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Groups > rec.arts.sf.written > #492802
| From | "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> |
|---|---|
| Newsgroups | rec.arts.sf.written, rec.arts.sf.science, sci.space.policy, sci.physics |
| Subject | Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) |
| Date | 2018-06-03 04:17 -0400 |
| Organization | An east coast U.S. university |
| Message-ID | <pf0872$6qm$1@dont-email.me> (permalink) |
| References | (3 earlier) <t63ogdp69so3klmm0cpuc13k1gjq9lmrk6@4ax.com> <baiogdhtk5m4u385mlgdv530agvj8ce9tk@4ax.com> <vqtogdhisj5bl28visfpnhkoc2li07ggm0@4ax.com> <peldsf$haq$1@dont-email.me> <pes925$6i6$1@newsreader5.netcologne.de> |
Cross-posted to 4 groups.
++++++++++++++++++++++++++++++++++++++++++++++++ "Thomas Koenig" wrote in message news:pes925$6i6$1@newsreader5.netcologne.de... Robert Clark <rgregoryclark@gmSPAMBLOCKail.com> schrieb: >=========================================================== > "J. Clarke" wrote in message > news:vqtogdhisj5bl28visfpnhkoc2li07ggm0@4ax.com... > > On Mon, 28 May 2018 11:30:57 -0700, Fred J. McCall ><fjmccall@gmail.com> wrote: > > ... >>>>Note that SpaceX has already acknowledged that the Falcon 9 first stage >>>>and >>>>the BFR stages will have SSTO capability, but with small payload. >>> >>>Source? And I don't mean some throwaway comment or some blog post by >>>somebody who doesn't work for SpaceX. >>> >> >>Well, he's not exactly an employee but Elon Musk has said that a >>Falcon 9 Full Thrust first stage reaches (a very low) orbit on an >>expendable launch and that they deliberately give it a little boost >>back toward the ground so that it doesn't hang around up there for a >>month or two. > > Source? Other than a tweet? Well, one could try plugging the available numbers into the rocket equation. I've taken them from http://www.spaceflight101.net/falcon-9-v11.html (accuracy is probably debatable, plus the numbers are old, so a grain of salt is advised). Average specific impulse (in seconds, yech) could be a bit more than 300 s, let's say v_e = 3000 m/s effective exhaust velocity. m_full = 418.8 tons. m_empty = 23.1 tons. v_max = v_e * ln(m_full/m_empty) = 8700 m/s. Probably not quite enough, and certainly not useful (I've left out any payload and the aerodynamic nose cone). ++++++++++++++++++++++++++++++++++++++++++++++++++++++ The base F9 booster had a better mass ratio because it didn't have landing legs and other recovery add-ons that add significantly to the weight. In a 2012 lecture, Elon Musk at about the 30 minute mark, gave the propellant fraction of the non-reusable version of the F9 as in the range of 95.5% to 96%: Elon Musk lecture at the Royal Aeronautical Society. https://www.youtube.com/watch?v=lyjBGvYETmo From the transcript: [quote]Where SpaceX, I think, does quite well is in the mass ratio of the stages. We have a very good stage mass ratio that's, with the current version of Falcon 9, the first stage is around the 94% propellant by mass, and with the new design of Falcon 9 we're closer to 96%, maybe 95.5%, and with a slight improvement in ISP. The Merlin architecture is an open cycle architecture, so it doesn't have the ISP advantage of a staged combustion system, and it's using RP-1 so we're talking ISP for the first stage booster engine around 310 to 312 and, for the vacuum version, that's around 340 to 345. The penalty for an open cycle engine is much less in a vacuum than it is at sea level. So that's where we are. So, we definitely need a new engine for any kind of, sending people to Mars kind of stuff, but I think we can still get to full reusability with the current engines despite having a bit of an ISP disadvantage relative to say, the Russian kerosene based engines./[quote] http://shitelonsays.com/transcript/elon-musk-lecture-at-the-royal-aeronautical-society-2012-11-16 Bob Clark ------------------------------------------------------------------ Single-stage-to-orbit was already shown possible 50 years ago with the Titan II first stage. In fact, contrary to popular belief SSTO's are actually easy. Just use the most efficient engines and stages at the same time, and the result will automatically be SSTO. Blog: Http://Exoscientist.blogspot.com ------------------------------------------------------------------
