<html><body><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="yui_3_16_0_1_1441656652134_2806"><span id="yui_3_16_0_1_1441656652134_2805">Hi Hank,</span></div><div dir="ltr" id="yui_3_16_0_1_1441656652134_2808"><span id="yui_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="yui_3_16_0_1_1441656652134_2813"><span id="yui_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="yui_3_16_0_1_1441656652134_2815"><span id="yui_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="yui_3_16_0_1_1441656652134_2815"><span id="yui_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="yui_3_16_0_1_1441656652134_2815"><span id="yui_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="yui_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="yui_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="yui_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="yui_3_16_0_1_1441656652134_2815">make than if it were done in metal.</div><div dir="ltr" id="yui_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="yui_3_16_0_1_1441656652134_2815">of resin to cloth making a differance.</div><div dir="ltr" id="yui_3_16_0_1_1441656652134_2815">Alan </div><div dir="ltr" id="yui_3_16_0_1_1441656652134_2815"><span><br></span></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1441656652134_2668"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1441656652134_2667"> <div dir="ltr" id="yui_3_16_0_1_1441656652134_2666"> <hr size="1" id="yui_3_16_0_1_1441656652134_2854"> <font size="2" face="Arial" id="yui_3_16_0_1_1441656652134_2872"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Tuesday, September 8, 2015 3:12 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] carbon fiber pressure vessel<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1441656652134_2785"><br><div id="yiv1970851238"><div id="yui_3_16_0_1_1441656652134_3257"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;" id="yui_3_16_0_1_1441656652134_3256"><div id="yiv1970851238yui_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="yiv1970851238yui_3_16_0_1_1441638662566_2748">Hank</div></div></div></div><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org" id="yui_3_16_0_1_1441656652134_2786">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" id="yui_3_16_0_1_1441656652134_3258">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></body></html>