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</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Polyester is not good for water absorption.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Vinyl ester or Epoxy are both better. I was advised to go with vinylester by my composites consultant.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hugh<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>hank pronk via Personal_Submersibles<br><b>Sent:</b> Thursday, 10 May 2018 9:48 PM<br><b>To:</b> emile via Personal_Submersibles<br><b>Subject:</b> Re: [PSUBS-MAILIST] material question<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Emile, I would weigh the part then pressurize it for for several hours then weigh it again. If there is water absorbed it may still be in the part after removing it from the chamber. You can also put the part under stress by bending it over a fixture, then pressure test it while under stress. You can stress the part to near failure in a fixture then pressure test it for several days. If it can handle that then your good to go, I would think. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>I would bet the propellers will work just fine at 5,000 psi.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Hank<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'><o:p> </o:p></span></p></div><div id="yahoo_quoted_6337315852"><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>On Thursday, May 10, 2018, 1:55:09 AM MDT, emile via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote: <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p> </o:p></span></p></div><div><div id=yiv7608311343><div><div><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Thanks for the respons .</span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Testing sounds logical but it should be long term and it is difficult to measure the water ingress.</span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Polyester yachts do have a osmosis problem when they sit all year in the water. </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>We use thin fiberglass plate in the rim thrusters and we want to use it in a deep diving ROV. </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Br, Emile</span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><div id=yiv7608311343yqt81446><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=yiv7608311343msonormal><b><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Van:</span></b><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> Personal_Submersibles <a href="mailto:[mailto:personal_submersibles-bounces@psubs.org]">[mailto:personal_submersibles-bounces@psubs.org]</a> <b>Namens </b>Alan via Personal_Submersibles<br><b>Verzonden:</b> woensdag 9 mei 2018 23:39<br><b>Aan:</b> Personal Submersibles General Discussion<br><b>Onderwerp:</b> Re: [PSUBS-MAILIST] material question<o:p></o:p></span></p></div></div><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> <o:p></o:p></span></p><div><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Hi Emile,<o:p></o:p></span></p></div><div id=yiv7608311343AppleMailSignature><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>my brother-in-laws fibreglass yacht has been sitting in the harbour<o:p></o:p></span></p></div><div id=yiv7608311343AppleMailSignature><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>for at least 30 years, so pretty impervious to water.<o:p></o:p></span></p></div><div id=yiv7608311343AppleMailSignature><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>The glass in the fibre would not crush, but the resin around it would squash<o:p></o:p></span></p></div><div id=yiv7608311343AppleMailSignature><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>a little under that pressure. I would think the resin would seal any exposed <o:p></o:p></span></p></div><div id=yiv7608311343AppleMailSignature><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>fibres by squashing around them when put under that kind of pressure.<br>What are you sending down that deep?<o:p></o:p></span></p></div><div id=yiv7608311343AppleMailSignature><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Alan<br>Sent from my iPad<o:p></o:p></span></p></div><div><p class=yiv7608311343msonormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><br>On 10/05/2018, at 5:34 AM, emile via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Hi All, <o:p></o:p></span></p><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> <o:p></o:p></span></p><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Material question:<o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Can prefabricated epoxy/glassfibre plate material (like PCB) withstand 5000M / 18.000Ft presurised water? </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Or will it be impregnated after a while?</span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Thanks in advance</span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> </span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>met vriendelijke groet, with best regards<o:p></o:p></span></p><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> <o:p></o:p></span></p><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>Emile D.L. van Essen<o:p></o:p></span></p><p class=yiv7608311343msonormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'> <o:p></o:p></span></p></div></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=yiv7608311343msonormal><span style='font-family:"Helvetica","sans-serif";color:#26282A'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">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></span><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'><o:p></o:p></span></p></div></blockquote></div></div></div></div><div id=yqt87294><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#26282A'>_______________________________________________<br>Personal_Submersibles mailing list<br><a 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><o:p></o:p></span></p></div></div></div></div></div></div></body></html>