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Life on Europa in scifi? "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-04-25 07:29 -0400
Re: Life on Europa in scifi? djheydt@kithrup.com (Dorothy J Heydt) - 2018-04-25 13:44 +0000
Re: Life on Europa in scifi? Lynn McGuire <lynnmcguire5@gmail.com> - 2018-04-25 14:34 -0500
Re: Life on Europa in scifi? Ninapenda Jibini <taustinca@gmail.com> - 2018-04-26 01:03 +0000
Re: Life on Europa in scifi? "Sea Wasp (Ryk E. Spoor)" <seawasp@sgeinc.invalid.com> - 2018-04-25 21:22 -0400
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-04-25 14:44 -0700
Re: Life on Europa in scifi? Steve Dodds <sdodds@nova-optical.com> - 2018-04-25 16:04 -0600
Re: Life on Europa in scifi? William Elliot <marsh@panix.com> - 2018-04-25 21:22 -0700
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-26 18:27 +1200
Re: Life on Europa in scifi? David Johnston <davidjohnston29@yahoo.com> - 2018-04-26 08:56 -0600
Re: Life on Europa in scifi? Thomas Koenig <tkoenig@netcologne.de> - 2018-04-27 05:32 +0000
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-27 18:40 +1200
Re: Life on Europa in scifi? Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-04-27 08:04 -0700
Re: Life on Europa in scifi? Robert Woodward <robertaw@drizzle.com> - 2018-04-27 09:48 -0700
Re: Life on Europa in scifi? Lynn McGuire <lynnmcguire5@gmail.com> - 2018-04-27 12:52 -0500
Re: Life on Europa in scifi? Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-04-27 11:02 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-27 22:11 -0400
Re: Life on Europa in scifi? Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-04-30 09:22 -0700
Re: Life on Europa in scifi? Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-04-27 11:01 -0700
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-04-27 11:48 -0700
Re: Life on Europa in scifi? Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-04-27 12:45 -0700
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-04-27 13:06 -0700
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-28 09:37 +1200
Re: Life on Europa in scifi? Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-04-27 15:17 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-27 22:12 -0400
Re: Life on Europa in scifi? Ninapenda Jibini <taustinca@gmail.com> - 2018-04-28 05:47 +0000
Re: Life on Europa in scifi? Kevrob <kevrob@my-deja.com> - 2018-04-28 07:47 -0700
Re: Life on Europa in scifi? Ninapenda Jibini <taustinca@gmail.com> - 2018-04-28 19:15 +0000
Re: Life on Europa in scifi? Kevrob <kevrob@my-deja.com> - 2018-04-28 13:11 -0700
Re: Life on Europa in scifi? Greg Goss <gossg@gossg.org> - 2018-04-29 09:24 -0600
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-29 11:28 -0400
Re: Life on Europa in scifi? "Default User" <defaultuserbr@yahoo.com> - 2018-04-30 00:16 +0000
Re: Life on Europa in scifi? Paul Colquhoun <newsposter@andor.dropbear.id.au> - 2018-04-27 18:01 +1000
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-28 12:32 +1200
Re: Life on Europa in scifi? David Johnston <davidjohnston29@yahoo.com> - 2018-04-27 20:06 -0600
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-27 22:07 -0400
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-28 14:26 +1200
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-28 00:49 -0400
Re: Life on Europa in scifi? David DeLaney <daviddelaney@earthlink.net> - 2018-04-29 04:01 -0500
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-29 09:16 -0400
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-04-28 05:36 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-28 09:51 -0400
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-04-28 10:59 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-28 15:15 -0400
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-04-28 13:37 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-27 22:05 -0400
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-28 14:28 +1200
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-28 00:50 -0400
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-28 18:37 +1200
Re: Life on Europa in scifi? David Johnston <davidjohnston29@yahoo.com> - 2018-04-28 01:05 -0600
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-04-28 09:25 -0700
Re: Life on Europa in scifi? Ninapenda Jibini <taustinca@gmail.com> - 2018-04-28 19:13 +0000
