<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body><div>Hank,</div><div><br></div><div>Compressed H2 gas.</div><div><br></div><div>Keith T.</div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:85%;color:#575757" dir="auto">Sent from my Verizon, Samsung Galaxy smartphone</div></div><div><br></div><div style="font-size:100%;color:#000000"><!-- originalMessage --><div>-------- Original message --------</div><div>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> </div><div>Date: 7/10/17 2:25 PM (GMT-08:00) </div><div>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org> </div><div>Subject: Re: [PSUBS-MAILIST] Pressure Test </div><div><br></div></div><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1499721900962_4832"><span>Kieth,</span></div><div id="yui_3_16_0_ym19_1_1499721900962_4832"><span id="yui_3_16_0_ym19_1_1499721900962_4923">What are you up to that you need a cng tank?</span></div><div id="yui_3_16_0_ym19_1_1499721900962_4832"><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 Monday, July 10, 2017 9:13 AM, k6fee via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv3802462072"><div><div>Hank,</div><div><br></div><div>Thanks for the info, I'll check out Evil Bay and see what I can find. </div><div><br></div><div>Keith T </div><div><br></div><div><br></div><div><br></div><div id="yiv3802462072composer_signature"><div style="font-size:85%;color:#575757;">Sent from my Verizon, Samsung Galaxy smartphone</div></div><div><br></div><div style="font-size:100%;color:#000000;"><div>-------- Original message --------</div><div>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> </div><div>Date: 7/10/17 2:48 AM (GMT-08:00) </div><div>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org> </div><div>Subject: Re: [PSUBS-MAILIST] Pressure Test </div><div><br></div></div><div style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"><div id="yiv3802462072yui_3_16_0_ym19_1_1499679435530_17164"><span>Kieth,</span></div><div id="yiv3802462072yui_3_16_0_ym19_1_1499679435530_17164" dir="ltr"><span id="yiv3802462072yui_3_16_0_ym19_1_1499679435530_17278">There are CNG tanks on Ebay, with some sellers that have lots of tanks that are still in service. The largest composite CNG tank I have come across is 21 inches OD by 120 inches long. There is a seller close to Salt Lake City Utah with a pretty big inventory.</span></div><div id="yiv3802462072yui_3_16_0_ym19_1_1499679435530_17164" dir="ltr"><span>Hank</span></div> <div class="yiv3802462072qtdSeparateBR"><br><br></div><div class="yiv3802462072yahoo_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 Sunday, July 9, 2017 9:24 PM, k6fee via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="yiv3802462072y_msg_container"><div id="yiv3802462072"><div><div>Where are you guy sourcing the CNG tanks? Are larger diameter tanks available?</div><div><br></div><div>Keith T </div><div><br></div><div><br></div><div><br></div><div id="yiv3802462072composer_signature"><div style="font-size:85%;color:#575757;">Sent from my Verizon, Samsung Galaxy smartphone</div></div><div><br></div><div style="font-size:100%;color:#000000;"><div>-------- Original message --------</div><div>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> </div><div>Date: 7/9/17 7:49 PM (GMT-08:00) </div><div>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org> </div><div>Subject: Re: [PSUBS-MAILIST] Pressure Test </div><div><br></div></div><div style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"><div><span>Steve,</span></div><div><span>Greg was referring to steel cng storage tanks that are 48 inch ID spheres 3.25 inches thick. </span></div><div><span>I have also been looking at composite cng type 4 tanks as buoyancy modules. The tanks would be at full pressure (3,600 psi) </span></div><div><span>Hank</span></div> <div class="yiv3802462072qtdSeparateBR"><br><br></div><div class="yiv3802462072yahoo_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 Sunday, July 9, 2017 8:44 PM, Stephen Fordyce via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="yiv3802462072y_msg_container"><div id="yiv3802462072"><div><div dir="ltr"><div>Hi Hank,</div><div>I was under the impression your CNG spheres are composite/fibre-wrapped? I presume you're aware that using a model based on metal components wouldn't apply well to composite.</div><div><br clear="none"></div><div>I think I posted about it, but I've done a lot of research and some testing on using composite cylinders underwater and it's potentially a bit scary, especially with salt water. If anyone is interested I can go into more detail.</div><div><br clear="none"></div><div>Cheers,</div><div>Steve</div></div><div class="yiv3802462072gmail_extra"><br clear="none"><div class="yiv3802462072gmail_quote">On Mon, Jul 10, 2017 at 11:53 AM, hank pronk via Personal_Submersibles <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br clear="none"><blockquote class="yiv3802462072gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="yiv3802462072yqt8612899619" id="yiv3802462072yqt90275"><div><div 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="yiv3802462072m_-8062362793588594983yui_3_16_0_ym19_1_1499651473443_3360"><span>I use the calculator on Psubs written by Alec, it is </span>fabulous because you change the values for different materials. </div><div id="yiv3802462072m_-8062362793588594983yui_3_16_0_ym19_1_1499651473443_3361">Hank</div><div><div class="yiv3802462072h5"> <div class="yiv3802462072m_-8062362793588594983qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv3802462072m_-8062362793588594983yahoo_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 face="Arial" size="2"> On Sunday, July 9, 2017 7:17 PM, james cottrell via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv3802462072m_-8062362793588594983y_msg_container"><div id="yiv3802462072m_-8062362793588594983yiv0466071481"><div><div style="color:rgb(0,0,0);font-family:verdana, helvetica, sans-serif;font-size:13px;background-color:rgb(255,255,255);"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_9903"><span id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10050">I still think that a CNG sphere will go way deeper. How did you calculate that?