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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Alan, try bow thruster propellers. They are designed for working at low water speeds and in tubes.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-NZ style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br><b>Sent:</b> Thursday, 4 December 2014 7:20 p.m.<br><b>To:</b> Personal Submersibles General Discussion<br><b>Subject:</b> Re: [PSUBS-MAILIST] Propeller<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div id="yui_3_16_0_1_1417673370312_2658"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Thanks Marc that's helpful.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1417673370312_2658"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>I could find that the 4" pitch may work well in the kort nozzle then.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1417673370312_2658"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Alan<o:p></o:p></span></p></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p><div id="yui_3_16_0_1_1417673370312_2655"><div id="yui_3_16_0_1_1417673370312_2654"><div id="yui_3_16_0_1_1417673370312_2653"><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='background:white'><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> Marc de Piolenc via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br><b>To:</b> <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> <br><b>Sent:</b> Thursday, December 4, 2014 5:47 PM<br><b>Subject:</b> Re: [PSUBS-MAILIST] Propeller</span><span style='font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1417673370312_2656"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><br>With an accelerating nozzle (designed to enhance mass flow and thrust), <br>you need coarser pitch for the same rpm. With a decelerating nozzle <br>(designed to suppress cavitation), speed through the rotor plane is <br>lower so finer pitch is needed.<br><br>Marc<br><br>On 12/4/2014 5:24 AM, Alan James via Personal_Submersibles wrote:<br>> I put some specs through an online propeller calculator,<br>> & I am told I need a 6" prop with a 3" pitch to match my 2 hp motor that<br>> revs at 3000rpm.<br>> I checked on other calculators & they also indicate around this size &<br>> pitch.<br>> With a kort nozzle there would be more load on the motor so maybe an<br>> even smaller propeller<br>> or pitch is required.<br>> Best I can find is a Yamaha 2hp 7&1/4" plastic prop with 4" pitch.<br>> I am wanting to experiment with a few props around this size & will<br>> probably reduce their<br>> diameter to see what effect it has.<br>> Any suggestions for an off the shelf prop that might be suitable, or advice?<br>> Alan<br>><br>><br>> _______________________________________________<br>> Personal_Submersibles mailing list<br>> <a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br>> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br>><br><br>-- <br>Archivale catalog: <a href="http://www.archivale.com/catalog" target="_blank">http://www.archivale.com/catalog</a><br>Polymath weblog: <a href="http://www.archivale.com/weblog" target="_blank">http://www.archivale.com/weblog</a><br>Translations (ProZ profile): <a href="http://www.proz.com/profile/639380" target="_blank">http://www.proz.com/profile/639380</a><br>Translations (BeWords profile): <a href="http://www.bewords.com/Marc-dePiolenc" target="_blank">http://www.bewords.com/Marc-dePiolenc</a><br>Ducted fans: <a href="http://massflow.archivale.com/" target="_blank">http://massflow.archivale.com/</a><o:p></o:p></span></p><div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id=yqtfd57065><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div></div></div></div><p class=MsoNormal><br><br>__________ Information from ESET NOD32 Antivirus, version of virus signature database 10823 (20141204) __________<br><br>The message was checked by ESET NOD32 Antivirus.<br><br><a href="http://www.eset.com">http://www.eset.com</a><br><br><br>__________ Information from ESET NOD32 Antivirus, version of virus signature database 10826 (20141204) __________<br><br>The message was checked by ESET NOD32 Antivirus.<br><br><a href="http://www.eset.com">http://www.eset.com</a><o:p></o:p></p></div> <BR><BR>__________ Information from ESET NOD32 Antivirus, version of virus signature database 10826 (20141204) __________<BR><BR>The message was checked by ESET NOD32 Antivirus.<BR><BR><A HREF="http://www.eset.com">http://www.eset.com</A><BR> </body></html>