<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>I doubt it is the bearing running out of oil that will make it start </span>weird. I assume you have open bearings, they are pretty tough. Do you have the prop on the motor for this test? Id does sound like something is getting hot and needs to cool a bit. You may have to pull the motor apart and look for rub marks. Is the motor still quiet for the whole test? When you stop and start it, does the oil in the wire tube jump? could the wires be under sized given the motor is oil filled now?</div><div dir="ltr">Hmm this will be fun to solve</div><div dir="ltr" id="yui_3_16_0_ym19_1_1481548477486_6094">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 Sunday, December 11, 2016 10:34 PM, Alan James via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv4316095101"><div><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="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2598"><span id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2981">Hank,<br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2969">I ran it for 7 hours today, & the outside of the thruster was not hot.<br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2970">Although I have suspicions that either the bearings or lip seals are<br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2971">getting a bit hot. When I stopped & started it, it was starting roughly at times.<br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2972">If I left it a minute it would start smoothly. It was like something was seizing slightly.<br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2973"> Yes, I think if the oil was kept in with the hose wrap it wouldn't have happened. I <br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2974">guess that is one positive for it!<br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2975"> My motor comes with a heat sensor on it's hall sensor board, but haven't got the<br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2976">electronics to read it yet. <br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2977"> The next thruster version will have the mechanical seal, & I will pressurize the oil.<br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2978">My little motors need the oil for cooling as they are a lot more heat sensitive <br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2979">than the Minn Kotta's that are built big to run in air & withstand heat.<br clear="none" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2980">Alan</span></div><div class="yiv4316095101qtdSeparateBR" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2733"><br clear="none"><br clear="none"></div><div class="yiv4316095101yahoo_quoted" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2738" style="display:block;"> <div id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2737" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2736" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv4316095101yqt9467299435" id="yiv4316095101yqt29345"><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2735"> <font id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2734" face="Arial" size="2"> </font><hr id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2782" size="1"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Monday, December 12, 2016 12:46 PM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Motor modification<br clear="none"> </div> <div class="yiv4316095101y_msg_container" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2788"><br clear="none"><div id="yiv4316095101"><div id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2787"><div id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2786" style="color:rgb(0, 0, 0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;background-color:rgb(255, 255, 255);"><div id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_4019"><span>Alan,</span></div><div id="yiv4316095101yui_3_16_0_ym19_1_1481499739368_3918">Are you checking temperature of the oil in the motor. I think also if your worried about your bearings running out of oil, then there is an argument to use a hose for compensating rather than a bladder. The hose would restrict oil leaving the motor housing. I have a feeling in the cold lakes of BC there is a negligible amount of oil expansion due to heat. I still like the bladder as the better option.</div><div id="yiv4316095101yui_3_16_0_ym19_1_1481499739368_3918">Hank</div> <div class="yiv4316095101qtdSeparateBR" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_4063"><br clear="none"><br clear="none"></div><div class="yiv4316095101yahoo_quoted" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2785" style="display:block;"> <div id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2784" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"> <div id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2783" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv4316095101yqt1893319635" id="yiv4316095101yqt11824"><div dir="ltr"><font face="Arial" size="2"> On Sunday, December 11, 2016 2:47 PM, Alan James via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv4316095101y_msg_container" id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2791"><div id="yiv4316095101"><div id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2790"><div id="yiv4316095101yui_3_16_0_ym19_1_1481512048313_2789" style="color:rgb(0, 0, 0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;background-color:rgb(255, 255, 255);"><div id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2895"><span>Rick & all,</span></div><div id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2894"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2893">I have my thruster running in a swimming pool at the moment.</span></div><div><span>I have it oil filled with the oil continuing up the wiring tube.</span></div><div id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3060"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3059">I made a note of the oil level in the tube before running, then noted</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3065"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3082">the level had risen by a few inches while the motor was running.</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3160"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3159">Obviously the centrifugal force of the motor is pushing the oil out.