<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hi Rick,</div><div id="AppleMailSignature">I presume that was miracle oil!</div><div id="AppleMailSignature">I have tried a few oils in my experiments building thrusters.</div><div id="AppleMailSignature">I have gone to silicone as I believe Emile & maybe Carsten have.</div><div id="AppleMailSignature">With the various oils, in a short time some of the insulation on my wires degraded.</div><div id="AppleMailSignature">Also I'm suspicious that the glue positioning my hall sensor board went soft</div><div id="AppleMailSignature">in the oil & let the hall sensor move.</div><div id="AppleMailSignature">Greg also noticed some deterioration of plastic in his oil filled thruster.</div><div id="AppleMailSignature">I did experiments soaking various plastics in WD40 etc & were getting a</div><div id="AppleMailSignature">break down of some of the plastics in a short time.</div><div id="AppleMailSignature">You might get away with it depending on the use of or type of plastic in the</div><div id="AppleMailSignature">motor. Brian better cross his fingers as several gallons of silicone would be </div><div id="AppleMailSignature">pretty expensive.</div><div id="AppleMailSignature">Alan</div><div id="AppleMailSignature"><br><br>Sent from my iPad</div><div><br>On 3/04/2018, at 5:32 PM, Rick Patton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Seems like quite an expansion rate for the oil you used. I will be using merical oil and am hoping for very little volume expansion so the bladder's don't have to be that large.<div>Rick</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Apr 2, 2018 at 6:29 PM, Alan via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>Hi Brian,</div><div id="m_-8786704318919271524AppleMailSignature">you should get a lot more cooling in the water. When testing my lights, they</div><div id="m_-8786704318919271524AppleMailSignature">heated to the point where you could only touch them for a few seconds</div><div id="m_-8786704318919271524AppleMailSignature">after 5 minutes but stayed warm for an hour in water.</div><div id="m_-8786704318919271524AppleMailSignature">You were testing with no load on the thruster. It will heat up quite a bit</div><div id="m_-8786704318919271524AppleMailSignature">quicker with a load on. </div><div id="m_-8786704318919271524AppleMailSignature">Cheers Alan<br><br>Sent from my iPad</div><span class=""><div><br>On 3/04/2018, at 2:52 PM, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family:Arial,sans-serif;font-size:10pt"><div>Hi All , Tested my motor pods today for about an hour at about 3/4 maximum speed. Had about 8 feet of 1/2" vinyl tubing coming from the top of the motors going straight up into the air and hanging from my overhead I beams. Had the vinyl tubing connected to small inner tubes that had the air evacuated out of them. It was a cool day ( overcast, 60 degrees) . I ran the motors for over an hour, by the end of the hour the wd40 had climbed the whole 8 feet of tubing to the base of the inner tube. The motor pods were warm. If the sub had been in the water I don't think I would have had as much expansion of the oil. So I think that is going to work pretty good. Gives me a chance to run the batteries down significantly to see how my battery charger works with drained batteries, and how long it takes to bring them back up.</div><div> </div><div>Brian</div><div> </div><div> </div></div></div></blockquote></span><blockquote type="cite"><div><span>______________________________<wbr>_________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.<wbr>org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a></span><br></div></blockquote></div><br>______________________________<wbr>_________________<br>
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