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<div>Brian,</div><div>Your right Gamma sits in a cool shop and dives in cold water. With your big motors, pick up an air bag from the wreckers. Fill the bag half way or less with WD40 and squeeze the bag until the oil starts to come out the top. Then get your wife to attach the vent tube to the bag. Avoid air being trapped as much as possible. A bit of air won't hurt anything. Then mount the bag out of the way and forget about it. Bye the way, Deep Workers have air bags on them from trucks.</div><div>Hank</div><div><br></div>
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On Monday, June 3, 2019, 10:01:23 PM MDT, Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="yiv2998451965"><div><div style="font-family:Arial, sans-serif;font-size:10pt;"><font size="2">Hmm, yes you're right.</font><br clear="none"><br clear="none"><span style="font-size:10pt;">--- personal_submersibles@psubs.org wrote:</span><br clear="none"><br clear="none"><span style="font-size:10pt;">From: Alan via Personal_Submersibles <personal_submersibles@psubs.org></span><br clear="none"><span style="font-size:10pt;">To: Personal Submersibles General Discussion <personal_submersibles@psubs.org></span><br clear="none"><span style="font-size:10pt;">Subject: Re: [PSUBS-MAILIST] Oil expansion</span><br clear="none"><span style="font-size:10pt;">Date: Tue, 4 Jun 2019 15:55:54 +1200</span><br clear="none"><br clear="none"><div style="font-size:10pt;"></div><div style="font-size:10pt;">Brian,</div><div style="font-size:10pt;">what I meant by added weight was that when the air is compressed it is</div><div style="font-size:10pt;">replaced by water making the sub heavier. It won't be much.</div><div style="font-size:10pt;">Of concern is that there will be air in the thruster that you won't be able</div><div style="font-size:10pt;">to get out & you may not be able to account for it in your calculations.</div><div style="font-size:10pt;">If you get it wrong & get water in through the tube, it will keep coming</div><div style="font-size:10pt;">in (being heavier than oil) until it has replaced all your oil! </div><div style="font-size:10pt;">It will kill your motor. I have stuffed up a lot of electronics & batteries of late </div><div style="font-size:10pt;">with sea water. </div><div style="font-size:10pt;">Alan</div><div class="yiv2998451965yqt7098953926" id="yiv2998451965yqt73894"><div style="font-size:10pt;"><br clear="none">On 4/06/2019, at 3:06 PM, Brian Cox 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 style="font-size:10pt;"><div><div style="font-family:Arial, sans-serif;font-size:10pt;"><font size="2">Alan,</font><div><font size="2"> The motor is outside the sub so I don't think there would be any added weight .</font></div><div><font size="2"><br clear="none"></font></div><div><font size="2">Once the motor with the wd40 heated up to it's maximum temp ( in my yard) then that would be the base line quantity of oil. I would let it bleed out to the top of the ridge of the tube and spill out. Then it would contract and I would just have to make sure the water going up the tube would not travel up as far as the top point of the tube where it heads back down to the motor. </font></div><div><font size="2"><br clear="none"></font></div><div><font size="2">Brian</font></div><div><font size="2"><br clear="none"></font></div><div><font size="2"><br clear="none"></font></div><div><font size="2"><br clear="none"></font></div><div><font size="2"><br clear="none"></font><br clear="none"><span style="font-size:10pt;">--- <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:</span><br clear="none"><br clear="none"><span style="font-size:10pt;">From: 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>></span><br clear="none"><span style="font-size:10pt;">To: 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>></span><br clear="none"><span style="font-size:10pt;">Subject: Re: [PSUBS-MAILIST] Oil expansion</span><br clear="none"><span style="font-size:10pt;">Date: Tue, 4 Jun 2019 13:31:04 +1200</span><br clear="none"><br clear="none"><div style="font-size:10pt;"></div><div style="font-size:10pt;">Brian,</div><div style="font-size:10pt;">you could, but the narrow tube would need to be big enough to</div><div style="font-size:10pt;">contain the expansion of the WD40. There is coefficient of expansion data</div><div style="font-size:10pt;">on the WD40 documents, so you could work out what you need in a worst</div><div style="font-size:10pt;">case scenario, then work out the compression of the air at your maximum dive </div><div style="font-size:10pt;">depth. You will become slightly heavier at depth with that method though.