<html><head></head><body><p dir="ltr">Hank, I have a newer version that is just about ready for release, so don't get too invested. That said, the tangent line is the transition between the cylinder and the 2:1 ellipse on the inside surface, or the cylinder and concentric surface (also an ellipse, but not true 2:1) on the outside surface. </p>
<p dir="ltr">Sean<br>
</p>
<br><br><div class="gmail_quote">On October 2, 2015 3:35:45 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 id="yui_3_16_0_1_1443821559549_2401">Hi Sean,</div><div id="yui_3_16_0_1_1443821559549_2401" dir="ltr">My wife fixed things so my Mac could run your head calculator on Psubs. My question is with the elliptical head inside depth, measure at the tangent line. Where is the tangent line, I am assuming from the base of the knuckle? </div><div id="yui_3_16_0_1_1443821559549_2401" dir="ltr">Hank</div></div><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>