<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div><span>Alan,</span></div><div dir="ltr"><span>You are right, the mechanical seal is the easiest way to go. My Perry thrusters had simple spring loaded seals with a sealed cavity behind the mechanical seal. You will be oil </span>filled, so the seal will have the back up oil.</div><div dir="ltr">Hank</div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Monday, October 3, 2016 1:27 PM, Alan via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv7709328506"><div><div>Hank,</div><div>yes I like the idea of going straight to the penetrator with the clear tube attaching</div><div>on to a barbed fitting. I want to put a 4psi overpressure in the system & are</div><div>intending to do this with compressed air; so need to tee in an air line. I also</div><div>need an oil filling point, however the air connection point could double for this.</div><div>I like the clear tube as it is a visual indication of the oil level.</div><div>I have 2 lip seals at the moment. Hugh wasn't too impressed with that idea</div><div>& thought I should go with a mechanical seal. From what I have read, the shaft</div><div>the lip seal runs on needs to be plunge ground to a certain finish, & a mechanical</div><div>seal would eliminate that precision process.</div><div>Also I look at what other large manufacturers have done & figure they have</div><div>done the research on seals & have the experience.</div><div>Cheers Alan</div><div><br clear="none">Sent from my iPad</div><div class="yiv7709328506yqt6792568565" id="yiv7709328506yqt49349"><div><br clear="none">On 4/10/2016, at 12:37 am, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"><div><span>Alan,</span></div><div><span>You can make up a pretty simple penetrator for the wires, or why not leave the wires the way they are in the clear tube and run the tube to a penetrator on the sub that is made from a barbed fitting. The clear tube can be oil filled and act as your compensator. I know you already though of this. I think the DW's work like that.</span></div><div>If you are oil filled, why the mechanical seal. Just go with a higher pressure rated lip seal.</div><div>Hank</div> <div class="yiv7709328506qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv7709328506yahoo_quoted" style="display:block;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr"><font size="2" face="Arial"> On Monday, October 3, 2016 3:40 AM, Alan via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv7709328506y_msg_container"><div id="yiv7709328506"><div><div>Hi Hank, thanks.</div><div>yes am intending on getting that type of seal, but I will try & get some advice</div><div>on an appropriate seal for the viscosity & type of oil I am using (Morlina S2 Bl 10).</div><div>Must be a bit barmy because I was getting quite excited about the new </div><div>compensating oil I bought. </div><div>I haven't quite decided how I am going to terminate the wires coming out of the </div><div>motor. At present I have the wires running through a clear hose up to a manifold.</div><div>I say manifold but it is a modified brass T plumbing fitting. The hose is hose clamped</div><div>to one end & the wires are silicone sealed coming out the other end. On the T I have</div><div>a plug that I can remove to fill the tube & thruster with oil. This is okay for experimental</div><div>purposes but will need to add pressure to the system & a through hull fitting</div><div>when I mount it on the sub.</div><div>Alan</div><div><br clear="none"><br clear="none">Sent from my iPad</div><div class="yiv7709328506yqt3544435197" id="yiv7709328506yqt30743"><div><br clear="none">On 3/10/2016, at 9:28 pm, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"><div id="yiv7709328506yui_3_16_0_ym19_1_1475458034925_22070"><span>Alan,</span></div><div dir="ltr" id="yiv7709328506yui_3_16_0_ym19_1_1475458034925_22069"><span id="yiv7709328506yui_3_16_0_ym19_1_1475458034925_22068">That is great! well done.. What type of mechanical seal will you use? Are you planning a spring loaded pump seal? </span></div><div dir="ltr" id="yiv7709328506yui_3_16_0_ym19_1_1475458034925_22069"><span>Hank </span></div> <div class="yiv7709328506qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv7709328506yahoo_quoted" style="display:block;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr"><font size="2" face="Arial"> On Monday, October 3, 2016 2:07 AM, Alan via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv7709328506y_msg_container">Just did a pool test of my latest brushless thruster.<br clear="none">This thruster uses a 60kv (revs per Volt) 6374 (dimensions in mm) brushless<br clear="none">sensored outrunner motor. The propeller was a 3 bladed 7&1/4" x 4" with no kort nozzle.<br clear="none">I was getting 30kg (66lb) thrust from 30 amps off 52 volts (1560W) with the thruster<br clear="none">oil filled. This seems comparable to what Cliff was getting from his Minnkota 101.<br clear="none">The difference is this is a much smaller unit. I have been keeping a file on<br clear="none">performance statistics of commercial thrusters & trolling motors & this is slightly <br clear="none">above average.<br clear="none">The manufacturer told me not to run the motor more than 40 amps continuosly,<br clear="none">so I am being conservative with the 30 amp draw. I could bump it up by putting<br clear="none">on a bigger prop.<br clear="none">Next step is to use it as a boat motor & notch up 100 or so hours, then build<br clear="none">another housing with a mechanical seal.<br clear="none">Added a couple of photos to the project page, but they loaded upside down for<br clear="none">some reason. Couldn't change them. <br clear="none"> <a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/projects/1235435392/brushlessthruster/">http://www.psubs.org/projects/1235435392/brushlessthruster/</a><br clear="none">Alan<br clear="none"><br clear="none">Sent from my iPad<br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"><br clear="none"><br clear="none"></div> </div> </div> </div></div></div></blockquote></div><blockquote type="cite"><div><span>_______________________________________________</span><br clear="none"><span>Personal_Submersibles mailing list</span><br clear="none"><span><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><br clear="none"><span><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br clear="none"></div></blockquote></div></div><br clear="none"><div class="yiv7709328506yqt3544435197" id="yiv7709328506yqt18729">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br clear="none"><br clear="none"></div> </div> </div> </div></div></div></blockquote></div><blockquote type="cite"><div><span>_______________________________________________</span><br clear="none"><span>Personal_Submersibles mailing list</span><br clear="none"><span><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><br clear="none"><span><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br clear="none"></div></blockquote></div></div><br><div class="yqt6792568565" id="yqt64504">_______________________________________________<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></div></body></html>