Re: Towards routine, reusable space launch.

From	Alain Fournier <alain245@videotron.ca>
Newsgroups	sci.space.policy, sci.physics, rec.arts.sf.science
Subject	Re: Towards routine, reusable space launch.
Date	2018-06-22 19:58 -0400
Organization	A noiseless patient Spider
Message-ID	<pgk2fi$vhc$1@dont-email.me> (permalink)
References	(13 earlier) <p2rlid5durbqhpkvqvg6k6psamg0al0bbg@4ax.com> <MPG.35954778b94bbec1989add@news.eternal-september.org> <ilRWC.464537$nq5.135927@fx36.iad> <MPG.3596a4f3ed38eab9989ade@news.eternal-september.org> <G5eXC.366112$bS4.257372@fx01.iad>

Cross-posted to 3 groups.

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On Jun/22/2018 à 5:45 PM, JF Mezei Wrote :
> On 2018-06-22 07:18, Jeff Findley wrote:
> 
>> Because it's flexible, duh.  Imagine that you took 10 meters of fishing
>> line with a weight at the bottom then cut it in the middle.  Would it
>> stay straight as it fell?  Try it!
> 
> 
> This does not consider/test the issue that the top of the cable is
> travelling at faster speed and as it is being pulled down, will
> accelerate further.  If the top of the cable wants to travel faster than
> the bottom part of cable, a tension will exist which would not exist in
> your fishing line example, and that tension should keep the cable straight.

That tension you talk about is caused by the centrifugal pseudo-force. 
In the fishing line example Jeff gave there is the gravitational force 
that should pull the line down.

In both cases, when the fishing line or the elevator cable snaps the 
elasticity pulls back with more force than the gravity or centrifugal 
force. With the caveat that we don't know what material would be used 
for the hypothetical space elevator, so we don't know how elastic it 
would be. But I think it is a safe assumption that if such an elevator 
was to ever be built, the material would be sufficiently elastic for 
tens of thousands of kilo-meters of it to give a very strong pull back.

Alain Fournier

Thread

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. dumpster4@hotmail.com - 2018-06-07 16:14 -0700
  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. Sergio <invalid@invalid.com> - 2018-06-08 08:31 -0500
    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. "Scott M. Kozel" <kozelsm@comcast.net> - 2018-06-11 03:19 -0700
            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. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-13 16:28 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-13 14:38 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-14 05:22 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-14 15:44 -0400
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-15 07:52 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-15 21:33 -0400
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-16 10:38 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-16 17:51 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-17 02:16 -0700
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-17 15:49 -0400
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-17 16:52 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-18 02:44 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-18 00:05 -0700
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-18 14:27 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-18 19:39 -0700
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-17 18:26 -0700
                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. frank.scrooby@gmail.com - 2018-06-14 01:24 -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. "Scott M. Kozel" <kozelsm@comcast.net> - 2018-06-20 19:02 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-21 06:22 -0400
                Re: Towards routine, reusable space launch. "Greg \(Strider\) Moore" <mooregr@deletethisgreenms.com> - 2018-06-21 09:16 -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. "Scott M. Kozel" <kozelsm@comcast.net> - 2018-06-21 04:23 -0700
                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. bobjenkins166@gmail.com - 2018-08-20 15:47 -0700
                Re: Towards routine, reusable space launch. Alain Fournier <alain245@videotron.ca> - 2018-08-20 19:37 -0400
                Re: Towards routine, reusable space launch. Bob Jenkins <bob_jenkins@burtleburtle.net> - 2018-08-21 11:23 -0700
                Re: Towards routine, reusable space launch. Bob Jenkins <bob_jenkins@burtleburtle.net> - 2018-08-22 10:43 -0700
                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. "Scott M. Kozel" <kozelsm@comcast.net> - 2018-06-23 21:28 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-24 10:36 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-24 13:24 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-24 13:19 -0700
                Re: Towards routine, reusable space launch. "Scott M. Kozel" <kozelsm@comcast.net> - 2018-06-24 21:31 -0700
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-25 01:50 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-25 07:15 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-25 12:48 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-25 11:31 -0700
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-25 18:29 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-25 15:53 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-25 21:19 -0400
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-26 00:55 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-25 22:09 -0700
                Re: Towards routine, reusable space launch. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2018-06-26 03:49 -0400
                Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-26 03:58 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-26 07:29 -0400
                Re: Towards routine, reusable space launch. "Scott M. Kozel" <kozelsm@comcast.net> - 2018-06-26 14:14 -0700
                Re: Towards routine, reusable space launch. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-26 21:09 -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. 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. Sergio <invalid@invalid.com> - 2018-06-11 14:02 -0500
                Re: Towards routine, reusable space launch. benj <benj@nobody.net> - 2018-06-11 17:23 -0400
                Re: Towards routine, reusable space launch. Sergio <invalid@invalid.com> - 2018-06-11 21:20 -0500
                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. Doc O'Leary  <droleary@2017usenet1.subsume.com> - 2018-06-12 15:20 +0000
                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. Jeff Findley <jfindley@cinci.nospam.rr.com> - 2018-06-13 06:41 -0400
            Re: Towards routine, reusable space launch. Fred J. McCall <fjmccall@gmail.com> - 2018-06-13 14:36 -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

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