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<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'>Håvard, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Some quick awnsers..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 color=black 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"><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 <st1:metricconverter
ProductID="200 meters" w:st="on">200 meters</st1:metricconverter>, 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.<o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>> Hull dia?? <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></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.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></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?..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>>>You consume /
burn the oxygen. No pressure rise<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'><o:p> </o:p></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 <st1:metricconverter
ProductID="500 feet" w:st="on">500 feet</st1:metricconverter>?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>>> ceramic /
mechanical seal like in pumps<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'><o:p> </o:p></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 size=1 color=black
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'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>>> Subconn and
similar company’s sell them. You can also use high pressure cable glands
(up to <st1:metricconverter ProductID="400 M" w:st="on">400 M</st1:metricconverter>)
Or make your own with brass and Epoxy.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=1 color=black 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 <st1:metricconverter ProductID="500 feet" w:st="on">500
feet</st1:metricconverter>, how do i find out how thick the </span></font><b><font
size=1 color=black 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'><o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>See table: You only have
to translate a few German words.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=1 color=black 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'><o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>If you want it legal:
ZWcad is a cheap but good Autocad clone<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=1 color=navy 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><o:p></o:p></p>
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