</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3234"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3233"> This is probably not a problem at depth where the water pressure</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3246"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3324">acting on the bladder would stop that happening. But while running on the</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3323"><span>surface it would keep oil away from bearings & the rotary shaft seal.</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3468"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3467"> Although I am using lip seals at the moment, I will be using mechanical</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3466"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3465">seals in the next version, & it will be important to keep oil on the seal</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3670"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3677">faces. This makes a good case for a compensator with over-pressure,</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3693"><span id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3712">to counteract this.</span></div><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3724"><span>Cheers Alan</span></div><div class="yiv4316095101qtdSeparateBR" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2822"><br clear="none"><br clear="none"></div><div class="yiv4316095101yahoo_quoted" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2856" style="display:block;"> <div id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2855" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2854" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2853"> <font id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2857" face="Arial" size="2"> </font><div class="yiv4316095101yqt3413621142" id="yiv4316095101yqtfd73484"><hr id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_3485" size="1"> <b><span style="font-weight:bold;">From:</span></b> Rick Patton via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Monday, December 12, 2016 7:12 AM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Motor modification<br clear="none"> </div></div><div class="yiv4316095101yqt3413621142" id="yiv4316095101yqtfd23125"> <div class="yiv4316095101y_msg_container" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2877"><br clear="none"><div id="yiv4316095101"><div id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2879"><div dir="ltr" id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2878">Alan,<div id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2880"><br clear="none"></div><div id="yiv4316095101yui_3_16_0_ym19_1_1481491645957_2881">OK, then it sounds like a semi filled flexible oil bladder is the best way to go. It is more unsightly and needs to be secured somehow so it doesn't flop around while under-weigh compared to the coiled tube idea but bottom line is what works the best. I didn't realize that there were two 0 rings in the Minn-Kota motors until just recently when this thread started and I agree that that void should be filled with liquid so will look into the feasibility of that.</div><div> </div><div>We have two mountains here on the big Island that top out just under 14,000 feet and they usually get snow on the tops every year. There is one on Maui as well but usually doesn't get as much. It's funny to see some people drive up there and fill their pick ups with it and drive back down to their house at sea level and shovel it into there yard for the day!</div><div><br clear="none"></div><div>Rick</div></div><div class="yiv4316095101gmail_extra"><br clear="none"><div class="yiv4316095101gmail_quote">On Sat, Dec 10, 2016 at 5:45 PM, Alan James 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="yiv4316095101gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204, 204, 204);border-left-width:1px;border-left-style:solid;"><div class="yiv4316095101yqt8134460101" id="yiv4316095101yqt22971"><div><div style="color:rgb(0, 0, 0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;background-color:rgb(255, 255, 255);"><div dir="ltr" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4614"><span id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4787">Rick,<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4764">I think the problem with the tube is not so much that it won't allow for expansion,<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4765">but that it won't collapse under pressure before water can leak past your seal.<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4766"> Karl Stanley told me he air compensated his thrusters on Idabel (that goes to 2000ft)<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4767">with a first stage regulator with spring removed to give ambient pressure. When I asked <br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4768">him how the expanding air escaped on ascent he told me it just blew out past the seal.<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4769"> I wouldn't do that as it could destroy the seal, but it demonstrates what you can<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4770">get away with. Vance pulled Karl's motors apart & said there was a bit of water in them,<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4771">but that it could have been from condensation of water from the several atmospheres of air<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4772">that would be compressed in there.<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4773"> Alec used the tube wrap system on Snoopy as did other Psubbers. I believe he<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4774">did get water in, in the latter stages.<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4775"> There is a gap between the two seals in the Minn kota 101 & one of them will fail<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4776">if you take it deep enough. So you will end up with either oil or water in the gap.<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4777">If you regard the outer seal as sacrificial & just there to stop sand & crud damaging<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4778">the inner seal, then I guess it's not a big deal. Vance has said he regards the 101<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4779">as a disposable unit. I think the cheapest purpose built thrusters start around $4000-<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4780"> Best as Sean says, to have an expansion / compensation bag. Better to add some <br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4781">pressure to it so that oil is more likely to flow out than water flow in. Microscopic<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4782">spiral lines on the shaft from machining can pump water in or oil out.