<html><body><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="yui_3_16_0_1_1414470128018_4824"><span>Ken,</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4286"><span id="yui_3_16_0_1_1414470128018_4285">haven't heard from you for a while.</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4280"><span id="yui_3_16_0_1_1414470128018_4279">I am trying to track down a suitable DC brushless motor around 1500W for a thruster.</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4282"><span id="yui_3_16_0_1_1414470128018_4281">Preferably I don't want to gear it down, so I need an output speed of less than 3000rpm.</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4283"><span id="yui_3_16_0_1_1414470128018_4284">The only brushless motors I can find with low rpm are the RC outrunner motors that</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4283"><span id="yui_3_16_0_1_1414470128018_4826">you might find at Hobby King. I am looking at playing round with a larger motor &</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4283"><span id="yui_3_16_0_1_1414470128018_4827">running it at 1/2 it's maximum voltage. They seem so small compared to their brushed</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4283"><span id="yui_3_16_0_1_1414470128018_5087">counterpart that I don't think I will be disadvantaged size wise by doing this.</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4283"><span id="yui_3_16_0_1_1414470128018_5088">Most of these motors seem to be low voltage, high amps, & I would prefer something operating</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4283"><span id="yui_3_16_0_1_1414470128018_5092">on around 48V. </span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4283"><span id="yui_3_16_0_1_1414470128018_5093">Any words of wisdom or product <span id="misspell-3" class=""><span id="yui_3_16_0_1_1414470128018_5669">recommendation</span></span> here thanks.</span></div><div dir="ltr" id="yui_3_16_0_1_1414470128018_4283"><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_1414470128018_4561"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1414470128018_4560"> <div dir="ltr" id="yui_3_16_0_1_1414470128018_4559"> <hr size="1" id="yui_3_16_0_1_1414470128018_5684"> <font size="2" face="Arial" id="yui_3_16_0_1_1414470128018_4558"> <b id="yui_3_16_0_1_1414470128018_5686"><span style="font-weight:bold;" id="yui_3_16_0_1_1414470128018_5685">From:</span></b> Ken Martindale 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> Monday, October 27, 2014 1:20 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] (no subject)<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1414470128018_5094"><br>Water is compressible, look how the submarine "Ben Franklin" did it. Water<br clear="none">is just not very compressible.<br clear="none"><br clear="none">Ken Martindale<br clear="none"><br clear="none">-----Original Message-----<br clear="none">From: Personal_Submersibles [mailto:<a shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" href="mailto:personal_submersibles-bounces@psubs.org" id="yui_3_16_0_1_1414470128018_5430">personal_submersibles-bounces@psubs.org</a>]<br clear="none">On Behalf Of Marc de Piolenc via Personal_Submersibles<br clear="none">Sent: Sunday, October 26, 2014 8:11 PM<br clear="none">To: <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] (no subject)<br clear="none"><br clear="none">Compressing water will be quite some trick.<br clear="none"><br clear="none">Marc<br clear="none"><br clear="none">Ducted fans: <a shape="rect" href="http://massflow.archivale.com/" target="_blank">http://massflow.archivale.com/ </a>Archivale catalog:<br clear="none"><a shape="rect" href="http://www.archivale.com/catalog" target="_blank">http://www.archivale.com/catalog </a>Polymath weblog:<br clear="none"><a shape="rect" href="http://www.archivale.com/weblog" target="_blank">http://www.archivale.com/weblog </a>Translations (ProZ profile):<br clear="none"><a shape="rect" href="http://www.proz.com/profile/639380" target="_blank">http://www.proz.com/profile/639380</a><br clear="none">Translations (BeWords profile): <a shape="rect" href="http://www.bewords.com/Marc-dePiolenc" target="_blank">http://www.bewords.com/Marc-dePiolenc</a><br clear="none"><br clear="none"><br clear="none">On 10/26/2014 11:06 PM, Graham Bayliss via Personal_Submersibles wrote:<br clear="none">><br clear="none">> Hi Hank<br clear="none">><br clear="none">> I agree a jet drive is the way to go did you not think that a jet ski <br clear="none">> drive was to small and would only drive a small craft. I intend to <br clear="none">> build a larger jet drive and compress the water. This will be easy and <br clear="none">> add power to the system the jet drive from a jet ski would not drive a <br clear="none">> sub but I am certain I can overcome the problems by building a larger jet<br clear="none">drive and a compressor.