<html><body><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_1441658188558_3219"><span>Alan,</span></div><div id="yui_3_16_0_1_1441658188558_3219"><span id="yui_3_16_0_1_1441658188558_3274">Yes have been reading today and it is tricky alright. Not for the do it yourself guy! </span></div><div id="yui_3_16_0_1_1441658188558_3219"><span>Hank</span></div> <br><div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <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, September 7, 2015 2:28 PM, Alan James via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br> </font> </div> <br><br> <div class="y_msg_container"><div id="yiv6327109009"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2806"><span id="yiv6327109009yui_3_16_0_1_1441656652134_2805">Hi Hank,</span></div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2808"><span id="yiv6327109009yui_3_16_0_1_1441656652134_2807">I looked at carbon fibre a number of years ago. At the time I found that there were other fiberglass / resin</span></div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2813"><span id="yiv6327109009yui_3_16_0_1_1441656652134_2812">combinations that were just as strong under compression. I think epoxy / e-glass </span>is one I looked at. </div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815"><span id="yiv6327109009yui_3_16_0_1_1441656652134_3201">If you found a commercially made vessel similar to the shape of a sub, you would still have to make</span></div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815"><span id="yiv6327109009yui_3_16_0_1_1441656652134_2946">through hulls & holes for view ports that would need reinforcing. So you would need to add additional</span></div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815"><span id="yiv6327109009yui_3_16_0_1_1441656652134_3017">thickness to the original structure & hope your addition bonded well. Some resins rely on chemical bonding,</span></div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815">so any reinforcements would need to be done at the same time as the hull was layed up.</div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815">Graham hawk made a fiberglass sub (I think carbon fiber) it was a pretty complex proceedure.</div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815">I remember Phil saying he made something in fiberglass, possibly a Newt suit, & that it cost 5x as much to</div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815">make than if it were done in metal.</div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815">Additionally it would be hard for an amateur to analize for strength. The direction of the weave & proportion</div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815">of resin to cloth making a differance.</div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815">Alan </div><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2815"><span><br clear="none"></span></div><br clear="none"> <div id="yiv6327109009yui_3_16_0_1_1441656652134_2668" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div id="yiv6327109009yui_3_16_0_1_1441656652134_2667" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv6327109009yqt1453666352" id="yiv6327109009yqt98103"><div dir="ltr" id="yiv6327109009yui_3_16_0_1_1441656652134_2666"> <hr id="yiv6327109009yui_3_16_0_1_1441656652134_2854" size="1"> <font id="yiv6327109009yui_3_16_0_1_1441656652134_2872" size="2" face="Arial"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Tuesday, September 8, 2015 3:12 AM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> [PSUBS-MAILIST] carbon fiber pressure vessel<br clear="none"> </font> </div> <div class="yiv6327109009y_msg_container" id="yiv6327109009yui_3_16_0_1_1441656652134_2785"><br clear="none"><div id="yiv6327109009"><div id="yiv6327109009yui_3_16_0_1_1441656652134_3257"><div id="yiv6327109009yui_3_16_0_1_1441656652134_3256" style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"><div id="yiv6327109009yui_3_16_0_1_1441638662566_2748">There are some pretty amazing carbon fibre pressure vessels out there. Has anyone looked at a carbon fibre sphere as an occupant sphere.</div><div id="yiv6327109009yui_3_16_0_1_1441638662566_2748">Hank</div></div></div></div><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" id="yiv6327109009yui_3_16_0_1_1441656652134_2786" 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" id="yiv6327109009yui_3_16_0_1_1441656652134_3258" 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><br><div class="yqt1453666352" id="yqt39490">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>