<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4783"> I have built an oil filled brushless thruster that I am pool testing at the moment. <br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4784">A bit of work to go on it yet, but it's looking promising.<br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4785"> Snow in Hawaii??? <br clear="none" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4786">Alan</span></div><div class="yiv4316095101m_8858087769834762953qtdSeparateBR" id="yiv4316095101m_8858087769834762953yui_3_16_0_ym19_1_1481423926071_4615"><br clear="none"><br clear="none"></div><div class="yiv4316095101m_8858087769834762953yahoo_quoted" style="display:block;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr"> <font face="Arial" size="2"><span class="yiv4316095101"> </span></font><hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Rick Patton 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>><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <<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"> <b><span style="font-weight:bold;">Sent:</span></b> Sunday, December 11, 2016 7:42 AM<span class="yiv4316095101"><br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Motor modification<br clear="none"> </span> </div> <div class="yiv4316095101m_8858087769834762953y_msg_container"><br clear="none"><div id="yiv4316095101m_8858087769834762953yiv6429806605"><div><div><div class="yiv4316095101h5"><div dir="ltr">Hey Alan,<div><br clear="none"></div><div>Been tied up for a couple days since this post but thanks for the heat/expansion/volume data as it makes it much easier to comprehend. Based on what I see here, is it safe to assume that due to the amount of expansion of oil, just wrapping the motor several times with the clear PVC hose and connecting the other end to the second barbed fitting on the motor would not work due to the fact that the hose would not expand enough to allow for the volume of expanded oil where as a bladder half filled would work better? </div><div>Also would like to hear from the others out there who have used only the clear hose to see if they have had any issues with leakage? </div><div><br clear="none"></div><div>Thanks all</div><div>Rick</div></div></div></div><div class="yiv4316095101m_8858087769834762953yiv6429806605gmail_extra"><br clear="none"><div class="yiv4316095101m_8858087769834762953yiv6429806605gmail_quote"><div><div class="yiv4316095101h5">On Wed, Dec 7, 2016 at 1:42 PM, Alan James 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"></div></div><blockquote class="yiv4316095101m_8858087769834762953yiv6429806605gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204, 204, 204);border-left-width:1px;border-left-style:solid;"><div class="yiv4316095101m_8858087769834762953yiv6429806605yqt2743966208" id="yiv4316095101m_8858087769834762953yiv6429806605yqt44397"><div><div style="color:rgb(0, 0, 0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;background-color:rgb(255, 255, 255);"><div><div class="yiv4316095101h5"><div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3647"><span>Rick,</span></div><div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3542"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3624">Sean's beat me to it, but I'll add that you can usually look up</span></div><div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3683"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3682">your compensating oil's coefficient of thermal expansion, &</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4726"><span>calculate how much it will be. Engine oil is about .0007. That</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4064"><span>would mean that if you had a liter of oil (1000cc) & the temperature</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3886"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3885">went up by 50 degrees C, then the oil would expand another 35cc.</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3887"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3952">Not a lot given that you would not require a lot of oil in the thruster.</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4050"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4049">Getting the air out could be a bigger problem & it would expand more.</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4078"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4118">In a declassified military document on compensating I read , it talks</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4152"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4153">about & demonstrates how to pull a vacuum on a thruster to get all</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4349"><span>the air out.</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4350"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4352">Another issue that I mentioned earlier is that all seals leak oil to</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4351"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4725">lubricate themselves, so having a reservoir makes sense.</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4596"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4595">What I am doing is enclosing my motor wiring in a hose & filling</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4598"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4597">the motor & hose with oil. In to this I will have a T to a relieving regulator</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4651"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4650">(PR 364) that will pressurize the system with air at 4psi above ambient.</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4646"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4645">Carsten & Emile had all sorts of problems about oil expanding & leaking</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4675"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4677">then c</span><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4666">ontracting & sucking in water. Will re post their emails if I</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4760"><span>can find them.