<html><head><base href="x-msg://60/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Good insights Crispin,<div><br></div><div>Re V pattern versus straight spiral: It was enough of a challenge to get the artisans to hold the necessary 2mm wobble tolerance thru one full revolution. Besides the spike elements are cut off concrete nails : they have inbuilt lengthwise striations . Little long axis side-thrust material along the long-axis. We also experimented with addition of a chopper element such as shown in its larger TMC cousin (on website). The chopper element in the TMC definitely required a flywheel which was created by the 12, ½" thick x 2" x 7" long cutter bars welded onto the periphery of that machine's rotor. </div><div><br></div><div>In as much of the action of the mini TMC is pen fo frequent ocscillation ( for the mentioned desired slashing effect of harder materials) : A flywheel would add little benefit in such case. The fact that the cutter bars are mounted in rubber increases momentum thru the returning slashing action of the cutter bars themselves. </div><div>The fact of reversing direction frequently would also tend to negate the center concentrating benefit of a V wedge design if ther were one, in either case I think. </div><div>Will be testing it a bit further here ( in Nicaragua) before putting out the manual for it in a month or so. </div><div><br></div><div>Richard </div><div><br></div><div><br><div><div>On Apr 15, 2014, at 9:13 AM, Crispin Pembert-Pigott wrote:</div><br class="Apple-interchange-newline"><span class="Apple-style-span" style="border-collapse: separate; font-family: Verdana; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div lang="EN-CA" link="blue" vlink="purple"><div class="WordSection1" style="page: WordSection1; "><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">Dear Richard<o:p></o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">I am surprised to see the working bits of the mini TMC have a spiral from one side to the other for the reason that it creates a constant thrust in one direction. Have you not tried putting a Vee-pattern rather like a tractor tire, bringing everything constantly to the centre and away from the edges?<o:p></o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">That takes the load off the side walls and removes the axial thrust. It looks like a pretty good unit. Is there a flywheel hidden in there somewhere?<o:p></o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">Thanks<br>Crispin<o:p></o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; ">Our mini TMC (developed for use here in Central America)is less technically sensitive, more manageable in the field with less skills and lighter at 25 kegs but it is not <o:p></o:p></div></div><div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; ">designed to handle coconut husks. <o:p></o:p></div></div><div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; "> <img width="240" height="240" id="_x0036_962fcf0-05fb-4968-b883-adaefb8ec65e" apple-width="yes" apple-height="yes" src="cid:image001.png@01CF589B.AFA205C0"><img width="240" height="293" id="d7a019a1-afb3-4e4c-b102-64eabed89277" apple-width="yes" apple-height="yes" src="cid:image002.png@01CF589B.AFA205C0"><o:p></o:p></div></div><div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 12pt; font-family: 'Times New Roman', serif; ">would not. <o:p></o:p></div></div></div>_______________________________________________<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" style="color: blue; text-decoration: underline; ">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" style="color: blue; text-decoration: underline; ">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://stoves.bioenergylists.org/" style="color: blue; text-decoration: underline; ">http://stoves.bioenergylists.org/</a><br><br></div></span></div><br></div></body></html>