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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><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-<o:p></o:p></p></div></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;margin-right:.5in;mso-margin-bottom-alt:auto'>I do miss the focused subgroups. Those things were so intense and worthwhile in their way. We had them on single-state-to-orbit, guns, openness vs privacy, lots of math ones including one that I think led to BlockChain and BitCoin.<o:p></o:p></p></div></div></div></blockquote><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;margin-right:.5in;mso-margin-bottom-alt:auto;margin-left:.5in'>>spike<o:p></o:p></p></div></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>>…Single stage?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Dan <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>{8^D<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Ja, single STAGE to orbit, sheesh, my fat fingers.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We had a good SSTO group going for a while back in the days when that was still a real possibility. I was in the school of thought which held (and still hold) that anything you can do with one stage can be done better with two.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We were doing actual calculations in those days, lotta smart aerospace guys joining, some who weren’t ever part of ExI-chat, proposing designs and such. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Fully-recoverable two-stage is a good solution to a very difficult problem. Keith might have other thoughts, as I vaguely recall he was in on the chatter back in those days. I was more active on that one than any of the others, and it was mostly before I did much of anything on ExI.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In retrospect… I don’t even know if that group started out on ExI. It might have pre-dated this list and just had a lot of ExI guys on it. Eh, memories from over 25 yrs ago are not reliable.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Keith do you remember an email group with about 30-40 guys kicking around SSTO ideas? Who were the others? It was in about early 90s, and I still have my handwritten notebooks from those days, somewhere. I don’t know where they are, but I know I didn’t throw them out.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>spike<o:p></o:p></p></div></div></body></html>