<html><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_1424815589972_2500" dir="ltr"><span>Havard,</span></div><div id="yui_3_16_0_1_1424815589972_2500" dir="ltr"><span>should have mentioned the book "Manned Submersibles". There is a </span></div><div id="yui_3_16_0_1_1424815589972_2500" dir="ltr"><span>link to an e version on the Psub site.</span></div><div id="yui_3_16_0_1_1424815589972_2500" dir="ltr"><span id="yui_3_16_0_1_1424815589972_2733">Old but relevant & I know a lot of the members have read it or have copies,</span></div><div id="yui_3_16_0_1_1424815589972_2500" dir="ltr"><span id="yui_3_16_0_1_1424815589972_2734">& would endorse it as a good start to a sub building project.</span></div><div id="yui_3_16_0_1_1424815589972_2500" dir="ltr"><span>Alan</span></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1424815589972_2503"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1424815589972_2502"> <div dir="ltr" id="yui_3_16_0_1_1424815589972_2501"> <hr size="1"> <font size="2" face="Arial" id="yui_3_16_0_1_1424815589972_2506"> <b id="yui_3_16_0_1_1424815589972_2505"><span style="font-weight:bold;" id="yui_3_16_0_1_1424815589972_2504">From:</span></b> Alan James via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Tuesday, February 24, 2015 12:49 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] many questions from a rookie<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1424815589972_2735"><br><div id="yiv7127032680"><div id="yui_3_16_0_1_1424815589972_2737"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_1_1424815589972_2736"><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6922"><span>Hi Havard,</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span id="yiv7127032680yui_3_16_0_1_1424733706946_6921">a couple of years ago I looked at ZW cad & it was economical but didn't have an FEA option.</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span>It might have changed since.</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span id="yiv7127032680yui_3_16_0_1_1424733706946_6997">You could export the file to another program (can't remember it's name) but this program was</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span>very expensive.</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7077">I bought Rhino 5 & two plug ins, "Orca" (marine design) & scan & solve, which is a basic FEA</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7197">program. I am doubtful of the accuracy of scan & solve as I questioned one of their experts</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7198">& he was very evasive on how accurate the program was. It is generally thought best to leave </span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7215">FEA up to the experts.</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7280">Emile touched on your question about pressure build up. Oxygen is fed in at the same rate as</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7281">you consume it & is breathed out in identical volume as CO2. The CO2 is removed in the CO2</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7308">scrubber.</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span>Alan</span></div><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6916"><span><br clear="none"></span></div><br clear="none"> <div class="qtdSeparateBR"><br><br></div><div class="yiv7127032680yqt4784008648" id="yiv7127032680yqt19587"><div id="yiv7127032680yui_3_16_0_1_1424733706946_6919" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div id="yiv7127032680yui_3_16_0_1_1424733706946_6918" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6917"> <hr id="yiv7127032680yui_3_16_0_1_1424733706946_6939" size="1"> <font id="yiv7127032680yui_3_16_0_1_1424733706946_6920" size="2" face="Arial"> <b><span style="font-weight:bold;">From:</span></b> Håvard Hardy via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none"> <b id="yiv7127032680yui_3_16_0_1_1424733706946_7333"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7332" style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <Personal_Submersibles@psubs.org> <br clear="none"> <b id="yiv7127032680yui_3_16_0_1_1424733706946_7335"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7334" style="font-weight:bold;">Sent:</span></b> Tuesday, February 