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Re: Towards routine, reusable space launch.

From willner@cfa.harvard.edu (Steve Willner)
Newsgroups rec.arts.sf.science, sci.astro, sci.physics, sci.space.policy
Subject Re: Towards routine, reusable space launch.
Date 2018-06-15 18:59 +0000
Organization Harvard-Smithsonian Center for Astrophysics
Message-ID <pg129r$5ll$1@dont-email.me> (permalink)
References (8 earlier) <7sguhdp3btbbbs83nm5la7lrl7vgg1j6a8@4ax.com> <pfon5t$9p8$1@dont-email.me> <rqe0idpd5fvuh1k50f8f1e88ji18sqj6ff@4ax.com> <pfpn9a$ss8$1@dont-email.me> <cs91idhasmjd9qbdhmk4qajkgr1u3jp7fg@4ax.com>

Cross-posted to 4 groups.

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> >The [JWST] telescope is folded, not only the solar arrays.

In particular the 6.5-m primary mirror is folded as well as many
other pieces.  It's frightening to watch the deployment videos.

In article <cs91idhasmjd9qbdhmk4qajkgr1u3jp7fg@4ax.com>,
 Fred J. McCall <fjmccall@gmail.com> writes:
> And THAT is because you cannot make a single mirror that large to
> adequate precision,

At least three observatories with seven telescopes in active use will
be surprised to learn that.  Not to mention additional ones planned.

Every JWST presentation I've seen that mentioned the subject said
that using a deployable (folding) mirror is because the Ariane 5
shroud is too small to fit a 6.5-m mirror.  I wouldn't be surprised
if there are "black" programs with the same difficulty.

That said, this particular use case doesn't necessarily justify a
rockoon approach, which will be difficult at best for large boosters.

-- 
Help keep our newsgroup healthy; please don't feed the trolls.
Steve Willner            Phone 617-495-7123     swillner@cfa.harvard.edu
Cambridge, MA 02138 USA

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Towards routine, reusable space launch. "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-06-07 16:24 -0400
  Re: Towards routine, reusable space launch. "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-06-07 16:47 -0400
  Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-07 23:24 -0700
  Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-08 13:10 +0000
    Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-08 20:47 -0700
      Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-09 17:19 +0000
        Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-09 16:02 -0400
          Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-11 03:16 +0000
            Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-10 23:19 -0500
            Re: Towards routine, reusable space launch. Thomas Koenig <tkoenig@netcologne.de> - 2018-06-11 05:25 +0000
              Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-11 22:18 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-11 20:52 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-12 06:34 -0400
                Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-12 14:36 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-12 14:29 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-12 19:00 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-13 02:15 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-13 01:27 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-13 06:46 -0400
                Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-13 12:57 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-13 14:35 -0700
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-13 17:55 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-13 21:44 -0700
                Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-14 22:02 +0000
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-13 19:39 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-13 21:53 -0700
                Re: Towards routine, reusable space launch. Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2018-06-14 15:15 +0200
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-14 06:32 -0700
                Re: Towards routine, reusable space launch. mvp@web1.calweb.com (Mike Van Pelt) - 2018-06-14 22:26 +0000
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-14 19:46 -0400
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-15 07:56 -0400
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-15 19:21 -0400
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-15 19:18 -0500
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-15 21:05 -0400
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-16 10:06 -0400
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-16 13:21 -0400
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-16 13:57 -0400
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-16 14:19 -0400
                Re: Towards routine, reusable space launch. mvp@web1.calweb.com (Mike Van Pelt) - 2018-06-19 18:38 +0000
                Re: Towards routine, reusable space launch. Greg Goss <gossg@gossg.org> - 2018-06-19 21:27 -0600
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-15 22:13 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-15 20:34 -0700
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-16 09:54 -0400
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-18 13:45 -0500
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-18 21:06 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-18 20:00 -0700
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-19 19:45 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-19 22:12 -0400
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-20 20:21 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-20 17:13 -0700
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-20 20:34 -0400
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-21 06:26 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-21 13:35 -0400
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-21 20:57 -0400
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-21 23:22 -0500
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-22 07:18 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-22 17:45 -0400
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-22 19:58 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-23 03:39 -0400
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-23 08:38 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-23 17:18 -0400
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-23 09:58 -0400
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-24 00:53 -0500
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-23 08:34 -0400
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-18 22:17 -0500
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-19 00:45 -0700
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-19 15:58 -0500
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-19 14:38 -0700
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-20 15:42 -0500
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-20 16:58 -0400
                Re: Towards routine, reusable space launch. Thomas Koenig <tkoenig@netcologne.de> - 2018-06-25 20:44 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-20 17:07 -0700
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-21 23:24 -0500
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-21 21:38 -0700
                Re: Towards routine, reusable space launch. Greg Goss <gossg@gossg.org> - 2018-06-19 21:35 -0600
                Re: Towards routine, reusable space launch. Thomas Koenig <tkoenig@netcologne.de> - 2018-06-19 17:01 +0000
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-21 22:39 -0500
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-14 04:47 -0400
            Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-11 04:00 -0700
              Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-11 22:35 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-11 20:58 -0700
                Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-12 15:00 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-12 14:36 -0700
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-06-12 20:08 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-12 22:12 -0700
                Re: Towards routine, reusable space launch. willner@cfa.harvard.edu (Steve Willner) - 2018-06-15 18:59 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-15 12:13 -0700
                Re: Towards routine, reusable space launch. willner@cfa.harvard.edu (Steve Willner) - 2018-06-18 20:36 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-18 19:57 -0700
                Re: Towards routine, reusable space launch. willner@cfa.harvard.edu (Steve Willner) - 2018-06-25 21:17 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-25 15:52 -0700
            Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-11 07:49 -0400
              Re: Towards routine, reusable space launch. Thomas Koenig <tkoenig@netcologne.de> - 2018-06-11 16:36 +0000
                Re: Towards routine, reusable space launch. Greg Goss <gossg@gossg.org> - 2018-06-11 19:38 -0600
              Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-11 22:50 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-11 21:03 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-12 06:44 -0400
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-12 09:57 -0500
                Re: Towards routine, reusable space launch. benj <benj@nobody.net> - 2018-06-12 17:52 -0400
                Re: Towards routine, reusable space launch. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-12 15:20 +0000
                Re: Towards routine, reusable space launch. David Ellis <daellis94@gmail.com> - 2018-06-12 11:30 -0700
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-12 14:47 -0700
                Re: Towards routine, reusable space launch. Thomas Koenig <tkoenig@netcologne.de> - 2018-06-12 19:43 +0000
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-12 14:52 -0700
        Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-12 16:05 -0700
    Re: Towards routine, reusable space launch. Greg Goss <gossg@gossg.org> - 2018-06-09 09:34 -0600
      Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-09 15:56 -0400
  Re: Towards routine, reusable space launch. "Robert Clark" <rgregoryclark@gmSPAMBLOCKail.com> - 2018-06-08 18:06 -0400
  Re: Towards routine, reusable space launch. frank.scrooby@gmail.com - 2018-06-20 23:45 -0700
    Re: Towards routine, reusable space launch. Thomas Koenig <tkoenig@netcologne.de> - 2018-06-25 21:02 +0000

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