<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hugh,</div><div>it will see it equally from both sides. The system is oil filled & compensated with air</div><div>pressure further up the wiring tube, the oil will extend up the wiring tube & fill all the</div><div>housing cavities in case this isn't clear.</div><div>Cheers Alan<br><br>Sent from my iPad</div><div><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:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Generator" content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><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<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 [<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<o:p></o:p></span></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.<o:p></o:p></span></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<o:p></o:p></span></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<o:p></o:p></span></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<o:p></o:p></span></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<o:p></o:p></span></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.<o:p></o:p></span></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<o:p></o:p></span></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<o:p></o:p></span></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 <o:p></o:p></span></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. <o:p></o:p></span></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 <o:p></o:p></span></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. <o:p></o:p></span></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.<o:p></o:p></span></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.<o:p></o:p></span></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 <o:p></o:p></span></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"><o:p> </o:p></span></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"><o:p> </o:p></span></p></div></div></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></body></html>