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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Thanks for the update, Alan.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>It looks like your research is coming along quite well.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Tim<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br><b>Sent:</b> Saturday, January 30, 2016 1:47 AM<br><b>To:</b> Personal Submersibles General Discussion <personal_submersibles@psubs.org><br><b>Subject:</b> [PSUBS-MAILIST] Brushless thruster test<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I had an initial pool test of my brushless thruster yesterday.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Thruster is on projects page <a href="http://www.psubs.org/projects/1235435392/brushlessthruster/" id="yui_3_16_0_1_1454145865918_2517">http://www.psubs.org/projects/1235435392/brushlessthruster/</a><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>A bit of a mixed bag. Firstly I was testing it on 36-37 V & not 44 that it was designed for,<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>due to size restrictions on import of Lithium polymer batteries. I will buy the additional voltage.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> I was getting 5kg (11lb) thrust off 150W & 10kg (22lb) off 515W, which is comparable &<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>better than some commercial direct drive BLDC thrusters that I have specs on.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>However I got to 13kg thrust & the propeller seemed to slip at that point & even though <o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>it was running at 2,200W I wasn't getting any more thrust. I was only a couple of feet out <o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>from the pool edge when testing, so that could be contributing.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Another factor could have been that the seal leaked badly & the motor was short circuiting <o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>through the water. Why did the seal leak? Possibly I damaged it hammering it in to it's housing<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>or because I didn't polish up the propeller shaft. <o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I have other motors I will be testing, so a lot more work & learning to do on this one.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I did notice I had the same problem as Cliff, with the motor wiring starting to wear through<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>where it comes out of the housing.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1454145865918_2479"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Cheers Alan<o:p></o:p></span></p></div></div></div></body></html>