving away ideas rather than selling products is what makes me so interested in his work. And using church networks for dissemination. And even more low-cost dissemination approaches are in the works!</b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span><b> </b></span><b>He is accomplishing a large amount on a minimum budget. Think what could happen with a iittle more money.</b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span><b> </b></span><b>I have avoided 3-stone fires for 25 years. A mistake.</b><o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>The use of grooves instead of a pot stand would decrease the open area, and so increase the flow resistance at the second pot. This may be to direct some heat to the front pot and keep all of the heat from going directly to the small chimney which has the most draft.<o:p></o:p></p></div></div></blockquote><div><p class=MsoNormal><span class=apple-tab-span> </span><b>[RWL: Nice idea. </b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span><b> </b></span><b>Kevin has been putting most of his effort on introducing small rocks for air control. He might be able to achieve the same idea as grooves - with small rocks to similarly increase resistance.</b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span><b> </b></span><b>Anyone else have a similar idea to check out?</b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span><b> </b></span><b>Anyone seen any earlier use of a first pot in front of a Rocket?</b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span><b> </b></span><b>I am still trying to figure out a similar simple modification of TLUDs. Top lighting needs something different.</b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span class=apple-tab-span><b> </b></span><b>Note Kevin is working on three other concepts - all in the category of “give-away”. Nothing to sell. His first message a month ago was on rocks to improve air flow below the fuel. Two more concepts in the works: char-making and energy storage. Anyone want to offer their thoughts on these)non-rocket, non-airflow topics?</b><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><b>Ron</b><o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Thank you all for this great discussion and information.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Kirk H.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Sent from<span class=apple-converted-space> </span><a href="https://go.microsoft.com/fwlink/?LinkId=550986"><span style='color:#954F72'>Mail</span></a><span class=apple-converted-space> </span>for Windows 10<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><div><p class=MsoNormal><b>From:<span class=apple-converted-space> </span></b><a href="mailto:crispinpigott@outlook.com"><span style='color:#954F72'>Crispin Pemberton-Pigott</span></a><br><b>Sent:<span class=apple-converted-space> </span></b>Thursday, April 25, 2019 1:27 PM<br><b>To:<span class=apple-converted-space> </span></b><a href="mailto:rongretlarson@comcast.net"><span style='color:#954F72'>Ronal Larson</span></a>;<span class=apple-converted-space> </span><a href="mailto:stoves@lists.bioenergylists.org"><span style='color:#954F72'>Discussion of biomass cooking stoves</span></a><br><b>Subject:<span class=apple-converted-space> </span></b>Re: [Stoves] Simple Modifications to Traditional Wood Cookstoves -Rocks and Clay Grates<o:p></o:p></p></div></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span lang=EN-CA>Dear Ron</span><o:p></o:p></p></div><div><p class=MsoNormal><span lang=EN-CA> </span><o:p></o:p></p></div></div></blockquote></div></div><p class=MsoNormal><span class=apple-tab-span> </span><snip><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>