<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> extropy-chat <extropy-chat-bounces@lists.extropy.org> <b>On Behalf Of </b>Adrian Tymes via extropy-chat<br><b>Sent:</b> Thursday, 13 June, 2024 6:56 AM<br><b>To:</b> ExI chat list <extropy-chat@lists.extropy.org><br><b>Cc:</b> Adrian Tymes <atymes@gmail.com><br><b>Subject:</b> Re: [ExI] vaccuum balloon in freon<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Thu, Jun 13, 2024 at 9:49 AM <<a href="mailto:spike@rainier66.com">spike@rainier66.com</a>> wrote:<o:p></o:p></p></div><div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>As a demonstration, he could float a pre-buoyant version of his idea in gaseous halocarbon C318:<o:p></o:p></p></div></div></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>>…Nice idea, but that would probably be more work and far more expense than just making one that floats in normal air.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>>…Setting up the vat itself would cost well over $100,000, right? That would make it more expensive.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>No I wouldn’t think it would be that expensive, because using C318 enables creation of a quarter scale model. It could be made with 2-meter on a side square panels, steel, welded seam. You would lower your balloon in there, pour in the liquid C318, the stuff boils, up it floats.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>You might be able to build something like that for in the 10k to 15k range if you have someone who is hot with a welder.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am visualizing it as an advertisement mechanism.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>spike<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></body></html>