24, 2015 9:18 AM<br clear="none"> <b id="yiv7127032680yui_3_16_0_1_1424733706946_7337"><span id="yiv7127032680yui_3_16_0_1_1424733706946_7336" style="font-weight:bold;">Subject:</span></b> [PSUBS-MAILIST] many questions from a rookie<br clear="none"> </font> </div> <div class="yiv7127032680y_msg_container" id="yiv7127032680yui_3_16_0_1_1424733706946_6953"><br clear="none"><div id="yiv7127032680"><div dir="ltr" id="yiv7127032680yui_3_16_0_1_1424733706946_6986">i allways wantet to build a sub, but still got allot of research to do.. there is a few things i could not find the <span style="color:rgb(0,0,0);font-size:13px;white-space:nowrap;">answer in the internet, so have to ask here.</span><div id="yiv7127032680yui_3_16_0_1_1424733706946_6996"><span style="color:rgb(0,0,0);font-size:13px;white-space:nowrap;"><br clear="none"></span></div><div id="yiv7127032680yui_3_16_0_1_1424733706946_6994"><font color="#000000"><span style="white-space:nowrap;">i was thinking of building a small 1 man sub. i used the psub </span></font><a rel="nofollow" shape="rect" id="yiv7127032680yui_3_16_0_1_1424733706946_6995" target="_blank" href="http://www.psubs.org/design/unstiffcyl" style="font-family:Arial, Verdana, sans-serif;font-size:12px;">Unstiffened Cylinder Calculator</a> to check how thick the hull hadd to be, to get to 200 meters, 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.</div><div id="yiv7127032680yui_3_16_0_1_1424733706946_6993"><br clear="none"></div><div id="yiv7127032680yui_3_16_0_1_1424733706946_6992">a few other tecnical things i dont know.</div><div id="yiv7127032680yui_3_16_0_1_1424733706946_6991"><br clear="none"></div><div id="yiv7127032680yui_3_16_0_1_1424733706946_6990">How to you keep the pressure not to rise in the pressure hull? you need oxygen, so the pressure will rise?..</div><div id="yiv7127032680yui_3_16_0_1_1424733706946_6989"><br clear="none"></div><div id="yiv7127032680yui_3_16_0_1_1424733706946_6988">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 500 feet?</div><div id="yiv7127032680yui_3_16_0_1_1424733706946_6987"><br clear="none"></div><div id="yiv7127032680yui_3_16_0_1_1424733706946_6985">does somone sell the <span id="yiv7127032680yui_3_16_0_1_1424733706946_6984" style="color:rgb(0,0,0);font-family:Arial;font-size:10.6666669845581px;letter-spacing:1px;line-height:12.0533332824707px;">through hulls to get wires thru the pressure hull? or do i have to make on my own?</span></div><div><span style="color:rgb(0,0,0);font-family:Arial;font-size:10.6666669845581px;letter-spacing:1px;line-height:12.0533332824707px;"><br clear="none"></span></div><div><font color="#000000" face="Arial"><span style="font-size:10.6666669845581px;letter-spacing:1px;line-height:12.0533332824707px;">if the pressure hull have a operation deapth off 500 feet, how do i find out how thick the </span></font><span style="color:rgb(0,0,0);font-size:10.6666669845581px;font-weight:bold;letter-spacing:1px;text-align:center;">Viewports have to be..</span></div><div><span style="color:rgb(0,0,0);font-size:10.6666669845581px;font-weight:bold;letter-spacing:1px;text-align:center;"><br clear="none"></span></div><div><span style="color:rgb(0,0,0);font-size:10.6666669845581px;font-weight:bold;letter-spacing:1px;text-align:center;">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></div><div><span style="color:rgb(0,0,0);font-size:10.6666669845581px;font-weight:bold;letter-spacing:1px;text-align:center;"><br clear="none"></span></div><div><span style="color:rgb(0,0,0);font-size:10.6666669845581px;font-weight:bold;letter-spacing:1px;text-align:center;">probably have many other things coming :)</span></div><div><span style="color:rgb(0,0,0);font-size:10.6666669845581px;font-weight:bold;letter-spacing:1px;text-align:center;"><br clear="none"></span></div><div><span style="color:rgb(0,0,0);font-size:10.6666669845581px;font-weight:bold;letter-spacing:1px;text-align:center;">Håvard.</span></div></div></div><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"><br clear="none"><br clear="none"></div> </div> </div></div> </div></div></div><br><div class="yqt4784008648" id="yqt15803">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div> </div></body></html>