<html><head></head><body><p dir="ltr">What are you making?</p>
<p dir="ltr">As I mentioned, the DW hulls are segmented according to a cube projection, so a complete sphere would have six segments / sides and eight vertices, and three times the welding (and subsequent 100% NDT inspection) that two hemispheres would require.</p>
<p dir="ltr">You need a template for cutting, and an accurate jig for welding them together.</p>
<p dir="ltr">Did you get hemispheres supplied out of spec? Or is this a new project?</p>
<p dir="ltr">Sean</p>
<br><br><div class="gmail_quote">On October 22, 2015 4:15:08 PM MDT, hank pronk 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;">
<div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div><span>Sean,</span></div><div dir="ltr" id="yui_3_16_0_1_1445551920035_2874"><span id="yui_3_16_0_1_1445551920035_2873">Do you know how many sections a DW hull has and what is the technical name for what I want to do. I will ask EE if they will make the pieces. I think Dr Nuytten calls them woks? I want to sound like I know what I am talking about :-)</span></div><div dir="ltr" id="yui_3_16_0_1_1445551920035_2872"><span>Hank</span></div> <br /><div class="qtdSeparateBR"><br /><br /></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"> <font size="2" face="Arial">
On Thursday, October 22, 2015 12:27 PM, Sean T. Stevenson via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br /> </font> </div> <br /><br /> <div class="y_msg_container"><div id="yiv9870062619"><div><div dir="ltr">That's just a construction. Any regular polydehron that fits in your sphere can be used as a guide. Nuytco uses a cubic projection, so if you imagine a cube where all of the vertices touch the sphere, the weld lines are the great circle routes between vertices.</div>
<div dir="ltr">If two hemispheres don't work for you, the next lowest part count you can go to is four, corresponding to the tetrahedron projection.</div>
<div dir="ltr">Sean<br clear="none" />
</div>
<br clear="none" /><br clear="none" /><div class="yiv9870062619gmail_quote">On October 22, 2015 11:49:51 AM MDT, hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<blockquote class="yiv9870062619gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex;">
<div class="yiv9870062619yqt4325772942" id="yiv9870062619yqt51135"><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td colspan="1" rowspan="1" valign="top"><div>Sean, do you have a program that will disect a sphere into equal sections like the DW. I am looking for a way to cut hemis into equal sections to create a new sphere. When we buy heads they have full cerumference dent caused from changing the dies. I am thinking about buying three heads to make one perfect sphere.</div></td></tr></tbody></table></div><div style="margin-top:2.5em;margin-bottom:1em;border-bottom:1px solid #000;"></div><pre class="yiv9870062619k9mail"></pre><hr /><br clear="none" />Personal_Submersibles mailing list<br clear="none" />Personal_Submersibles@psubs.org<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"
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