<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div><span>Alan,</span></div><div id="yui_3_16_0_ym18_1_1459464919366_9838"><span>Looking good! you could eliminate that external compensating hose by drilling a horizontal hole to intersect the vertical passage leading to the tube. The oil could pass by the </span>armature and feed the passage leading to the bearing void.</div><div id="yui_3_16_0_ym18_1_1459464919366_9839"><br></div><div id="yui_3_16_0_ym18_1_1459464919366_9839">Hank</div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Thursday, March 31, 2016 4:51 PM, Alan James via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv7243371521"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7015"> This is the latest iteration.</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7016">The purpose of the project is to adapt a mass produced brushless DC motor</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7078" dir="ltr">manufactured for the hobby market, to a direct drive low maintenance thruster</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7088" dir="ltr">purpose built for submersibles. The motor can run at 2000W continuously but</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7137" dir="ltr">will probably only need to be run at less than half of that for a reasonable</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7138" dir="ltr">underwater speed.</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7139" dir="ltr">In this version I have taken all the axial load off the 2 small motor bearings by</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7140" dir="ltr">putting 2 circlips on the propeller shaft either side of the main bearing at the front</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7183" dir="ltr">of the housing (second circlip not visible in dwg). Also I have used a larger outer </div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7247" dir="ltr">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. </div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7267" dir="ltr">Some of the design is dictated by the assembly process. In assembly I will need to </div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7352" dir="ltr">first press in the bearing then push through the propeller shaft with the internal clip on. </div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7353" dir="ltr">Next assemble the housing then fit the second shaft circlip & finally the seals.</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7377" dir="ltr">The motor is located in the back housing with 4 pins.</div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7570" dir="ltr">Alan </div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7397" dir="ltr"><br></div><div id="yiv7243371521yui_3_16_0_ym18_1_1459461551941_7327" dir="ltr"><br></div></div></div></div><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></div></body></html>