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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>So is the oil around the armature as well as between the seals? <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Alan via Personal_Submersibles<br><b>Sent:</b> Friday, 1 April 2016 12:36 p.m.<br><b>To:</b> Personal Submersibles General Discussion<br><b>Subject:</b> Re: [PSUBS-MAILIST] MK 2 Brushless Thruster<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hugh,<o:p></o:p></p></div><div><p class=MsoNormal>it will see it equally from both sides. The system is oil filled & compensated with air<o:p></o:p></p></div><div><p class=MsoNormal>pressure further up the wiring tube, the oil will extend up the wiring tube & fill all the<o:p></o:p></p></div><div><p class=MsoNormal>housing cavities in case this isn't clear.<o:p></o:p></p></div><div><p class=MsoNormal>Cheers Alan<br><br>Sent from my iPad<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>On 1/04/2016, at 12:23 pm, Hugh Fulton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Alan the inner seal will see all the pressure. Hugh</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Personal_Submersibles [<a href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br><b>Sent:</b> Friday, 1 April 2016 11:48 a.m.<br><b>To:</b> Personal Submersibles General Discussion<br><b>Subject:</b> [PSUBS-MAILIST] MK 2 Brushless Thruster</span><o:p></o:p></p></div></div><p class=MsoNormal> <o:p></o:p></p><div><div id="yui_3_16_0_ym18_1_1459461551941_7015"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>This is the latest iteration.</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7016"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>The purpose of the project is to adapt a mass produced brushless DC motor</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7078"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>manufactured for the hobby market, to a direct drive low maintenance thruster</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7088"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>purpose built for submersibles. The motor can run at 2000W continuously but</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7137"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>will probably only need to be run at less than half of that for a reasonable</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7138"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>underwater speed.</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7139"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>In this version I have taken all the axial load off the 2 small motor bearings by</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7140"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>putting 2 circlips on the propeller shaft either side of the main bearing at the front</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7183"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>of the housing (second circlip not visible in dwg). Also I have used a larger outer </span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7247"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>rotary seal to be able to press it against a shoulder. The inner seal sees no pressure differential & is pressed against an internal circlip on one side. </span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7267"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>Some of the design is dictated by the assembly process. In assembly I will need to </span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7352"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>first press in the bearing then push through the propeller shaft with the internal clip on. </span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7353"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>Next assemble the housing then fit the second shaft circlip & finally the seals.</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7377"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>The motor is located in the back housing with 4 pins.</span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7570"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'>Alan </span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7397"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'> </span><o:p></o:p></p></div><div id="yui_3_16_0_ym18_1_1459461551941_7327"><p class=MsoNormal style='background:white'><span style='font-family:"helveticaneue","serif";color:black'> </span><o:p></o:p></p></div></div></div></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></p></div></blockquote></div></body></html>