<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">I´m in Cambodia at this moment for the Global Allinace for indoor cook stoves, I have been working with Dr. Larry Winiarski the inventor of the rocket combustion chamber and the measures do not depend on any one opinion, depend on what tipe of stove you want to make, the combustion chamber have to be designed acording to size of the stove and the use you wanto make from this stove. I tried many models but at the end Larry´s is allways rigth the <SPAN class=hps closure_uid_639806864="866" xd="null">the size</SPAN> <SPAN class=hps closure_uid_639806864="867" xd="null">of</SPAN> <SPAN class=hps closure_uid_639806864="868" xd="null">the stove</SPAN> <SPAN class=hps closure_uid_639806864="869" xd="null">is very important for</SPAN> <SPAN class=hps closure_uid_639806864="870"
xd="null">performance and</SPAN> <SPAN class=hps closure_uid_639806864="871" xd="null">it</SPAN> <SPAN class=hps closure_uid_639806864="872" xd="null">must be with</SPAN> <SPAN class=hps closure_uid_639806864="873" xd="null">appropriate measures</SPAN> <SPAN class=hps closure_uid_639806864="874" xd="null">of</SPAN> <SPAN style="RIGHT: auto" class=hps closure_uid_639806864="875" xd="null">the combustion chamber, pleas contac Larry for advise.</SPAN></SPAN></div>
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<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px; RIGHT: auto"><SPAN style="RIGHT: auto"><SPAN style="RIGHT: auto" class=hps closure_uid_639806864="875" xd="null">Gustavo<VAR id=yui-ie-cursor></VAR></SPAN></SPAN></div>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Adrian <admin@rocketworks.org><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> "rongretlarson@comcast.net" <rongretlarson@comcast.net> <BR><B><SPAN style="FONT-WEIGHT: bold">Cc:</SPAN></B> "alternativeworks@gmail.com" <alternativeworks@gmail.com>; Discussion of biomass cooking stoves <stoves@lists.bioenergylists.org> <BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, March 15, 2013 2:40 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [Stoves] Three (?) Stoves from Rockworks<BR></FONT></DIV><BR>
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<DIV style="RIGHT: auto">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" rel=nofollow target=_blank ymailto="mailto:rongretlarson@comcast.net">rongretlarson@comcast.net</A> wrote:<BR><BR></DIV>
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<DIV style="FONT-FAMILY: Arial; COLOR: #000000; FONT-SIZE: 12pt">Crispin and list (maybe) adding Richard Pocock)<BR><BR>A nice site for this stove is <A href="http://www.rocketworks.org/" rel=nofollow target=_blank>www.rocketworks.org/</A> (same as Crispin gave last year and below)<BR><BR>Few questions below<BR>
<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><B>From: </B>"Crispin Pemberton-Pigott" <<A href="mailto:crispinpigott@gmail.com" rel=nofollow target=_blank ymailto="mailto:crispinpigott@gmail.com">crispinpigott@gmail.com</A>><BR><B>To: </B>"Stoves" <<A href="mailto:stoves@lists.bioenergylists.org" rel=nofollow target=_blank ymailto="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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<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">Dear Friends</SPAN></div>
<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt"> </SPAN></div>
<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">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></div>
<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt"> <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></div>
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<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">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></div>
<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt"> <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></div>
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<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">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></div>
<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt"> <B>[RWL: How can I find the full set of data you are reporting here?</B></SPAN></div>
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<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">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></div>
<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt"><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></div></DIV>
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<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">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></div>
<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt"> <B>[RWL: I also hope so.]</B><BR></SPAN></div>
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<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">Regards</SPAN></div>
<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt">Crispin</SPAN></div>
<div class=yiv1336226780MsoNormal><SPAN style="COLOR: #1f497d; FONT-SIZE: 11pt"> </SPAN></div>
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<div class=yiv1336226780MsoNormal><SPAN style="FONT-SIZE: 10pt">Date: Tue, 11 Dec 2012 22:06:43 +0800<BR>Subject: [Stoves] Three (?) Stoves from Rockworks</SPAN></div>
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<div class=yiv1336226780MsoNormal><SPAN style="FONT-SIZE: 10pt">Dear Friends of Rocketry</SPAN></div>
<div class=yiv1336226780MsoNormal><SPAN style="FONT-SIZE: 10pt">There are some all-metal <SPAN style="BACKGROUND: #ffffcc">Rocket</SPAN> stoves at <A href="http://www.rocketworks.org/" rel=nofollow target=_blank>http://www.<SPAN style="BACKGROUND: #ffffcc; COLOR: #222222">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></div>
<div class=yiv1336226780MsoNormal><SPAN style="FONT-SIZE: 10pt"> Performance of both not yet known.</SPAN></div>
<div class=yiv1336226780MsoNormal><SPAN style="FONT-SIZE: 10pt"> Regards</SPAN></div></DIV>
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<div class=yiv1336226780MsoNormal><SPAN style="FONT-SIZE: 10pt">Crispin</SPAN></div></DIV>
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