</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_4761"><span>Regards Alan</span></div><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180qtdSeparateBR" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3276"><br clear="none"><br clear="none"></div></div></div><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yahoo_quoted" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3895" style="display:block;"> <div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3894" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3893" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3892"> <font id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3891" face="Arial" size="2"> </font><hr id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yui_3_16_0_ym19_1_1481150371057_3890" size="1"> <b><span style="font-weight:bold;">From:</span></b> Rick Patton 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>><span class="yiv4316095101"><span class="yiv4316095101m_8858087769834762953yiv6429806605"><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <<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"> </span></span><span class="yiv4316095101"><b><span style="font-weight:bold;">Sent:</span></b> Thursday, December 8, 2016 10:38 AM<span class="yiv4316095101m_8858087769834762953yiv6429806605"><br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Motor modification<br clear="none"> </span> </span></div> <div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180y_msg_container"><br clear="none"><div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223"><div><span class="yiv4316095101"></span><div><div class="yiv4316095101m_8858087769834762953yiv6429806605h5"><div dir="ltr">Alan,<div><br clear="none"></div><div>I am embarrassed to say that I am still not getting this concept. You mentioned in your email about the clear hose that people wrap around there Minn-Kota motors and mention about collapse pressure and also mention about lighting systems. Maybe we are talking about two separate things? </div><div>My question was based on wondering about that same clear tubing that wraps around the motor pods to allow for when the oil gets hot from use and expands.</div><div>Taking any air out of the equation, I got the impression that you could completely fill a motor with dielectric oil (or any liquid for that matter) and then take it to any depth and since you basically can't compress a liquid, there would be no water ingress to the motor (except for the small space between the two prop shaft 0 rings.) So now when you add a slight internal increase in pressure from the oil being heated from use, people use the clear tubing that wraps around the outside of the motor (which is also 100% filled with the same oil) as a place for the oil to go to expand rather that spitting out the prop shaft 0 rings. Am I correct so far?</div><div>So my question was, the clear hose wall must be flexible enough to allow for expansion before placing enough pressure on the prop shaft 0 ring to dislodge? And then if you don't get all the air out of the motor or clear hose or bladder, don't you have the water pressure trying to compress that bubble from not only the bladder or tube but past the shaft 0 ring as well? </div><div><br clear="none"></div><div>Rick</div><div><br clear="none"></div></div></div></div><div><div class="yiv4316095101h5"><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223gmail_extra"><br clear="none"><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223gmail_quote"><div><div class="yiv4316095101m_8858087769834762953yiv6429806605h5">On Mon, Dec 5, 2016 at 11:03 AM, Alan James 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"></div></div><blockquote class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204, 204, 204);border-left-width:1px;border-left-style:solid;"><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223yqt8596837554" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223yqt39209"><div><div style="color:rgb(0, 0, 0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;background-color:rgb(255, 255, 255);"><div><div class="yiv4316095101m_8858087769834762953yiv6429806605h5"><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6107"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6147">Some compensating thoughts.<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6131">On James Cameron's sub they used IV drip bags. I am not sure what they were compensating.<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6132">These come with various means of hose attachment.<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6133"> With regard to the wrap around hose method; I did some calculations on a standard pvc hose, & surprisingly<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6134">the colapse pressure was around 100psi. I am sure one of Nuytco's technicians told me they crimped the hose <br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6135">that was compensating their lights, to initiate the collapse of the hose for compensation.<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6136"> The industry standard for thrusters seems to be around 4psi internal overpressure,<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6137">but the compensators they use for this are relatively expensive. Hugh came up with<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6138">the novel idea of using a releiving regulator set at 4psi (Parker PR364). Cliff is using this.<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6139">This could be used for air or oil compensation.<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6140"> The seals need oil for lubrication, & I have read that they can use about a teaspoon a day. Based<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6141">on that I would have some sort of reservoir.<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6142"> Depending on the motor it may be tricky to get all the air out. If you have a bearing in a bore<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6143">followed by a seal, the air / oil would have to move through the bearing which may be a sealed type<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6144">or packed with grease. The Minn kotta diagrams I have seen show 2 seals; so how do you get oil or<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6145">ambient pressure between those? One will fail when you exceed it's pressure limit.