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--></style></head><body bgcolor="white" lang="EN-US" link="blue" vlink="purple"><p dir="ltr">Temperature doesn't really factor in to the calculations. Technically, seawater density is a function of both temperature and salinity (and very slight compressibility), but the user just enters an average value for density. Similarly, the shell material properties can be tweaked from the average values that are programmed in as defaults, to accommodate specific known material test values or just for increased conservatism. The calculations are assumed to be valid for any material within transition temperature limits, but no specific attempt is made to model creep in acrylic or toughness transitions in shell materials at extremely low or high temperatures. This software is just an implementation of the formulas presented in the ABS Rules. Simply put, if seawater is still liquid at your operating temperature, you're probably okay. The lack of perfect determinism at failure is why we have
safety factors.</p>
<p dir="ltr">Sean<br>
</p>
<br><br><div class="gmail_quote">On November 14, 2014 2:50:52 PM MST, Hugh Fulton via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sean,<p></p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">That is a very sexy programme you have there. What temp do you have as standard for that calc?<p></p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards, Hugh<p></p></span></p><div><p class="MsoNormal"><span lang="EN-NZ" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><p> </p></span></p></div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><p> </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
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Sean T. Stevenson via Personal_Submersibles<br /><b>Sent:</b> Friday, 14 November 2014 6:45 p.m.<br /><b>To:</b> Personal Submersibles General Discussion<br /><b>Subject:</b> Re: [PSUBS-MAILIST] bow window<p></p></span></p></div></div><p class="MsoNormal"></p><p> </p><div><p class="MsoNormal">On 2014-11-02 12:06, Vance Bradley via Personal_Submersibles wrote:</p><p></p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><p class="MsoNormal">Cliff, I'm thinking full hull diameter, 36" or thereabouts.</p><p></p></div><div><p class="MsoNormal">Vance</p><p></p></div></blockquote><p class="MsoNormal"><br />Vance - I was running some hull calcs for Brian Cox, so I ran a calc for your 36" dome port
just to see... Looks like you could get away with one inch thick material for a 500' test depth. <br />Also - the calculator is designed for a full shell, so cut all the weight and buoyancy figures in half for a hemisphere.<br /><br />Sean<br /><br /><br /><img width="1064" height="744" id="_x0000_i1025" src="content://com.kaitenmail.attachmentprovider/a22c8ebf-aa51-421e-a5e2-d820b05e73ac/24/RAW" /><br /><br /><br />__________ Information from ESET NOD32 Antivirus, version of virus signature database 10722 (20141114) __________<br /><br />The message was checked by ESET NOD32 Antivirus.<br /><br /><a href="http://www.eset.com">http://www.eset.com</a></p><p></p></div> <br /><br />__________ Information from ESET NOD32 Antivirus, version of virus signature database 10722 (20141114) __________<br /><br />The message was checked by ESET NOD32 Antivirus.<br /><br /><a href="http://www.eset.com">http://www.eset.com</a><br /> <p style="margin-top: 2.5em; margin-bottom: 1em;
border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />Personal_Submersibles mailing list<br />Personal_Submersibles@psubs.org<br /><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br /></pre></blockquote></div></body></html>