<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>How much does the stove cost?<br><br>Sent from my iPad</div><div><br>On Mar 15, 2013, at 1:40 AM, Adrian <<a href="mailto:admin@rocketworks.org">admin@rocketworks.org</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>Richard did post a full reply to this enquiry, just not sure that it got posted on to the people in question? Kind regards Adrian<br><br>Sent from my iPhone</div><div><br>On 20 Feb 2013, at 2:43 AM, <a href="mailto:rongretlarson@comcast.net">rongretlarson@comcast.net</a> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family: Arial; font-size: 12pt; color: #000000"><style>p { margin: 0; }</style><div style="font-family: Arial; font-size: 12pt; color: #000000">Crispin and list (maybe) adding Richard Pocock)<br><br>A nice site for this stove is <a href="http://www.rocketworks.org/">www.rocketworks.org/</a> (same as Crispin gave last year and below)<br><br>Few questions below<br><hr id="zwchr"><b>From: </b>"Crispin Pemberton-Pigott" <<a href="mailto:crispinpigott@gmail.com">crispinpigott@gmail.com</a>><br><b>To: </b>"Stoves" <<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br><b>Sent: </b>Tuesday, February 19, 2013 3:47:12 PM<br><b>Subject: </b>Re: [Stoves] Three (?) Stoves from Rockworks<br><br>
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Dear Friends</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">An update on at least one version of the stove referred to below. This stove is from a company called Rocket Works though from a technical perspective it is not a classic Rocket stove by several measures. You can draw your own opinion of course.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"> <b>[RWL: I'd like to hear your set of differences. I wonder where this fits in the range described by Nordica at last ETHOS meeting in terms of dimension ratios.]</b><br></span></p><div><div><p class="MsoNormal"><span style="color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The picture attached was passed around in the public domain so it is OK to talk about it. It is interesting from a couple of perspectives. One is that it produces very little charcoal, meaning it burns the whole fuel. This is different from most Rocket stoves and in ones that have a similar layout but have a grate. Rocket stoves tend to produce charcoal which sits on the bottom of the stove under fuel. I would say this produces about ¼ as much and maintains a high combustion efficiency.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> <b>[RWL: This is first time I have heard this about charcoal and Rockets. Can some users describe the maximum amount they have ever retrieved?]</b><br></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The PM emitted on high power (using ≈12% moisture fuel) is similar to that of high end fan stoves like the Oorja burning pellets and the Philip Stove burning chopped wood, territory thought by some to be reserved for stoves with blowers. I am not saying such performance from a side-feeder was unexpected, but it is unexpected that it would be so soon. Clearly they have been playing around with it a lot. The high power PM level would place it at the upper end of Tier 3, right at the edge of Tier 4. </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> <b>[RWL: How can I find the full set of data you are reporting here?</b></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><b></b><br></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It has some measure of preheating of the primary air and definitely preheated secondary air with a side-feed of stick fuel. From the look of the structure it will not be hot to the touch (most of it) and the cost (and mass) is obviously low. Two of its technical advances are evident in the photos on their website.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><b> [RWL: This is the first time I have heard of a rocket having separate primary and secondary air supplies. Can you or Richard describe these features some more. Agreed on the nice feature of the wire mesh. Cost?</b><br></span></p></div><div><p class="MsoNormal"><span style="color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">One of the principles is the South African Richard Pocock who we know from solar cooker days. That name may ring a bell with a few of you. Perhaps he will provide some technical and performance details.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> <b>[RWL: I also hope so.]</b><br></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Crispin</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Date: Tue, 11 Dec 2012 22:06:43 +0800<br>Subject: [Stoves] Three (?) Stoves from Rockworks</span></p><div><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Dear Friends of Rocketry</span></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">There are some all-metal <span style="background:#FFFFCC">Rocket</span> stoves at <a href="http://www.rocketworks.org/" target="_blank">http://www.<span style="color:#222222;background:#FFFFCC">rocketworks</span>.org/</a> featuring a new wrinkle on the under-air pathway. They are made in South Africa. They have a gel fuel insert that makes it a dual fuel stove.</span></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> Performance of both not yet known.</span></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> Regards</span></p></div><div><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Crispin</span></p></div><p class="MsoNormal"> </p></div></div></div><br>_______________________________________________<br>Stoves mailing list<br><br>to Send a Message to the list, use the email address<br><a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><br><br>to UNSUBSCRIBE or Change your List Settings use the web page<br><a href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a><br><br>for more Biomass Cooking Stoves, News and Information see our web site:<br><a href="http://www.bioenergylists.org/">http://www.bioenergylists.org/</a><br><br></div></div></div></blockquote></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Stoves mailing list</span><br><span></span><br><span>to Send a Message to the list, use the email address</span><br><span><a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a></span><br><span></span><br><span>to UNSUBSCRIBE or Change your List Settings use the web page</span><br><span><a href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a></span><br><span></span><br><span>for more Biomass Cooking Stoves, News and Information see our web site:</span><br><span><a href="http://www.bioenergylists.org/">http://www.bioenergylists.org/</a></span><br><span></span><br></div></blockquote></body></html>