<br clear="none" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6146">Alan</span></div><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293qtdSeparateBR" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6102"><br clear="none"><br clear="none"></div></div></div><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yahoo_quoted" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_5976" style="display:block;"> <div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_5975" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_5974" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div><div class="yiv4316095101m_8858087769834762953yiv6429806605h5"> <div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_5973"> <font id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6101" face="Arial" size="2"> </font><hr size="1"> <b><span style="font-weight:bold;">From:</span></b> James Frankland 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>><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <<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"> <b><span style="font-weight:bold;">Sent:</span></b> Tuesday, December 6, 2016 4:44 AM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Motor modification<br clear="none"> </div> </div></div><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293y_msg_container" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_5977"><br clear="none"><div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751"><div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6100"><div><div class="yiv4316095101m_8858087769834762953yiv6429806605h5"><span class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223"></span><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6099"><div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yui_3_16_0_ym19_1_1480960841168_6098">Hi Antoine\Hank.</div><div><br clear="none">Thanks guys. drinking bladder looks good. I was thinking of a furniture lift bag, which is very similar. I use a hot water bottle for the aft motor.</div><div> </div><div>Hank, what do you use for a bladder?</div><div> </div><div>Thanks</div><div>James </div></div></div></div><div><div class="yiv4316095101m_8858087769834762953yiv6429806605h5"><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751gmail_extra"><br clear="none"><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751gmail_quote"><span class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223">On 5 December 2016 at 13:18, 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"></span><blockquote class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204, 204, 204);border-left-width:1px;border-left-style:solid;"><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751yqt2460043082" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751yqt59240"><div><div style="color:rgb(0, 0, 0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;background-color:rgb(255, 255, 255);"><span class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223"></span><div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380yui_3_16_0_ym19_1_1480943301489_15335"><span>James,</span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380yui_3_16_0_ym19_1_1480943301489_15335"><span id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380yui_3_16_0_ym19_1_1480943301489_15775">I put my fill plug under the prop, in the flat end cap, and it works like a dream. </span></div><div dir="ltr" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380yui_3_16_0_ym19_1_1480943301489_15335"><span>Hank</span></div> <div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380yahoo_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;"><span class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223"></span><div><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751h5"> <div dir="ltr"><font face="Arial" size="2"> On Monday, December 5, 2016 5:37 AM, Antoine Delafargue 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></div><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380y_msg_container"><div><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751h5"><div id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380yiv6057255083"><div><span class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223">Hi frank</span><div>I have done something like that for my prop shaft seal oil filled compartment. But first i removed the hose and filled with a serynge with long steel needle. Then put the tube and filled it with the serynge. </div><div>The tube is flexible and transparent, from endurance sport platypus drinking bladder<br clear="none">Works well</div><div>Regards </div><div>Antoine <span class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223"><br clear="none">On Monday, December 5, 2016, James Frankland 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"></span><div class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380yiv6057255083yqt4043277881" id="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380yiv6057255083yqt98767"><blockquote class="yiv4316095101m_8858087769834762953yiv6429806605m_3427917828620748180yiv4867430223m_-6973932285791176293yiv8070633751m_-6973601674998661380yiv6057255083gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204, 204, 204);border-left-width:1px;border-left-style:solid;"><div dir="ltr"><div>Hi All</div><div> </div><div>I have been talking to Rick about motor compensation which has got me thinking.</div><div> </div><div>I originally did my motors like other psubbers have done with the rubber tubes around the sides, but have found them a real pain to fill. Problem is the location of the tube, plus the tiny bit of protruding pipe nipple on the inside.</div><div> </div><div>So, I modified the motors by drilling a hole in the top part of the aluminium endcap and use that now as the vent\final fill. Its better, but still awkward.</div><div> </div><div>I have suggested to Rick this idea, which I am tempted to adopt myself. Blocking off the existing side mounted pipe nipples and filling\venting\compensating all from the one top hole. There would be a rubber bulb of some sort on the end of the pipe. 2x pictures show filling and operation. Appologies for rubbish drawings, im at work.</div><div> </div><div>What does everyone think?</div><div> </div><div><img width="535" height="397" src="cid:IKSnSeNJDPdn7i1BCGww"></div><div><img width="535" height="380" src="cid:ONR05l1VdGCri46iluvf"><br clear="none"><br clear="none"></div></div>
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