Re: Life on Europa in scifi? Paul Colquhoun <newsposter@andor.dropbear.id.au> - 2018-04-29 11:18 +1000
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-29 17:04 +1200
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-04-28 23:24 -0700
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-29 19:20 +1200
Re: Life on Europa in scifi? David Johnston <davidjohnston29@yahoo.com> - 2018-04-29 01:43 -0600
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-04-29 10:21 -0700
Re: Life on Europa in scifi? Thomas Koenig <tkoenig@netcologne.de> - 2018-04-29 18:11 +0000
Re: Life on Europa in scifi? Cryptoengineer <treifamily@gmail.com> - 2018-04-29 18:57 -0500
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-29 20:18 -0400
Re: Life on Europa in scifi? Titus G <noone@nowhere.com> - 2018-04-30 15:02 +1200
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-30 14:19 +1200
Re: Life on Europa in scifi? Paul Colquhoun <newsposter@andor.dropbear.id.au> - 2018-04-30 13:21 +1000
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-04-30 18:15 +1200
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-04-29 23:17 -0700
Re: Life on Europa in scifi? Thomas Koenig <tkoenig@netcologne.de> - 2018-05-01 00:05 +0000
Re: Life on Europa in scifi? Christian Weisgerber <naddy@mips.inka.de> - 2018-05-01 15:33 +0000
Re: Life on Europa in scifi? mvp@web1.calweb.com (Mike Van Pelt) - 2018-05-01 19:00 +0000
Re: Life on Europa in scifi? Christian Weisgerber <naddy@mips.inka.de> - 2018-05-01 20:09 +0000
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-04-30 00:28 -0700
Re: Life on Europa in scifi? David DeLaney <daviddelaney@earthlink.net> - 2018-04-30 03:37 -0500
Re: Life on Europa in scifi? David Johnston <davidjohnston29@yahoo.com> - 2018-04-30 10:07 -0600
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-04-30 14:53 -0700
Re: Life on Europa in scifi? Peter Trei <petertrei@gmail.com> - 2018-04-30 11:46 -0700
Re: Life on Europa in scifi? Gene Wirchenko <genew@telus.net> - 2018-04-30 11:29 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-30 20:48 -0400
Re: Life on Europa in scifi? Gene Wirchenko <genew@telus.net> - 2018-05-01 11:10 -0700
Re: Life on Europa in scifi? Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-05-01 11:18 -0700
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-05-01 15:30 -0700
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-05-02 18:21 +1200
Re: Life on Europa in scifi? Chris Buckley <alan@sabir.com> - 2018-05-02 12:09 +0000
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-05-02 07:45 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-05-02 19:16 -0400
Re: Life on Europa in scifi? Greg Goss <gossg@gossg.org> - 2018-05-02 19:54 -0600
Re: Life on Europa in scifi? Ninapenda Jibini <taustinca@gmail.com> - 2018-05-03 03:24 +0000
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-05-03 18:22 +1200
Re: Life on Europa in scifi? Peter Trei <petertrei@gmail.com> - 2018-05-03 06:16 -0700
Re: Life on Europa in scifi? D B Davis <g@crcomp.net> - 2018-05-03 14:47 +0000
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-05-03 09:30 -0700
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-05-04 09:03 +1200
Re: Life on Europa in scifi? David Johnston <davidjohnston29@yahoo.com> - 2018-05-03 15:17 -0600
Re: Life on Europa in scifi? Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-05-03 14:52 -0700
Re: Life on Europa in scifi? Paul Colquhoun <newsposter@andor.dropbear.id.au> - 2018-05-04 08:42 +1000
Re: Life on Europa in scifi? David DeLaney <daviddelaney@earthlink.net> - 2018-05-03 21:09 -0500
Re: Life on Europa in scifi? Gene Wirchenko <genew@telus.net> - 2018-05-03 20:49 -0700
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-05-04 18:05 +1200
Re: Life on Europa in scifi? Peter Trei <petertrei@gmail.com> - 2018-05-04 06:25 -0700
Re: Life on Europa in scifi? David DeLaney <daviddelaney@earthlink.net> - 2018-05-04 22:06 -0500
Re: Life on Europa in scifi? Thomas Koenig <tkoenig@netcologne.de> - 2018-05-04 06:09 +0000
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-05-04 18:39 +1200
Re: Life on Europa in scifi? Peter Trei <petertrei@gmail.com> - 2018-05-04 06:29 -0700
Re: Life on Europa in scifi? Gene Wirchenko <genew@telus.net> - 2018-05-04 15:21 -0700
