<html><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_1414711859269_7651" dir="ltr"><span>Hank,</span></div><div id="yui_3_16_0_1_1414711859269_7651" dir="ltr"><span>was it brushless?</span></div><div id="yui_3_16_0_1_1414711859269_7651" dir="ltr"><span id="yui_3_16_0_1_1414711859269_10405">Did an ebay search on brushless 48V but not anything suitable.</span></div><div id="yui_3_16_0_1_1414711859269_7651" dir="ltr">Getting the low rpm is proving difficult.</div><div id="yui_3_16_0_1_1414711859269_7651" dir="ltr">There are 26,000 listings under Brushless motor on Ebay :(</div><div id="yui_3_16_0_1_1414711859269_7651" dir="ltr">Alan</div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1414711859269_7656"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1414711859269_7655"> <div dir="ltr" id="yui_3_16_0_1_1414711859269_7654"> <hr size="1" id="yui_3_16_0_1_1414711859269_10404"> <font size="2" face="Arial" id="yui_3_16_0_1_1414711859269_7657"> <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> Friday, October 31, 2014 12:09 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Alan needs a motor<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1414711859269_7658"><br><br clear="none">Alan,<br clear="none">I am not talking about a hub motor, the motor I am looking at is in the 3 to 4 in dia range. <br clear="none">Hank--------------------------------------------<br clear="none">On Thu, 10/30/14, Alan James via Personal_Submersibles <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org" id="yui_3_16_0_1_1414711859269_10403">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"> Subject: Re: [PSUBS-MAILIST] Alan needs a motor<br clear="none"> To: "Personal Submersibles General Discussion" <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org" id="yui_3_16_0_1_1414711859269_10402">personal_submersibles@psubs.org</a>><br clear="none"> Received: Thursday, October 30, 2014, 4:22 PM<br clear="none"> <br clear="none"> Thanks<br clear="none"> Hank & Graham.I am<br clear="none"> probably searching for Nirvana here.First I<br clear="none"> am set on finding a brushless motor<br clear="none"> solution.I spent<br clear="none"> multiple hours of Googling, focusing on E-bikes, scooters<br clear="none"> etc.The<br clear="none"> E-bikes are mainly hub motors that are narrow with a large<br clear="none"> diameter, whichis no<br clear="none"> good as far as drag is concerned, plus you need a big prop<br clear="none"> to get out beyondthe<br clear="none"> diameter of the motor. There are units with 5-1 gear box<br clear="none"> ratios at 48V 1500Wbut they<br clear="none"> can weigh around 14kg. I bought an 1850W Hobby King BLDC<br clear="none"> outrunnermotor for<br clear="none"> $56- & it weighs 530 grams. So more powerful &<br clear="none"> 1/27th the weight.This does<br clear="none"> 236 rpm per volt, & from what I've read you<br clear="none"> don't want to be turning yourprop at<br clear="none"> more than 3000rpm on a sub. This means I would have to drive<br clear="none"> this motor with a maximum<br clear="none"> of 12V & it's rated for a maximum of<br clear="none"> 37.To<br clear="none"> disipate the heat from the stationary inner coil of an<br clear="none"> outrunner, I may be forced togo with<br clear="none"> oil compensation; which is what most commercial brushless<br clear="none"> thrusters are anyway.One<br clear="none"> solution I can see is to go with a much larger hobby type<br clear="none"> motor & run it way belowit's<br clear="none"> maximum voltage to keep the revs down. Also I wouldn't<br clear="none"> be thrashing the motorwhich<br clear="none"> may help it live a lot longer.Need to<br clear="none"> do a lot more study here, then experimentation with motors<br clear="none"> & props in water.AlanP.S. Hank<br clear="none"> I was given a motorized Golf trundler & converted it to<br clear="none"> a trike with ape hangersand<br clear="none"> pink banana seat for my girls. Boy did they love showing off<br clear="none"> on that.<br clear="none"> <br clear="none"> From: hank pronk via<br clear="none"> Personal_Submersibles<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"> To:<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"> Sent: Friday, October<br clear="none"> 31, 2014 1:32 AM<br clear="none"> Subject:<br clear="none"> [PSUBS-MAILIST] Alan needs a motor<br clear="none"> <br clear="none"> <br clear="none"> Alan,<br clear="none"> I just went on ebay and<br clear="none"> found a 1,000 watt 48v brushless motor with controller for<br clear="none"> 200 dollars. It is for an electric bike. I bought one<br clear="none"> for my son a few years back and it was amazing. He was<br clear="none"> driving it all over town and towing his buddy on his skate<br clear="none"> board. Just type in brushless 48 v motor.<br clear="none"> You won't need a gearbox either.<br clear="none"> Hank<br clear="none"> _______________________________________________<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"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> -----Inline Attachment Follows-----<br clear="none"> <br clear="none"> _______________________________________________<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><div class="qtdSeparateBR"><br><br></div><div class="yqt6776989595" id="yqtfd44955"><br clear="none"> <br clear="none"><br clear="none">_______________________________________________<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></div><br><br></div> </div> </div> </div></body></html>