Re: Successful flight by Blue Origin

From	jimp@specsol.spam.sux.com
Newsgroups	sci.space.policy, sci.physics, sci.astro, rec.arts.sf.science
Subject	Re: Successful flight by Blue Origin
Date	2016-04-08 23:13 +0000
Organization	A noiseless patient Spider
Message-ID	<miqltc-fb8.ln1@mail.specsol.com> (permalink)
References	(2 earlier) <ne1poe$5pr$2@dont-email.me> <ne3v51$216$1@newsreader4.netcologne.de> <MPG.316ffb6f5d1870c49899a6@news.eternal-september.org> <ne6675$moj$1@news.hpeswlab.net> <d53ggbdkh7rh268kiug7h5kpsoofgqd4e8@4ax.com>

Cross-posted to 4 groups.

Show all headers | View raw

In sci.physics Fred J. McCall <fjmccall@gmail.com> wrote:
> Rick Jones <rick.jones2@hpe.com> wrote:
> 
>>In sci.space.policy Jeff Findley <jfindley@cinci.nospam.rr.com> wrote:
>>> They're reasonable if they work.  SpaceX is trying to avoid adding
>>> other engines to the Falcon 9 first stage.  The stage could hover
>>> and land, for example, if it added Super Draco engines to the first
>>> stage.  But, they require different fuel and oxidizer than the first
>>> stage carries.  This would mean adding completely different tanks,
>>> plumbing, and etc.  for those engines.  Also, if Super Dracos were
>>> used, it would be advantageous to deplete the kerosene and then vent
>>> any remaining LOX in the tanks before landing.  So, any "leftover"
>>> fuel and oxidizer would be "wasted".  In my book, this would not be
>>> a good trade to make.
>>
>>If one wanted to give the Falcon 9 first stage the ability to hover,
>>wouldn't the most straightforward way to do that be create a
>>deeply-throttled Merlin?
>>
> 
> Straightforward, perhaps, but it's a very big design change so you
> start with having to requalify as if it's a whole new engine.
 
Yet you were just saying in another thread space stuff doesn't have
bureaucrat bullshit.
 

-- 
Jim Pennino

Thread

Re: Successful flight by Blue Origin "Robert Clark" <rgregoryclark@gmSPAMBLOACKail.com> - 2016-04-05 21:49 -0400
  Re: Successful flight by Blue Origin Thomas Koenig <tkoenig@netcologne.de> - 2016-04-06 21:30 +0000
    Re: Successful flight by Blue Origin Jeff Findley <jfindley@cinci.nospam.rr.com> - 2016-04-07 06:07 -0400
      Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-07 12:45 -0700
        Re: Successful flight by Blue Origin Thomas Womack <twomack@chiark.greenend.org.uk> - 2016-04-08 16:41 +0100
        Re: Successful flight by Blue Origin Jeff Findley <jfindley@cinci.nospam.rr.com> - 2016-04-08 18:27 -0400
      Re: Successful flight by Blue Origin Rick Jones <rick.jones2@hpe.com> - 2016-04-07 17:43 +0000
        Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-08 12:56 -0700
          Re: Successful flight by Blue Origin Jeff Findley <jfindley@cinci.nospam.rr.com> - 2016-04-08 18:26 -0400
            Re: Successful flight by Blue Origin "Robert Clark" <rgregoryclark@gmSPAMBLOACKail.com> - 2016-04-10 08:40 -0400
              Re: Successful flight by Blue Origin Jeff Findley <jfindley@cinci.nospam.rr.com> - 2016-04-11 06:11 -0400
                Re: Successful flight by Blue Origin "Greg \(Strider\) Moore" <mooregr@deletethisgreenms.com> - 2016-04-11 06:37 -0400
          Re: Successful flight by Blue Origin jimp@specsol.spam.sux.com - 2016-04-08 23:13 +0000
            Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-08 22:01 -0700
              Re: Successful flight by Blue Origin jimp@specsol.spam.sux.com - 2016-04-09 06:27 +0000
                Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-09 08:08 -0700
                Re: Successful flight by Blue Origin jimp@specsol.spam.sux.com - 2016-04-09 19:03 +0000
                Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-09 13:20 -0700
                Re: Successful flight by Blue Origin jimp@specsol.spam.sux.com - 2016-04-09 21:17 +0000
                Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-09 20:22 -0700
                Re: Successful flight by Blue Origin jimp@specsol.spam.sux.com - 2016-04-10 06:11 +0000
                Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-10 06:43 -0700
                Re: Successful flight by Blue Origin jimp@specsol.spam.sux.com - 2016-04-10 17:09 +0000
                Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-10 17:39 -0700
                Re: Successful flight by Blue Origin jimp@specsol.spam.sux.com - 2016-04-11 19:13 +0000
                Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-11 19:59 -0700
                Re: Successful flight by Blue Origin jimp@specsol.spam.sux.com - 2016-04-12 06:10 +0000
                Re: Successful flight by Blue Origin Fred J. McCall <fjmccall@gmail.com> - 2016-04-12 07:12 -0700
                Re: Successful flight by Blue Origin jimp@specsol.spam.sux.com - 2016-04-12 18:25 +0000

csiph-web