</div><div style="font-size:10pt;">I did see a bellows type item posted by a psubber on Facebook recently but</div><div style="font-size:10pt;">can't remember by whom. ( or is it "by who")</div><div style="font-size:10pt;">Alan</div><div style="font-size:10pt;"><br clear="none"></div><div style="font-size:10pt;"><br clear="none">On 4/06/2019, at 12:25 PM, Brian Cox 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 style="font-size:10pt;"><div><div style="font-family:Arial, sans-serif;font-size:10pt;"><font size="2">Alan,</font><div><font size="2"> I was thinking if the tube was pointing down into the water then as you submerged the pressure in the water would compress the air up into the tube. To allow for deeper depths ( even though the most compression occurs initially at 33') to make sure the water traveling up the tube doesn't make the turn and head down to the motor I was thinking of putting a larger diameter pipe at the bottom so there would be more air to compress thereby compressing everything below the turn.</font></div><div><font size="2"><br clear="none"></font></div><div><font size="2">Brian</font></div><div><font size="2"><br clear="none"></font></div><div><font size="2"><br clear="none"></font><br clear="none"><span style="font-size:10pt;">--- <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:</span><br clear="none"><br clear="none"><span style="font-size:10pt;">From: 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>></span><br clear="none"><span style="font-size:10pt;">To: 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>></span><br clear="none"><span style="font-size:10pt;">Subject: Re: [PSUBS-MAILIST] Oil expansion</span><br clear="none"><span style="font-size:10pt;">Date: Tue, 4 Jun 2019 12:01:14 +1200</span><br clear="none"><br clear="none"><div style="font-size:10pt;"><span></span></div><div style="font-size:10pt;"><div></div><div>Brian,</div><div>I wasn't thinking of it sitting in the yard!</div><div>If you were leaving the tube open, you could just tape a plastic bag around</div><div>the top during storage. There are probably hundreds of flexible items</div><div>that would be suitable for a permanent solution if you didn't need </div><div>Over pressure, just make sure they are compatible with WD40.</div><div>I don't think the regulator would be an option for storage as it relies on air </div><div>pressure from the tanks; unless you want to keep them on your sub with open </div><div>valves.</div><div>Alan</div><div><br clear="none"></div><div><br clear="none">On 4/06/2019, at 11:14 AM, Brian Cox 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><div><div style="font-family:Arial, sans-serif;font-size:10pt;"><font size="2" style=""><font face="Arial, sans-serif">Hank, I think in your situation where it's really cold you have less of a problem. I have two things working against me , I have a very large volume of oil (wd40) and we have some pretty significant temperature swings here ( from 40F to 90F+) So when my sub sits out in my yard the oil starts creeping up the expansion hose. </font></font><div><font size="2" style=""><font face="Arial, sans-serif"><br clear="none"></font></font></div><div><font size="2" style=""><font face="Arial, sans-serif">Alan, That sounds like it could be an option for me. I'll have to check that out.</font></font></div><div><font size="2" style=""><font face="Arial, sans-serif"><br clear="none"></font></font></div><div><font size="2" style=""><font face="Arial, sans-serif"> What I'm thinking about doing in the meantime is running a hose up from the motor and then and then down to the bottom of the sub and just leave it open. And I might put a large diameter pvc pipe ( 1 1/2" ) at the bottom .</font></font></div><div><font face="Arial, sans-serif" size="2"><br clear="none"></font></div><div><font face="Arial, sans-serif" size="2">Brian</font></div><div><font face="Arial, sans-serif" size="2"><br clear="none"></font></div><div><font face="Arial, sans-serif" size="2"><br clear="none"></font><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">--- <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:</span><br clear="none"><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">From: 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>></span><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">To: Brian Cox 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><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">Subject: Re: [PSUBS-MAILIST] Oil expansion</span><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">Date: Mon, 3 Jun 2019 21:37:38 +0000 (UTC)</span><br clear="none"><br clear="none"><div style=""><div></div>
<div>Brian,</div><div>Have two oil filled motors on Gamma for vertical thrusters. I fill them put in the plug and forget about them. In the fall I drain the oil and refill in the spring. KISS they work perfectly for years now.</div><div>Hank</div><div><br clear="none"></div>
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On Monday, June 3, 2019, 2:41:56 PM MDT, Brian Cox 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:
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<div><div><div style="font-family:Arial, sans-serif;font-size:10pt;"><font size="2">Hi All,</font><div><font size="2"> What is everybody doing to allow for expansion and contraction of their oil filled motors? </font></div><div><font size="2"><br clear="none"></font></div><div><font size="2">Brian</font></div><div><font size="2"><br clear="none"></font></div><div><font size="2"><br clear="none"></font></div></div>
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