<html><head></head><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_ym19_1_1480960841168_6107" dir="ltr"><span id="yui_3_16_0_ym19_1_1480960841168_6147">Some compensating thoughts.<br id="yui_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 id="yui_3_16_0_ym19_1_1480960841168_6132">These come with various means of hose attachment.<br id="yui_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 id="yui_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 id="yui_3_16_0_ym19_1_1480960841168_6135">that was compensating their lights, to initiate the collapse of the hose for compensation.<br id="yui_3_16_0_ym19_1_1480960841168_6136"> The industry standard for thrusters seems to be around 4psi internal overpressure,<br id="yui_3_16_0_ym19_1_1480960841168_6137">but the compensators they use for this are relatively expensive. Hugh came up with<br id="yui_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 id="yui_3_16_0_ym19_1_1480960841168_6139">This could be used for air or oil compensation.<br id="yui_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 id="yui_3_16_0_ym19_1_1480960841168_6141">on that I would have some sort of reservoir.<br id="yui_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 id="yui_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 id="yui_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 id="yui_3_16_0_ym19_1_1480960841168_6145">ambient pressure between those? One will fail when you exceed it's pressure limit.<br id="yui_3_16_0_ym19_1_1480960841168_6146">Alan</span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1480960841168_6102"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1480960841168_5976" style="display: block;"> <div id="yui_3_16_0_ym19_1_1480960841168_5975" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1480960841168_5974" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1480960841168_5973" dir="ltr"> <font id="yui_3_16_0_ym19_1_1480960841168_6101" face="Arial" size="2"> <hr size="1"> <b><span style="font-weight: bold;">From:</span></b> James Frankland 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> Tuesday, December 6, 2016 4:44 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Motor modification<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1480960841168_5977"><br><div id="yiv8070633751"><div id="yui_3_16_0_ym19_1_1480960841168_6100"><div id="yui_3_16_0_ym19_1_1480960841168_6099" dir="ltr"><div id="yui_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 class="yiv8070633751gmail_extra"><br clear="none"><div class="yiv8070633751gmail_quote">On 5 December 2016 at 13:18, hank pronk via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br clear="none"><blockquote class="yiv8070633751gmail_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="yiv8070633751yqt2460043082" id="yiv8070633751yqt59240"><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);"><div id="yiv8070633751m_-6973601674998661380yui_3_16_0_ym19_1_1480943301489_15335"><span>James,</span></div><div id="yiv8070633751m_-6973601674998661380yui_3_16_0_ym19_1_1480943301489_15335" dir="ltr"><span id="yiv8070633751m_-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 id="yiv8070633751m_-6973601674998661380yui_3_16_0_ym19_1_1480943301489_15335" dir="ltr"><span>Hank</span></div> <div class="yiv8070633751m_-6973601674998661380qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv8070633751m_-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;"><div><div class="yiv8070633751h5"> <div dir="ltr"><font face="Arial" size="2"> On Monday, December 5, 2016 5:37 AM, Antoine Delafargue via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="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="yiv8070633751m_-6973601674998661380y_msg_container"><div><div class="yiv8070633751h5"><div id="yiv8070633751m_-6973601674998661380yiv6057255083"><div>Hi frank<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 <br clear="none">On Monday, December 5, 2016, James Frankland via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br clear="none"><div class="yiv8070633751m_-6973601674998661380yiv6057255083yqt4043277881" id="yiv8070633751m_-6973601674998661380yiv6057255083yqt98767"><blockquote class="yiv8070633751m_-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:I7HKamCnCIsgLUc4PerP" data-id="4c5a83ea-01c1-9bed-5eb2-d41594db4a9a"></div><div><img width="535" height="380" src="cid:BTnbmH33Be66QcCgd7dc" data-id="f811c7a7-88bd-de29-7dd2-d29902e9272a"><br clear="none"><br clear="none"></div></div>
</blockquote></div></div></div></div><br clear="none"></div></div><div class="yiv8070633751m_-6973601674998661380yqt4043277881" id="yiv8070633751m_-6973601674998661380yqt42089">______________________________ _________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs. org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">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></div><br clear="none">______________________________ _________________<br clear="none">
Personal_Submersibles mailing list<br clear="none">
<a href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs. org</a><br clear="none">
<a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">http://www.psubs.org/mailman/ listinfo.cgi/personal_ submersibles</a><br clear="none">
<br clear="none"></blockquote></div><br clear="none"></div></div></div><br><div class="yqt2460043082" id="yqt56861">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>