<div dir="ltr"><div>Hi Hank,</div><div><br></div><div>The drop weight contributes to transverse stability. Be sure to calculate what happens to stability when it's dropped. If you have a large weight, it is quite possible the sub's new center of gravity could end up above the center of buoyancy. </div><div><br></div><div><br></div><div>Best,</div><div><br></div><div>Alec</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Nov 12, 2016 at 10:54 PM, 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"><u></u>



<div id="m_-7117383588319342497role_body" style="FONT-SIZE:10pt;FONT-FAMILY:Arial;COLOR:#000000"><font id="m_-7117383588319342497role_document" color="#000000" size="2" face="Arial">
<div><font size="3">Hank,</font></div>
<div><font size="3">Yes, there is a rule.  The drop weight must be heavy 
enough so that if all compartments were fully flooded except for the main cabin, 
the release of the drop weight would cause the vessel to rise to the 
surface.  "All compartments" includes battery pods and anything else that 
could take on water.</font></div>
<div><font size="3">Jim</font></div><span class="">
<div> </div>
<div>
<div>In a message dated 11/12/2016 7:49:08 P.M. Central Standard Time, 
<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a> writes:</div>
<blockquote style="PADDING-LEFT:5px;MARGIN-LEFT:5px;BORDER-LEFT:blue 2px solid"><font style="BACKGROUND-COLOR:transparent" color="#000000" size="2" face="Arial">
  <div style="FONT-SIZE:12px;FONT-FAMILY:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;COLOR:#000;BACKGROUND-COLOR:#fff">
  <div id="m_-7117383588319342497yui_3_16_0_ym19_1_1479001374322_5258">Can someone tell me what the 
  proper weight of a drop weight is.  There must be a rule.</div>
  <div id="m_-7117383588319342497yui_3_16_0_ym19_1_1479001374322_5258">Hank</div></div><br><br>______________________________<wbr>_________________<br>Personal_Submersibles 
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