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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>Dear Dr Paul A, Ray and Selmar<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I <i>really</i> like the detached fan that Ray used on his TLUD.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><<a href="http://www.youtube.com/watch?v=JOuoE2KAbQI"><span style='color:windowtext;text-decoration:none'>http://www.youtube.com/watch?v=JOuoE2KAbQI</span></a>> <o:p></o:p></p><p class=MsoPlainText><span style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span style='color:black'>This solves many heat related problems that everyone building these stoves in the early days have reported: heat conducted to the fan assembly. Paul in Vietnam has mounted the fan well off to the side on a hollow stalk. One of the Indian stoves has a pretty long extension. <o:p></o:p></span></p><p class=MsoPlainText><span style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span style='color:black'>Because the fan is often powered by batteries anyway, why simply not make it a detached device?? What a great idea. Then the placement of the output nozzle can be turned to the side to change the air induction, instead of having to make a PWMR (electronic) speed control. KISS, if you know what I mean.<o:p></o:p></span></p><p class=MsoPlainText><span style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span style='color:black'>I encourage all the TLUD builders from Paul to Paal to consider increasing the space allowed for combusting the gas, learning from my own extensive testing of semi-gasifiers. There is not enough flame space in nearly all these devices to get complete gas combustion. Don't let the good be the enemy of the great. Just because it works well does not mean you should not rebuild for perfection.<o:p></o:p></span></p><p class=MsoPlainText><span style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span style='color:black'>To shorter the flame space you need good pre-mixing which Paul in Vietnam is struggling with right now. It is not all that straight forward. Making the flame space longer is easier than making dozens of trials with premixing.<o:p></o:p></span></p><p class=MsoPlainText><span style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span style='color:black'>Regards<br>Crispin<o:p></o:p></span></p><p class=MsoPlainText><span style='color:black'><o:p> </o:p></span></p></div></body></html>