Re: Life on Europa in scifi? Your Name <YourName@YourISP.com> - 2018-05-05 11:31 +1200
Re: Life on Europa in scifi? David Johnston <davidjohnston29@yahoo.com> - 2018-05-04 18:56 -0600
Re: Life on Europa in scifi? Titus G <noone@nowhere.com> - 2018-05-05 16:01 +1200
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-05-05 02:55 -0700
Re: Life on Europa in scifi? Robert Woodward <robertaw@drizzle.com> - 2018-05-05 10:14 -0700
Re: Life on Europa in scifi? David Johnston <davidjohnston29@yahoo.com> - 2018-05-05 11:46 -0600
Re: Life on Europa in scifi? Greg Goss <gossg@gossg.org> - 2018-05-05 19:10 -0600
Re: Life on Europa in scifi? David DeLaney <daviddelaney@earthlink.net> - 2018-05-06 19:17 -0500
Re: Life on Europa in scifi? Gene Wirchenko <genew@telus.net> - 2018-05-01 22:39 -0700
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-05-01 13:29 -0700
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-05-01 15:32 -0700
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-05-02 13:49 -0700
Re: Life on Europa in scifi? Dimensional Traveler <dtravel@sonic.net> - 2018-05-02 14:44 -0700
Re: Life on Europa in scifi? Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-05-02 15:13 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-05-02 19:05 -0400
Re: Life on Europa in scifi? Peter Trei <petertrei@gmail.com> - 2018-05-03 06:06 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-05-01 19:45 -0400
Re: Life on Europa in scifi? Quadibloc <jsavard@ecn.ab.ca> - 2018-06-01 19:29 -0700
Re: Life on Europa in scifi? Kevrob <kevrob@my-deja.com> - 2018-06-01 19:50 -0700
Re: Life on Europa in scifi? Thomas Koenig <tkoenig@netcologne.de> - 2018-04-29 18:05 +0000
Re: Life on Europa in scifi? Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2018-04-28 22:14 +0200
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-04-29 12:39 -0400
Re: Life on Europa in scifi? "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-05-28 07:19 -0400
Re: Life on Europa in scifi? Fred J. McCall <fjmccall@gmail.com> - 2018-05-28 05:38 -0700
Re: Life on Europa in scifi? Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-05-28 10:40 -0400
Re: Life on Europa in scifi? Fred J. McCall <fjmccall@gmail.com> - 2018-05-28 11:36 -0700
Re: Life on Europa in scifi? Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-05-29 06:19 -0400
Re: Life on Europa in scifi? Fred J. McCall <fjmccall@gmail.com> - 2018-05-30 01:08 -0700
Re: Life on Europa in scifi? Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-05-30 06:30 -0400
Re: Life on Europa in scifi? Fred J. McCall <fjmccall@gmail.com> - 2018-05-30 15:00 -0700
Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-05-28 13:28 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-05-28 13:35 -0400
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-05-28 10:27 -0400
Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-05-28 14:03 -0400
Re: Life on Europa in scifi? Fred J. McCall <fjmccall@gmail.com> - 2018-05-28 11:30 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-05-28 18:00 -0400
Re: Life on Europa in scifi? Fred J. McCall <fjmccall@gmail.com> - 2018-05-28 23:39 -0700
Re: Life on Europa in scifi? J. Clarke <jclarke.873638@gmail.com> - 2018-05-29 02:59 -0400
Re: Life on Europa in scifi? Fred J. McCall <fjmccall@gmail.com> - 2018-05-29 03:07 -0700
Re: Life on Europa in scifi? Alain Fournier <alain245@videotron.ca> - 2018-05-29 07:10 -0400
Re: Life on Europa in scifi? Robert Carnegie <rja.carnegie@excite.com> - 2018-05-29 14:36 -0700
Re: Life on Europa in scifi? Fred J. McCall <fjmccall@gmail.com> - 2018-05-30 01:11 -0700
Once into the breach: SSTO's (was more Re: Life on Europa in scifi?) "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-05-30 01:46 -0400
Re: Once into the breach: SSTO's (was more Re: Life on Europa in scifi?) Thomas Koenig <tkoenig@netcologne.de> - 2018-06-01 20:07 +0000
Re: Once into the breach: SSTO's (was more Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-01 22:51 -0400
Re: Once into the breach: SSTO's (was more Re: Life on Europa in scifi?) Thomas Koenig <tkoenig@netcologne.de> - 2018-06-02 16:19 +0000
