<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_1_1449958362760_2694"><span id="yui_3_16_0_1_1449958362760_2693">Hank,</span></div><div id="yui_3_16_0_1_1449958362760_2692"><span id="yui_3_16_0_1_1449958362760_2691">I thought they were made in Canada!</span></div><div id="yui_3_16_0_1_1449958362760_2692"><span id="yui_3_16_0_1_1449958362760_2753">Have tried searching but can't find them.</span></div><div id="yui_3_16_0_1_1449958362760_2692"><span id="yui_3_16_0_1_1449958362760_2754">I believe they were DC, brushless, submersible well pumps, with magnetic couplers.</span></div><div id="yui_3_16_0_1_1449958362760_2692"><span id="yui_3_16_0_1_1449958362760_2830">Have been known to be wrong.</span></div><div id="yui_3_16_0_1_1449958362760_2692"><span>Alan</span></div><div id="yui_3_16_0_1_1449958362760_2692"><span><br></span></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1449958362760_2723"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1449958362760_2722"> <div dir="ltr" id="yui_3_16_0_1_1449958362760_2721"> <font size="2" face="Arial" id="yui_3_16_0_1_1449958362760_2720"> <hr size="1" id="yui_3_16_0_1_1449958362760_2719"> <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> Sunday, December 13, 2015 4:50 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Compensating oil<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1449958362760_2831"><br><div id="yiv5394589665"><div id="yui_3_16_0_1_1449958362760_2834"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;" id="yui_3_16_0_1_1449958362760_2833"><div id="yiv5394589665yui_3_16_0_1_1449935127885_2940"><span>Alan,</span></div><div id="yiv5394589665yui_3_16_0_1_1449935127885_2940"><span id="yui_3_16_0_1_1449958362760_2832">No clue on brand, there is </span>substantial thrust protection because the motor sits vertical and the weight of the armature is always on the thrust mechanism. If I recall, they have bushings not bearings. If you can add reverse and speed control, you have a winner. I just have no expertise in that area.</div><div id="yiv5394589665yui_3_16_0_1_1449935127885_2940">Hank</div> <br clear="none"><div class="yiv5394589665qtdSeparateBR" id="yui_3_16_0_1_1449958362760_2835"><br clear="none"><br clear="none"></div><div class="yiv5394589665yahoo_quoted" style="display:block;" id="yui_3_16_0_1_1449958362760_2839"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;" id="yui_3_16_0_1_1449958362760_2838"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_1_1449958362760_2837"> <div class="qtdSeparateBR" id="yui_3_16_0_1_1449958362760_2836"><br><br></div><div class="yiv5394589665yqt5402818306" id="yiv5394589665yqt63668"><div dir="ltr" id="yui_3_16_0_1_1449958362760_2841"><font size="2" face="Arial" id="yui_3_16_0_1_1449958362760_2840"> On Saturday, December 12, 2015 8:22 AM, Alan via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv5394589665y_msg_container" id="yui_3_16_0_1_1449958362760_2844"><div id="yiv5394589665"><div id="yui_3_16_0_1_1449958362760_2843"><div id="yui_3_16_0_1_1449958362760_2842">It should be relatively easy to add reverse, but </div><div id="yui_3_16_0_1_1449958362760_2845">I presume they are either on or off, so you would need the addition of</div><div>a speed controller anyway. It would be interesting to pull one apart.</div><div id="yui_3_16_0_1_1449958362760_2846">There might not be much in the way of a thrust bearing, as the pump impeller </div><div id="yui_3_16_0_1_1449958362760_2847">wouldn't have an axial load on the shaft like a propeller.</div><div id="yui_3_16_0_1_1449958362760_2848">What brand was it again?</div><div id="yui_3_16_0_1_1449958362760_2849">Alan</div><div><br clear="none"></div><div id="yui_3_16_0_1_1449958362760_2850"><br clear="none"><br clear="none">Sent from my iPad</div><div class="yiv5394589665yqt5877082636" id="yiv5394589665yqt40931"><div id="yui_3_16_0_1_1449958362760_2851"><br clear="none">On 13/12/2015, at 2:35 am, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite" id="yui_3_16_0_1_1449958362760_2854"><div id="yui_3_16_0_1_1449958362760_2853"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;" id="yui_3_16_0_1_1449958362760_2852"><div id="yiv5394589665yui_3_16_0_1_1449926923942_2618"><span>Alan,</span></div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449926923942_2618"><span id="yiv5394589665yui_3_16_0_1_1449926923942_2830">I am still in favour of pump motors except I do not know how to reverse them. As far as I can tell they are not </span>reversible. The efficiency in oil comes from the extremely smooth interior of the motor. If you could reverse them, they would be perfect, they are cheap at about 200 dollars for a small 120v and they would be pretty easily modified to take a prop. Oh ya, and they already have thrust bearings. The oil inside was real stinky, kinda like antifreeze.</div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449926923942_2618">Hank</div> <br clear="none"><div class="yiv5394589665qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv5394589665yahoo_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 Saturday, December 12, 2015 3:24 AM, Alan James via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv5394589665y_msg_container"><div id="yiv5394589665"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6619">Hank, </div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6619">what ever happened to your idea of using a submersible pump as a thruster?</div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6619">Have just been doing a bit of reading on oil compensation of submersible pumps.</div><div id="yiv5394589665yui_3_16_0_1_1449865396752_6613">In this article....</div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613"><a rel="nofollow" shape="rect" id="yiv5394589665yui_3_16_0_1_1449865396752_6621" target="_blank" href="http://www.pumped101.com/oilvsair.pdf">http://www.pumped101.com/oilvsair.pdf</a><br clear="none"></div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613">it states that with oil compensation there is only a loss of about 1&1/2% efficiency </div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613">over an air compensated motor.....</div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613"> "What
does reduce an oil filled motor’s efficiency is the energy loss due to oil
circulation within the stator housing. </div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613">As a rule of thumb, this circulation
requirement reduces efficiency by about 1.5% when compared to an air filled
motor. "<br clear="none"></div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613"> Of interest was that they base this on the use of an oil "Shellflex 210" which has a viscosity of 20.3 cst at 40C.</div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613">I was recently trying to track down a silicone oil of 3cst thinking that I would need a really low viscosity to get reasonable efficiency.</div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613">A chemist I spoke to said at that low a viscosity it would be flammable.</div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613">Alan</div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613"><br clear="none"></div><div dir="ltr" id="yiv5394589665yui_3_16_0_1_1449865396752_6613"><br clear="none"></div></div></div></div><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">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></blockquote></div><blockquote type="cite"><div><span>_______________________________________________</span><br clear="none"><span>Personal_Submersibles mailing list</span><br clear="none"><span><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br clear="none"><span><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br clear="none"></div></blockquote></div></div><br clear="none"><div class="yiv5394589665yqt5877082636" id="yiv5394589665yqt80157">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br clear="none"><br clear="none"></div></div> </div> </div> </div></div></div></div><br><div class="yqt5402818306" id="yqt78909">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div></div></body></html>