<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_1414777251498_3802" dir="ltr"><span id="yui_3_16_0_1_1414777251498_5327">Hi Hank,</span></div><div id="yui_3_16_0_1_1414777251498_3802" dir="ltr"><span id="yui_3_16_0_1_1414777251498_3804">you forgot "divided by your wife"</span></div><div id="yui_3_16_0_1_1414777251498_3802" dir="ltr"><span id="yui_3_16_0_1_1414777251498_4939">Yes lots of options & compromises here.</span></div><div id="yui_3_16_0_1_1414777251498_3802" dir="ltr"><span id="yui_3_16_0_1_1414777251498_5326">Doug Jackson has some good videos on his site of experimentaion</span></div><div id="yui_3_16_0_1_1414777251498_3802" dir="ltr"><span id="yui_3_16_0_1_1414777251498_5325">with smaller brushless motors & various propellors, for use on a ROV.</span></div><div id="yui_3_16_0_1_1414777251498_3802" dir="ltr"><span id="yui_3_16_0_1_1414777251498_5324">In his trials he is just running them as is, in a salt water solution; so easy, don't</span></div><div id="yui_3_16_0_1_1414777251498_3802" dir="ltr"><span id="yui_3_16_0_1_1414777251498_5323">need to build a can for them while experimenting with different motors.</span></div><div id="yui_3_16_0_1_1414777251498_3802" dir="ltr"><span>Alan</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_1414777251498_3808"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1414777251498_3807"> <div dir="ltr" id="yui_3_16_0_1_1414777251498_3806"> <hr size="1" id="yui_3_16_0_1_1414777251498_3805"> <font size="2" face="Arial" id="yui_3_16_0_1_1414777251498_3809"> <b id="yui_3_16_0_1_1414777251498_3819"><span style="font-weight:bold;" id="yui_3_16_0_1_1414777251498_3818">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, November 1, 2014 6:22 AM<br> <b id="yui_3_16_0_1_1414777251498_5702"><span style="font-weight: bold;" id="yui_3_16_0_1_1414777251498_5701">Subject:</span></b> Re: [PSUBS-MAILIST] Alan needs a motor<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1414777251498_3816"><br><br clear="none">I think there is a formula for compromise, the amount of compromise is the square root of how deep your pocket is in US funds multiplied by the limit on your credit card.<br clear="none">:-)<br clear="none">Hank--------------------------------------------<br clear="none">On Fri, 10/31/14, Brian Cox via Personal_Submersibles <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org" id="yui_3_16_0_1_1414777251498_3817">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">personal_submersibles@psubs.org</a>><br clear="none"> Received: Friday, October 31, 2014, 12:28 PM<br clear="none"> <br clear="none"> Alan, That is the peak<br clear="none"> hp, you wouldn't run it continuously at 15 hp, you may<br clear="none"> have to compromise ;) we all have to<br clear="none"> ! Brian<br clear="none"> <br clear="none"> --- <a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:<br clear="none"> <br clear="none"> From: Alan James 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"> Personal Submersibles General Discussion<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"> Subject: Re: [PSUBS-MAILIST] Alan needs a<br clear="none"> motor<br clear="none"> Date: Thu, 30 Oct 2014 23:39:51 +0000<br clear="none"> (UTC)<br clear="none"> <br clear="none"> Hi Brian,thanks. That one is 15hp & 8"<br clear="none"> diameter.The motor I do<br clear="none"> have is 2hp & 2" diameter but just<br clear="none"> revstoo fast. Hopefully I<br clear="none"> will find a solution that doesn't need a gear<br clear="none"> box.Alan<br clear="none"> <br clear="none"> From: Brian<br clear="none"> Cox via 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"> <br clear="none"> To: Personal<br clear="none"> Submersibles General Discussion<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"> <br clear="none"> Sent: Friday,<br clear="none"> October 31, 2014 12:25 PM<br clear="none"> Subject: Re:<br clear="none"> [PSUBS-MAILIST] Alan needs a motor<br clear="none"> <br clear="none"> <br clear="none"> What about this<br clear="none"> one? <a shape="rect" href="http://www.thunderstruck-ev.com/motenergy-me0909.html%C2%A0brian" target="_blank">http://www.thunderstruck-ev.com/motenergy-me0909.html brian</a><br clear="none"> <br clear="none"> ---<br clear="none"> <a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:<br clear="none"> <br clear="none"> From: Alan James via 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"> Personal Submersibles General Discussion<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"> Subject: Re: [PSUBS-MAILIST] Alan needs a<br clear="none"> motor<br clear="none"> Date: Thu, 30 Oct 2014 20:22:42 +0000<br clear="none"> (UTC)<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Thanks Hank &<br clear="none"> Graham.I am probably<br clear="none"> searching for Nirvana here.First I am set on finding a brushless motor<br clear="none"> solution.I spent multiple<br clear="none"> hours of Googling, focusing on E-bikes, scooters<br clear="none"> etc.The E-bikes are mainly<br clear="none"> hub motors that are narrow with a large diameter,<br clear="none"> whichis no good as far as<br clear="none"> drag is concerned, plus you need a big prop to get out<br clear="none"> beyondthe diameter of the<br clear="none"> motor. There are units with 5-1 gear box ratios at 48V<br clear="none"> 1500Wbut they can weigh<br clear="none"> around 14kg. I bought an 1850W Hobby King BLDC<br clear="none"> outrunnermotor for $56-<br clear="none"> & it weighs 530 grams. So more powerful & 1/27th the<br clear="none"> weight.This does 236 rpm<br clear="none"> per volt, & from what I've read you don't want<br clear="none"> 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 disipate the heat<br clear="none"> from the stationary inner coil of an outrunner, I may be<br clear="none"> forced togo with oil<br clear="none"> 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 maximum voltage to keep the revs<br clear="none"> down. Also I wouldn't be thrashing the<br clear="none"> motorwhich may help it<br clear="none"> 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.<br clear="none"> Hank I was given a motorized Golf trundler & converted<br clear="none"> it to a trike with ape hangersand pink banana seat for my girls. Boy did<br clear="none"> they love showing off on that.<br clear="none"> <br clear="none"> <br clear="none"> From: hank<br clear="none"> pronk via 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"> <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<br clear="none"> went on ebay and found a 1,000 watt 48v brushless motor with<br clear="none"> controller for 200 dollars. It is for an electric bike. <br clear="none"> I bought one for my son a few years back and it was<br clear="none"> amazing. He was driving it all over town and towing his<br clear="none"> buddy on his skate board. Just type in brushless 48 v<br clear="none"> motor.<br clear="none"> You won't need a gearbox<br clear="none"> 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"> _______________________________________________<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"> 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"> _______________________________________________<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"> -----Inline Attachment Follows-----<div class="qtdSeparateBR"><br><br></div><div class="yqt8913355003" id="yqtfd83352"><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><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>