</span></div><div class="yiv3802462072m_-8062362793588594983yiv0466071481qtdSeparateBR" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10051"><br clear="none"><br clear="none"></div><div class="yiv3802462072m_-8062362793588594983yiv0466071481yahoo_quoted" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10057" style="display:block;"> <div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10056" style="font-family:verdana, helvetica, sans-serif;font-size:13px;"> <div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10055" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv3802462072m_-8062362793588594983yiv0466071481yqt8784018445" id="yiv3802462072m_-8062362793588594983yiv0466071481yqt05911"><div dir="ltr" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10054"> <font id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10053" face="Arial" size="2"> </font><hr id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10052" size="1"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" 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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Sunday, July 9, 2017 4:38 PM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Pressure Test<br clear="none"> </div> <div class="yiv3802462072m_-8062362793588594983yiv0466071481y_msg_container" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10099"><br clear="none"><div id="yiv3802462072m_-8062362793588594983yiv0466071481"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10101"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10100" 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="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10111"><span>Very true.</span></div><div dir="ltr" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499630532547_20107"><span id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499630532547_20272">I do love the idea, but, weight is a real killer, every pound is super critical. If I go with a 7500 footer then the buoyancy is cheap because I will use CNG tanks, don't tell Sean ;-) Then it will be awesome to have it rotate, just think you can rotate so the port is pointing down between your feet.</span></div><div dir="ltr" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499630532547_20107"><span>Hank</span></div> <div class="yiv3802462072m_-8062362793588594983yiv0466071481qtdSeparateBR" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10102"><br clear="none"><br clear="none"></div><div class="yiv3802462072m_-8062362793588594983yiv0466071481yahoo_quoted" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10107" style="display:block;"> <div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10106" style="font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"> <div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10105" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv3802462072m_-8062362793588594983yiv0466071481yqt7033326313" id="yiv3802462072m_-8062362793588594983yiv0466071481yqt64388"><div dir="ltr" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10104"><font id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10103" face="Arial" size="2"> On Sunday, July 9, 2017 2:26 PM, james cottrell via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv3802462072m_-8062362793588594983yiv0466071481y_msg_container" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10110"><div id="yiv3802462072m_-8062362793588594983yiv0466071481"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10109"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10108" style="color:rgb(0,0,0);font-family:verdana, helvetica, sans-serif;font-size:13px;background-color:rgb(255,255,255);"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3575"><span id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3659">Yes....BUT...being able to get out on your own is never a bad thing.</span></div><div class="yiv3802462072m_-8062362793588594983yiv0466071481qtdSeparateBR" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3593"><br clear="none"><br clear="none"></div><div class="yiv3802462072m_-8062362793588594983yiv0466071481yahoo_quoted" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3669" style="display:block;"> <div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3668" style="font-family:verdana, helvetica, sans-serif;font-size:13px;"> <div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3667" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv3802462072m_-8062362793588594983yiv0466071481yqt3307982872" id="yiv3802462072m_-8062362793588594983yiv0466071481yqt91755"><div dir="ltr" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3666"> <font face="Arial" size="2"> </font><hr size="1"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" 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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Sunday, July 9, 2017 4:12 PM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Pressure Test<br clear="none"> </div> <div class="yiv3802462072m_-8062362793588594983yiv0466071481y_msg_container" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3673"><br clear="none"><div id="yiv3802462072m_-8062362793588594983yiv0466071481"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3672"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3671" 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="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3670"><span>Greg,</span></div><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499630532547_3250"><span id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499630532547_3249">That was my original plan, I think it is a great idea for a shallow diver. But if your going real deep then chances are it will be lowered into the water from a boat or barge, so need for the swivel. If I end up being less ambitious, and build an Elementary 7,500 I will do just that.</span></div><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499630532547_3250"><span>Hank</span></div> <div class="yiv3802462072m_-8062362793588594983yiv0466071481qtdSeparateBR" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499649104847_10187"><br clear="none"><br clear="none"></div><div class="yiv3802462072m_-8062362793588594983yiv0466071481yahoo_quoted" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3678" style="display:block;"> <div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3677" style="font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"> <div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3676" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv3802462072m_-8062362793588594983yiv0466071481yqt0270487542" id="yiv3802462072m_-8062362793588594983yiv0466071481yqt89970"><div dir="ltr" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3675"><font id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3674" face="Arial" size="2"> On Sunday, July 9, 2017 1:57 PM, james cottrell via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv3802462072m_-8062362793588594983yiv0466071481y_msg_container" id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3681"><div id="yiv3802462072m_-8062362793588594983yiv0466071481"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3680"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499631641198_3679" style="color:rgb(0,0,0);font-family:verdana, helvetica, sans-serif;font-size:13px;background-color:rgb(255,255,255);"><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499629315211_3150">Hank,</div><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499629315211_3150"><br clear="none"></div><div id="yiv3802462072m_-8062362793588594983yiv0466071481yui_3_16_0_ym19_1_1499629315211_3150">I was thinking that it might be possible to mount a sp</div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></blockquote></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></body></html>