<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hank,</div><div id="AppleMailSignature">I saw a number of syntactic foam samples at the Underwater Intervention</div><div id="AppleMailSignature">Convention. The microspheres on the samples for deep diving were tiny.</div><div id="AppleMailSignature">The deeper you go, the smaller the spheres. That idea might have merit</div><div id="AppleMailSignature">depending on how deep you were going, as it would be easier to work with</div><div id="AppleMailSignature">the larger spheres. However if you spent the extra money on resin rather than</div><div id="AppleMailSignature">oil you would have a rigid product.</div><div id="AppleMailSignature">On Alvin I believe the foam was in sections that were pressure tested individually.</div><div id="AppleMailSignature">I think you can get an imploding chain reaction, hence the multiple sections so</div><div id="AppleMailSignature">you don't put all your eggs in one basket.</div><div id="AppleMailSignature">Alan</div><div id="AppleMailSignature"><br><br>Sent from my iPad</div><div><br>On 11/06/2017, at 9:04 AM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div><span>Greg,</span></div><div><span>That is a pretty interesting idea. I would have to do some math, because the spheres gain a lot of strength when reinforced with resin. Very interesting, I would not have thought of that.</span></div><div id="yui_3_16_0_1_1497128490912_3668"><span>Hank</span></div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 13px;"> <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 Saturday, June 10, 2017 1:40 PM, james cottrell via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv1074328082"><div><div style="color:#000;background-color:#fff;font-family:verdana, helvetica, sans-serif;font-size:13px;"><div id="yiv1074328082yui_3_16_0_1_1497123293582_3006"><span>Hank,</span></div><div id="yiv1074328082yui_3_16_0_1_1497123293582_3006"><span><br clear="none"></span></div><div id="yiv1074328082yui_3_16_0_1_1497123293582_3006"><span id="yiv1074328082yui_3_16_0_1_1497123293582_3119">The density of paraffin wax is about 10% less than water and liquefies at about 155 F. You can buy it in bulk online (10 lbs cost about 20$).</span></div><div id="yiv1074328082yui_3_16_0_1_1497123293582_3006"><span><br clear="none"></span></div><div id="yiv1074328082yui_3_16_0_1_1497123293582_3006"><span>Greg</span></div><div class="yiv1074328082qtdSeparateBR" id="yiv1074328082yui_3_16_0_1_1497123293582_3121"><br clear="none"><br clear="none"></div><div class="yiv1074328082yahoo_quoted" style="display:block;"> <div style="font-family:verdana, helvetica, sans-serif;font-size:13px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv1074328082yqt5838243348" id="yiv1074328082yqt95149"><div dir="ltr"> <font size="2" face="Arial"> </font><hr size="1"> <b><span style="font-weight:bold;">From:</span></b> james cottrell via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Saturday, June 10, 2017 2:48 PM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] syntactic foam.<br clear="none"> </div> <div class="yiv1074328082y_msg_container"><br clear="none"><div id="yiv1074328082"><div><div style="color:#000;background-color:#fff;font-family:verdana, helvetica, sans-serif;font-size:13px;"><div><span></span></div><div class="yiv1074328082qtdSeparateBR" id="yiv1074328082yui_3_16_0_1_1497117981886_3402">Hank,</div><div class="yiv1074328082qtdSeparateBR" id="yiv1074328082yui_3_16_0_1_1497117981886_3579"><br clear="none"></div><div class="yiv1074328082qtdSeparateBR" dir="ltr" id="yiv1074328082yui_3_16_0_1_1497117981886_3612">I like your idea. What if you were to use an environmentally friendly oil that is a solid at room temps? In other words heat it to liquid state , pour it in the spheres and let it solidify?</div><div class="yiv1074328082qtdSeparateBR" dir="ltr" id="yiv1074328082yui_3_16_0_1_1497117981886_3613"><br clear="none"></div><div class="yiv1074328082qtdSeparateBR" dir="ltr" id="yiv1074328082yui_3_16_0_1_1497117981886_3616">Greg<br clear="none"><br clear="none"></div><div class="yiv1074328082yahoo_quoted" id="yiv1074328082yui_3_16_0_1_1497117981886_3585" style="display:block;"> <div id="yiv1074328082yui_3_16_0_1_1497117981886_3584" style="font-family:verdana, helvetica, sans-serif;font-size:13px;"> <div id="yiv1074328082yui_3_16_0_1_1497117981886_3583" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv1074328082yqt8910543808" id="yiv1074328082yqt02767"><div dir="ltr" id="yiv1074328082yui_3_16_0_1_1497117981886_3582"> <font id="yiv1074328082yui_3_16_0_1_1497117981886_3581" face="Arial" size="2"> </font><hr id="yiv1074328082yui_3_16_0_1_1497117981886_3580" size="1"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Saturday, June 10, 2017 1:44 PM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> [PSUBS-MAILIST] syntactic foam.<br clear="none"> </div> <div class="yiv1074328082y_msg_container" id="yiv1074328082yui_3_16_0_1_1497117981886_3586"><br clear="none"><div id="yiv1074328082"><div id="yiv1074328082yui_3_16_0_1_1497117981886_3615"><div id="yiv1074328082yui_3_16_0_1_1497117981886_3614" style="color:rgb(0, 0, 0);font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;background-color:rgb(255, 255, 255);"><div id="yiv1074328082yui_3_16_0_1_1497115959959_2837">I have an idea, but not sure if it will work. My idea is to fill a neutrally buoyant container with macro and micro spheres. After the container is as full as possible, then fill with an environmentally friendly oil. This would be more buoyant than using a resin and less complicated and cheaper. My concern is, how well will the spheres stand up against breaking from being in contact with the other spheres and the container. Are these spheres delicate? </div><div id="yiv1074328082yui_3_16_0_1_1497115959959_2837">Hank</div></div></div></div>_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" id="yiv1074328082yui_3_16_0_1_1497117981886_3627" 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 id="yiv1074328082DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br clear="none">
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