<div dir="ltr">Here is a link to a presentation in 2004 by Dr. Jerry D. Stachiw on acrylic viewports. Worth a read as well.<br><br><a href="http://www.hydroports.com/documents/New_Orleans_Meeting-Feb_2004.pdf">http://www.hydroports.com/documents/New_Orleans_Meeting-Feb_2004.pdf</a><br></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div>Best Regards,<br>David Colombo<br><img src="http://static.squarespace.com/static/533310a9e4b0fba62008a464/t/5339c1f2e4b041bac4e25d1b/1396294132055/?format=500w" height="110" width="200"><br>804 College Ave<br>Santa Rosa, CA. 95404<br>(707) 536-1424<br><a href="http://www.SeaQuestor.com" target="_blank">www.SeaQuestor.com</a><br><br></div></div></div></div>
<br><div class="gmail_quote">On Mon, Feb 23, 2015 at 2:43 PM, Petar Topljak 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"><p dir="ltr">Hi, </p>
<p dir="ltr">To calculate viewports and pressure vessel (hull) you can download for free ASME PVHO standard which is very simple and guides you trough the process. Standard provides stiffener geometry, window geometry etc. <br></p>
<p dir="ltr">Regards,</p>
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<p class="MsoNormal"><font color="navy" size="3" face="Times New Roman"><span style="font-size:12.0pt;color:navy">Håvard, <u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"><u></u> <u></u></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">Some quick awnsers..<u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"><u></u> <u></u></span></font></p>
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<p class="MsoNormal"><font color="black" size="3" face="Times New Roman"><span style="font-size:12.0pt;color:black">i was thinking of building a
small 1 man sub. i used the psub </span></font><a href="http://www.psubs.org/design/unstiffcyl" target="_blank"><font size="1" face="Arial"><span style="font-size:9.0pt;font-family:Arial">Unstiffened Cylinder Calculator</span></font></a> to
check how thick the hull hadd to be, to get to <u></u>200 meters<u></u>, the hull
have to be over 15mm thick.. so thought maybe i should use ribbs to get it
thinner, but dont know how to calculate whit ribs, and how to find out how many
ribs i need, and spacing betwen them.<u></u><u></u></p>
<p class="MsoNormal"><font color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">> Hull dia?? <u></u><u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">a few other tecnical things i dont know.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">How to you keep the pressure not to rise in the pressure hull? you need
oxygen, so the pressure will rise?..<u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy" lang="EN-GB">>>You consume /
burn the oxygen. No pressure rise<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt" lang="EN-GB"><u></u> <u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">and how do you get the propeler shaft thru the hull, and not get water
in the sub. easy on a boat where the pressure is not so big, but att <u></u>500 feet<u></u>?<u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy" lang="EN-GB">>> ceramic /
mechanical seal like in pumps<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt" lang="EN-GB"><u></u> <u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">does somone sell the </span></font><font color="black" size="1" face="Arial"><span style="font-size:8.0pt;font-family:Arial;color:black;letter-spacing:.75pt">through hulls to get wires thru the pressure hull? or do
i have to make on my own?</span></font><font size="1" face="Arial"><span style="font-size:8.0pt;font-family:Arial;letter-spacing:.75pt"><u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy" lang="EN-GB">>> Subconn and
similar company’s sell them. You can also use high pressure cable glands
(up to <u></u>400 M<u></u>)
Or make your own with brass and Epoxy.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt" lang="EN-GB"><u></u> <u></u></span></font></p>
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<p class="MsoNormal"><font color="black" size="1" face="Arial"><span style="font-size:8.0pt;font-family:Arial;color:black;letter-spacing:.75pt">if the pressure hull
have a operation deapth off <u></u>500
feet<u></u>, how do i find out how thick the </span></font><b><font color="black" size="1" face="Trebuchet MS"><span style="font-size:8.0pt;font-family:"Trebuchet MS";color:black;letter-spacing:.75pt;font-weight:bold">Viewports
have to be..</span></font></b><b><font size="1" face="Trebuchet MS"><span style="font-size:8.0pt;font-family:"Trebuchet MS";letter-spacing:.75pt;font-weight:bold"><u></u><u></u></span></font></b></p>
<p class="MsoNormal"><font color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy" lang="EN-GB">See table: You only have
to translate a few German words.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt" lang="EN-GB"><u></u> <u></u></span></font></p>
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<p class="MsoNormal"><b><font color="black" size="1" face="Trebuchet MS"><span style="font-size:8.0pt;font-family:"Trebuchet MS";color:black;letter-spacing:.75pt;font-weight:bold">and does anyone no of a good drawing program to draw
the sub? have only made it on paper.. need to make on the computer and get a
FEA.</span></font></b><b><font size="1" face="Trebuchet MS"><span style="font-size:8.0pt;font-family:"Trebuchet MS";letter-spacing:.75pt;font-weight:bold"><u></u><u></u></span></font></b></p>
<p class="MsoNormal"><font color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy" lang="EN-GB">If you want it legal:
ZWcad is a cheap but good Autocad clone<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt" lang="EN-GB"><u></u> <u></u></span></font></p>
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<p class="MsoNormal"><b><font color="navy" size="1" face="Trebuchet MS"><span style="font-size:8.0pt;font-family:"Trebuchet MS";color:navy;letter-spacing:.75pt;font-weight:bold">Regards, Emile</span></font></b><u></u><u></u></p>
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