<br clear="none">> Thank you for your input and I will keep you informed as the project <br clear="none">> un folds.<br clear="none">><br clear="none">> Graham<br clear="none">><br clear="none">> -----Original Message-----<br clear="none">> From: Personal_Submersibles <br clear="none">> [mailto:<a shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>]<br clear="none">> On Behalf Of hank pronk via Personal_Submersibles<br clear="none">> Sent: 26 October 2014 12:42<br clear="none">> To: Personal Submersibles General Discussion<br clear="none">> Subject: Re: [PSUBS-MAILIST] (no subject)<br clear="none">><br clear="none">><br clear="none">> Graham,<br clear="none">> In the world of marine jet drive it is well known that jet drive takes <br clear="none">> two times the horse power to do the same job. Jet drive is well <br clear="none">> suited to a craft that needs a shallow draft. I think you will find <br clear="none">> it very complicated to control and it will be very inefficient. I have <br clear="none">> been down this road, I love the concept but abandoned it. If you go <br clear="none">> forward may I suggest you start with a jet drive. It is not a simple <br clear="none">> part to replicate. The impeller tolerances are critical. I have a <br clear="none">> jet unit on the shelf I could donate to your project. The jet is from <br clear="none">> a jet ski. I would consider a single rear motor on a full gimbal.<br clear="none">> Hank --------------------------------------------<br clear="none">> On Sun, 10/26/14, Graham Bayliss 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>> wrote:<br clear="none">><br clear="none">> Subject: [PSUBS-MAILIST] (no subject)<br clear="none">> To: "'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">> Received: Sunday, October 26, 2014, 7:39 AM<br clear="none">><br clear="none">> #yiv9417249292<br clear="none">> #yiv9417249292 --<br clear="none">><br clear="none">> _filtered #yiv9417249292 {panose-1:2 4 5 3 5 4 6 3 2 4;}<br clear="none">> _filtered #yiv9417249292 {font-family:Calibri;panose-1:2 15<br clear="none">> 5 2 2 2 4 3 2 4;}<br clear="none">> #yiv9417249292<br clear="none">> #yiv9417249292 p.yiv9417249292MsoNormal, #yiv9417249292 <br clear="none">> li.yiv9417249292MsoNormal, #yiv9417249292 div.yiv9417249292MsoNormal<br clear="none">> {margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;}<br clear="none">> #yiv9417249292 a:link, #yiv9417249292<br clear="none">> span.yiv9417249292MsoHyperlink<br clear="none">> {color:blue;text-decoration:underline;}<br clear="none">> #yiv9417249292 a:visited, #yiv9417249292 <br clear="none">> span.yiv9417249292MsoHyperlinkFollowed<br clear="none">> {color:purple;text-decoration:underline;}<br clear="none">> #yiv9417249292 span.yiv9417249292EmailStyle17<br clear="none">> {color:#1F497D;}<br clear="none">> #yiv9417249292 .yiv9417249292MsoChpDefault<br clear="none">> {}<br clear="none">> _filtered #yiv9417249292 {margin:72.0pt 72.0pt 72.0pt 72.0pt;}<br clear="none">> #yiv9417249292 div.yiv9417249292WordSection1<br clear="none">> {}<br clear="none">> #yiv9417249292 Hi I am near the end of my build of my k350 and have<br clear="none">> started to look at new designs I am interested in building a flyer <br clear="none">> sub and have come up with a design which will include a vectored <br clear="none">> motor drive this will enable my flyer to hover and stop where ever I <br clear="none">> want. I have designed a motor unit which will drive a fan type <br clear="none">> propeller as an intake this will force water to the rear of the unit<br clear="none">> where it is compressed then it is forced into ducting which will <br clear="none">> take the water to four nozzles on the side of the craft. The nozzles <br clear="none">> are able to turn three hundred and sixty degrees both side are <br clear="none">> independent of one another so rolls will be achievable. The reason <br clear="none">> for a vectored motor is you only need one motor source and one power <br clear="none">> pack this will ease the maintenance and increase the enjoyment of <br clear="none">> using your sub. I am interested in the clubs thought of this kind of <br clear="none">> design. Graham<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 class="qtdSeparateBR"><br><br></div><div class="yqt9445535369" id="yqtfd15346"><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"></div><br><br></div> </div> </div> </div></body></html>