<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_1437767567282_51065"><span>Glen,</span></div><div id="yui_3_16_0_1_1437767567282_51065"><span>I am just about to get back in to a project using an</span></div><div id="yui_3_16_0_1_1437767567282_51065"><span id="yui_3_16_0_1_1437767567282_51360">RC BLDC motor as a thruster. Have a 3 hp one with</span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_51358">a lot of starting torque that spins a Yamaha 4 hp prop</span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span>without gearing. </span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_51302">With regard to your pump; you will either need a suitable</span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_51279">electronic speed controller with reverse, or </span>you could build an H bridge</div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_51607">circuit on the appopriate 2 of the 3 wires from the speed controller</span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_51609">to the BLDC motor. There are normally 3 wires from the controller to<br></span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_51755">the motor, the central one is for position feedback & the other two can be </span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_51764">switched around happily for reversing the polarity.</span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_51869">You will need some sort of delay so you are not wacking it in to reverse</span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_51964">while it's still rotating.</span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_52020">Ken is an expert on this.</span></div><div id="yui_3_16_0_1_1437767567282_51065" dir="ltr"><span id="yui_3_16_0_1_1437767567282_52024">Hank had some great low priced DC pumps that he posted links to a while back.</span></div><div id="yui_3_16_0_1_1437767567282_51065" 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_1437767567282_51308"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1437767567282_51307"> <div dir="ltr" id="yui_3_16_0_1_1437767567282_51306"> <hr size="1" id="yui_3_16_0_1_1437767567282_51314"> <font size="2" face="Arial" id="yui_3_16_0_1_1437767567282_51310"> <b id="yui_3_16_0_1_1437767567282_51967"><span style="font-weight:bold;" id="yui_3_16_0_1_1437767567282_51966">From:</span></b> glen brown via Personal_Submersibles <personal_submersibles@psubs.org><br> <b id="yui_3_16_0_1_1437767567282_51762"><span style="font-weight: bold;" id="yui_3_16_0_1_1437767567282_51761">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, July 25, 2015 2:55 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] pump motor<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1437767567282_51312"><br><div id="yiv9100644170"><div id="yui_3_16_0_1_1437767567282_51510"><div dir="ltr" id="yui_3_16_0_1_1437767567282_51515">Hank<div id="yui_3_16_0_1_1437767567282_51521">I think using a set in either direction could work, the motor is not that long . Another option could be be rotating 180 deg.</div><div id="yui_3_16_0_1_1437767567282_51519">With all the issues that the trolling motors have I think its something I'm going to have to look into plus our dollar exchange rate is at 13 to 1 at present.I wonder what size and pitch prop one would use?</div><div id="yui_3_16_0_1_1437767567282_51517">Glen</div><div id="yui_3_16_0_1_1437767567282_51514"><br clear="none"></div></div><div class="qtdSeparateBR"><br><br></div><div class="yiv9100644170yqt5680017516" id="yiv9100644170yqt94928"><div class="yiv9100644170gmail_extra" id="yui_3_16_0_1_1437767567282_51509"><br clear="none"><div class="yiv9100644170gmail_quote" id="yui_3_16_0_1_1437767567282_51508">On Fri, Jul 24, 2015 at 4:33 PM, hank pronk via Personal_Submersibles <span dir="ltr"><<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> wrote:<br clear="none"><blockquote class="yiv9100644170gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;" id="yui_3_16_0_1_1437767567282_51507">Glen,<br clear="none">
I looked at it real hard, the motors are well compensated with a rubber bladder at the bottom. They are also sleek and made from SS. The problem is, they are not reversible, as far as I could figure. Maybe someone knows a way to reverse them. If you can find a way to reverse them, please let me know. I would use them in a flash!<br clear="none">
Hank<br clear="none">
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