<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_1_1452794902923_7346"><span>Hank,</span></div><div id="yui_3_16_0_1_1452794902923_7346" dir="ltr"><span id="yui_3_16_0_1_1452794902923_7374">my computer is dying so fired that last email off before I lost it.</span></div><div id="yui_3_16_0_1_1452794902923_7346" dir="ltr"><span id="yui_3_16_0_1_1452794902923_8540">With the relays, depending on the type, you may need to drill them</span></div><div id="yui_3_16_0_1_1452794902923_7346" dir="ltr"><span id="yui_3_16_0_1_1452794902923_8541">to let oil in to equalize the inside or they may crush. You could</span></div><div id="yui_3_16_0_1_1452794902923_7346" dir="ltr"><span id="yui_3_16_0_1_1452794902923_8542">pressure test solid state relays if that is what you are using.</span></div><div id="yui_3_16_0_1_1452794902923_7346" dir="ltr"><span id="yui_3_16_0_1_1452794902923_8543">Alan</span></div><br> <div class="qtdSeparateBR" id="yui_3_16_0_1_1452794902923_7343"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_1_1452794902923_7340" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1452794902923_7339"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1452794902923_7338"> <div dir="ltr" id="yui_3_16_0_1_1452794902923_7337"> <font size="2" face="Arial" id="yui_3_16_0_1_1452794902923_7336"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br> <b id="yui_3_16_0_1_1452794902923_7342"><span style="font-weight: bold;" id="yui_3_16_0_1_1452794902923_7341">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b id="yui_3_16_0_1_1452794902923_7335"><span style="font-weight: bold;" id="yui_3_16_0_1_1452794902923_7334">Sent:</span></b> Friday, January 15, 2016 5:48 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] battery compensation<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1452794902923_8557"><br><div id="yiv2593403126"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"><div id="yiv2593403126yui_3_16_0_1_1452789352970_2427" dir="ltr">Thinking ahead, I need to reduce the weight of my deep diver. I am now planning external batteries- lead acid in oil. This reduces the amount of syntactic foam needed. My deal on CNG tanks fell apart. The ebay seller would not honour the sale, can't blame him. I may go with store bought syntactic foam if business looks good with 30 dollar per barrel oil, Yikes. </div><div id="yiv2593403126yui_3_16_0_1_1452789352970_2427" dir="ltr"><br></div><div id="yiv2593403126yui_3_16_0_1_1452789352970_2427" dir="ltr">I am not sure how to go about the oil filled battery set up. I assume the batteries are filled as high as possible with water then topped up with oil, then the compartment filled with oil and a rubber lid on that. I assume you take a syringe with distilled water to top the batteries up from time to time. This way you wouldn't have to drain the oil.</div><div id="yiv2593403126yui_3_16_0_1_1452789352970_2427" dir="ltr">Does anyone know how heavy a battery weighs under water compared to in air?</div><div id="yiv2593403126yui_3_16_0_1_1452789352970_2427" dir="ltr"><br></div><div id="yiv2593403126yui_3_16_0_1_1452789352970_2427" dir="ltr">I also am thinking about having the reversing relays for the motors in the oil tank to reduce the amount and size of wires penetrating the hull. I will just send small wires for messaging to the relays.</div><div id="yiv2593403126yui_3_16_0_1_1452789352970_2427" dir="ltr">Hank</div></div></div></div><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></div></body></html>