<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym18_1_1459515623241_6159"><span id="yui_3_16_0_ym18_1_1459515623241_6183">Hank,</span></div><div id="yui_3_16_0_ym18_1_1459515623241_6113" dir="ltr"><span id="yui_3_16_0_ym18_1_1459515623241_6112">the motor is an outrunner & the whole can of the motor rotates apart from the back section, so I can't </span><span id="yui_3_16_0_ym18_1_1459515623241_6104">locate the motor tight in the housing. Thanks for the thoughts on the precision </span><span id="yui_3_16_0_ym18_1_1459515623241_6162">machining of the pin holes, that confirms what I was thinking. I can drill the holes </span><span id="yui_3_16_0_ym18_1_1459515623241_6160">over size if I use the bearing, as the pins only stop the motor rotating & the slop </span></div><div id="yui_3_16_0_ym18_1_1459515623241_6218" dir="ltr"><span>will </span><span id="yui_3_16_0_ym18_1_1459515623241_6172">only be noticed going from forward to reverse.</span></div><div id="yui_3_16_0_ym18_1_1459515623241_6175" dir="ltr"><span id="yui_3_16_0_ym18_1_1459515623241_6174">The shaft from the seal compartment has to go on the high side as any water </span><span id="yui_3_16_0_ym18_1_1459515623241_6193">that gets </span></div><div id="yui_3_16_0_ym18_1_1459515623241_6195" dir="ltr"><span id="yui_3_16_0_ym18_1_1459515623241_6212">in will sink.</span></div><div id="yui_3_16_0_ym18_1_1459515623241_6200" dir="ltr"><span id="yui_3_16_0_ym18_1_1459515623241_6211">Cheers Alan</span></div><div id="yui_3_16_0_ym18_1_1459515623241_6177" dir="ltr"><span></span><br></div><div id="yui_3_16_0_ym18_1_1459515623241_6114" dir="ltr"><span></span><br></div><div class="qtdSeparateBR" id="yui_3_16_0_ym18_1_1459515623241_6201"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym18_1_1459515623241_6080" style="display: block;"> <div id="yui_3_16_0_ym18_1_1459515623241_6079" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym18_1_1459515623241_6078" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym18_1_1459515623241_6077" dir="ltr"> <font id="yui_3_16_0_ym18_1_1459515623241_6111" face="Arial" size="2"> <hr size="1" id="yui_3_16_0_ym18_1_1459515623241_6110"> <b><span style="font-weight: bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, April 2, 2016 1:40 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] MK 2 Brushless Thruster<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym18_1_1459515623241_6108"><br><div id="yiv8670034328"><div id="yui_3_16_0_ym18_1_1459515623241_6107"><div id="yui_3_16_0_ym18_1_1459515623241_6106" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);"><div id="yui_3_16_0_ym18_1_1459515623241_6221"><span>Alan,</span></div><div id="yiv8670034328yui_3_16_0_ym18_1_1459512979126_4182" dir="ltr">If you put the new channel at the bottom instead of the top-when you fill the motor with oil, the air will be push out of the seal cavity. The way you have it the air will burp out and it will be messy to fill. Pins should always be tight or they will wear. Four pins will be a bugger to drill and fit precisely. If you go with the rear bearing you only need one pin that is a bit bigger. Machining a bearing seat is easy with one pin to hold it. Or you can eliminate the rear bearing if the motor is tight in the housing.</div><div id="yiv8670034328yui_3_16_0_ym18_1_1459512979126_4182" dir="ltr">Hank</div> <div class="yiv8670034328qtdSeparateBR" id="yui_3_16_0_ym18_1_1459515623241_6109"><br clear="none"><br clear="none"></div><div class="yiv8670034328yahoo_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 class="yiv8670034328yqt1072940599" id="yiv8670034328yqt24460"><div dir="ltr"><font face="Arial" size="2"> On Friday, April 1, 2016 3:05 AM, Alan James via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv8670034328y_msg_container"><div id="yiv8670034328"><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><div> Updated version with Hanks suggestion of a channel direct</div><div dir="ltr">to the motor cavity.</div><div dir="ltr">I have also added a bearing at the wiring end of the motor shaft.</div><div id="yiv8670034328yui_3_16_0_ym18_1_1459500900511_2751" dir="ltr">I am not sure about this. It would be easier engineering wise, to locate the motor in</div><div id="yiv8670034328yui_3_16_0_ym18_1_1459500900511_2752" dir="ltr">a central back bearing & have the holes for the locating pins a bit over sized,</div><div id="yiv8670034328yui_3_16_0_ym18_1_1459500900511_2795" dir="ltr">rather than a tight fit. That way they would only serve to stop the rotation of the </div><div id="yiv8670034328yui_3_16_0_ym18_1_1459500900511_2792" dir="ltr">back section of the motor. According to my propeller calculator, adding another</div><div id="yiv8670034328yui_3_16_0_ym18_1_1459500900511_2794" dir="ltr">shaft bearing will reduce the power output by 1.5%.</div><div id="yiv8670034328yui_3_16_0_ym18_1_1459500900511_2793" dir="ltr">Alan</div><div id="yiv8670034328yui_3_16_0_ym18_1_1459500900511_2753" dir="ltr"><br clear="none"></div></div></div></div><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"><br clear="none"><br clear="none"></div></div> </div> </div> </div></div></div></div><br><div class="yqt1072940599" id="yqt23485">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>