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-06-03 04:17 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-03 04:38 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-03 01:58 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-03 05:10 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Lawrence Watt-Evans <misenchantedpress@gmail.com> - 2018-06-03 14:01 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-03 14:06 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-03 17:59 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-03 16:12 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-03 19:54 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-04 00:41 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Dimensional Traveler <dtravel@sonic.net> - 2018-06-03 19:36 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-04 01:00 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Dimensional Traveler <dtravel@sonic.net> - 2018-06-04 07:32 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Alan Baker <nunya@ness.biz> - 2018-06-04 09:13 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-04 16:08 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-04 19:37 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-05 07:25 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-05 13:39 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-06 06:44 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-05 20:55 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-05 22:59 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Ninapenda Jibini <taustinca@gmail.com> - 2018-06-06 06:20 +0000
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-06 02:09 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-06-06 10:09 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-06 07:00 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jibini Kula Tumbili Kujisalimisha <taustinca@gmail.com> - 2018-06-06 10:24 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-06 06:50 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-06 20:54 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-06 18:16 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Thomas Koenig <tkoenig@netcologne.de> - 2018-06-06 06:21 +0000
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-06 02:14 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-06 07:08 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Thomas Koenig <tkoenig@netcologne.de> - 2018-06-07 16:42 +0000
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-07 12:26 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-06-10 20:16 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-10 20:13 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) "Robert Clark" <rgregoryclark@gmSPAMBLOACKail.com> - 2018-07-11 16:12 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) scott@slp53.sl.home (Scott Lurndal) - 2018-06-04 15:40 +0000
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-04 16:11 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) hamish.laws@gmail.com - 2018-06-03 16:47 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Thomas Koenig <tkoenig@netcologne.de> - 2018-06-03 10:29 +0000
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-03 09:25 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-03 14:21 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-03 18:19 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-03 16:15 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-03 19:55 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-04 00:44 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-06-17 09:30 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-17 16:55 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) J. Clarke <jclarke.873638@gmail.com> - 2018-06-17 16:59 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Greg Goss <gossg@gossg.org> - 2018-06-17 19:29 -0600
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Fred J. McCall <fjmccall@gmail.com> - 2018-06-18 00:01 -0700
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-19 06:58 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-06-21 16:34 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-22 07:30 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-06-23 14:05 -0400
Re: Once more into the breach: SSTO's (was Re: Life on Europa in scifi?) JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-23 17:22 -0400
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