<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hank,</div><div>so their is no taper or key to hold the epoxy,</div><div>just a standard tube threaded on the outside?</div><div>Alan<br><br>Sent from my iPad</div><div><br>On 23/12/2013, at 5:25 AM, hank pronk <<a href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div><span>I just did a potting experiment, I removed the main electric penetrator from my little yellow sub and pressure tested it to 1,000psi. I left it over night and it held 1,000psi with no leaks. That penetrator is my standard simple threaded rod in poly urethane. I tried the same technique with 11 bare wires except I started with 5min epoxy for the first .75in just to seal it to hold the very slow curing poly urethane from leaking out. Well it failed at 1,000psi, I am not sure if is the small wire versus the larger threaded rod. More testing :-) </span></div><div><span>Hank </span></div><div class="yahoo_quoted" style="display: block;"> <br> <br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida
Grande, sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> On Saturday, December 21, 2013 10:45:39 PM, Joe Perkel <<a href="mailto:josephperkel@yahoo.com">josephperkel@yahoo.com</a>> wrote:<br> </font> </div> <div class="y_msg_container"><div id="yiv8079768235"><div><table border="0" cellspacing="0" cellpadding="0"><tbody><tr><td valign="top" rowspan="1" colspan="1">Jon,<br clear="none"><br clear="none">As a diver I would say depth. The reason being that in a blow and go scenario you need to know that last depth and time to blow down to know your bottom time for what would be hopefully, a controlled ascent. Think USN dive tables.<br clear="none"><br clear="none">This is a big reason why I think I personally would limit my own personal maximum operational depth to 250' with a practical use somewhat less. I might design for a 1,000', but I'm not
going there. I really don't think I would like to go any deeper than say something like the Andrea Doria in a homebuilt non certified sub. Conversely, I'd do Titanic in Alvin, Mir, or Nautile in a heartbeat if I got the chance.<br clear="none"><br clear="none">Pay close attention to that next 25 story building you stand next to and picture yourself ascending from street level to the roof line. You may need to stop at the 24th floor for a while, if you can control that last ten
feet that is.<br clear="none"><br clear="none">Joe<br clear="none"><br clear="none"><a href="http://overview.mail.yahoo.com/?.src=iOS" target="_blank" rel="nofollow" shape="rect"><br clear="none"><br clear="none">Sent from Yahoo Mail for iPad</a></td></tr></tbody></table> <div class="yiv8079768235yqt2429999367" id="yiv8079768235yqt65415"><div id="yiv8079768235_origMsg_">
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<span style="font-weight: bold;">From:</span>
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Jon Wallace <<a href="mailto:jonw@psubs.org">jonw@psubs.org</a>>; <br clear="none">
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Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>; <br clear="none">
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<span style="font-weight: bold;">Subject:</span>
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[PSUBS-MAILIST] instruments, pressure display? <br clear="none">
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Sun, Dec 22, 2013 3:34:24 AM <br clear="none">
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<table border="0" cellspacing="0" cellpadding="0"><tbody><tr><td valign="top" rowspan="1" colspan="1"><br clear="none">I will be displaying depth in feet. Is there any practical reason to <br clear="none">also display pressure? It's easy enough for me to do so but it seems <br clear="none">superfluous. Which do you prefer, depth indicator or pressure <br clear="none">indicator, and why?<br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="" rel="nofollow" shape="rect">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></td></tr></tbody></table>
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