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Re: Imagine the first landing strip on the moon

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On Wednesday, August 5, 2015 at 11:42:45 PM UTC-5, Thomas Heger wrote:
> Am 05.08.2015 15:35, schrieb Bohuš Matuška:
> > Thomas Heger wrote:
> >
> >> Am 04.08.2015 17:14, schrieb Bohuš Matuška:
> >>> Thomas Heger wrote:
> >>>
> >>>> That is something, you definitely don't like, since the main engine
> >>>> should point into the direction you are flying to. So, without
> >>>> prevention of such rotation you could not land.
> >>>
> >>> Quite difficult to land and control a quadcopter with a joystick, lots
> >>> of buttons and a central processing unit. Ie
> >>>
> >>> http://www.quadhangar.com/how-to-correct-a-drifting-quadcopter/
> >>>
> >>> I have no idea how they did it at that time, just by looking out of a
> >>> window. I could not  do it, that's for sure.
> >>
> >>
> >> "How a gyroscope guides a rocket"
> >> https://www.youtube.com/watch?v=KToggTKa9Lk
> >>
> >> http://www.npcap.ru/en/main-directions-of-activity/inertial-control-
> > systems/creation-of-inertial-control-systems/development-of-inertial-
> > measuring-devices-and-systems/
> >>
> >> http://www.clavius.org/techsteer.html
> >
> > Didn't look, but quadcopter are felt with all kind of sensors as well,
> > including 3d gyros, accelerometers and magnetic sensors.
> >
> 
> Such model copters are actually a good example for the problems of rocketry.
> 
> The first landers had  gyroscopes to guide the crafts.
> 
> First use of gyroscopes was in the rocket 'V2', build by Germans under 
> direction of Wernher von Braun. He was also the head of  the 'Apollo' 
> program of the NASA, hence we can safely assume, he would use gyroscopes 
> if necessary.
> 
> Those Apollo landers had only one engine, hence the deceleration is 
> similar to balance a broom-stick on an ascending rocket. (certainly 
> difficult)
> 
> The other problems are:
> 
> a LOT of fuel is required
> 
> the velocity should be zero (vertically and horizontal)  exactly at 
> surface level (not a few meters above or below).
> 
> the landing zone has influence on the subsequent rendezvous, hence it is 
> important to manage to land at a certain spot.
> 
> All of the tasks are interwoven, since e.g. corrections would require 
> time and that would make the lander land somewhere else. It would also 
> consume fuel.
> 
> To figure out the various consequences of a certain activity would 
> require a fast calculator, who could do such calculations several times 
> per second.
> 
> 
> TH

Here's a moon nerd joke.  If landing on the moon is too harmful for mankind then why don't we just land on its' dark side?

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Re: Imagine the first landing strip on the moon wobbly <wobbly@dont-email.me> - 2015-07-28 22:20 +0000
  Re: Imagine the first landing strip on the moon Thomas Heger <ttt_heg@web.de> - 2015-07-29 03:14 +0200
    Re: Imagine the first landing strip on the moon Thomas Heger <ttt_heg@web.de> - 2015-07-30 22:38 +0200
      Re: Imagine the first landing strip on the moon wobbly <wobbly@dont-email.me> - 2015-08-02 17:02 +0000
        Re: Imagine the first landing strip on the moon kefischer <emoneyjoe@iglou.com> - 2015-08-02 14:40 -0400
          Re: Imagine the first landing strip on the moon Thomas Heger <ttt_heg@web.de> - 2015-08-04 04:32 +0200
            Re: Imagine the first landing strip on the moon John Gogo <jfgogo22@yahoo.com> - 2015-08-03 19:56 -0700
            Re: Imagine the first landing strip on the moon John Gogo <jfgogo22@yahoo.com> - 2015-08-03 19:58 -0700
            Re: Imagine the first landing strip on the moon Bohuš Matuška <bohu@paranetnet.net> - 2015-08-04 15:14 +0000
              Re: Imagine the first landing strip on the moon Thomas Heger <ttt_heg@web.de> - 2015-08-05 06:54 +0200
                Re: Imagine the first landing strip on the moon Bohuš Matuška <bohu@paranetnet.net> - 2015-08-05 13:35 +0000
                Re: Imagine the first landing strip on the moon Thomas Heger <ttt_heg@web.de> - 2015-08-06 06:42 +0200
                Re: Imagine the first landing strip on the moon John Gogo <jfgogo22@yahoo.com> - 2015-08-05 22:24 -0700
                Re: Imagine the first landing strip on the moon Thomas Heger <ttt_heg@web.de> - 2015-08-07 08:09 +0200
                Re: Imagine the first landing strip on the moon kefischer <emoneyjoe@iglou.com> - 2015-08-07 02:41 -0400
                Re: Imagine the first landing strip on the moon Thomas Heger <ttt_heg@web.de> - 2015-08-07 10:05 +0200
                Re: Imagine the first landing strip on the moon Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-07 10:29 +0200
                Re: Imagine the first landing strip on the moon kefischer <emoneyjoe@iglou.com> - 2015-08-07 06:21 -0400
                Re: Imagine the first landing strip on the moon Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-07 13:42 +0200
                Re: Imagine the first landing strip on the moon Emmerich Schultheiß <emme@noemail.thx> - 2015-08-07 13:01 +0000
                Re: Imagine the first landing strip on the moon Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-07 16:00 +0200
                Re: Imagine the first landing strip on the moon Emmerich Schultheiß <emme@noemail.thx> - 2015-08-07 14:11 +0000
                Re: Imagine the first landing strip on the moon Thomas Heger <ttt_heg@web.de> - 2015-08-07 18:26 +0200
                Re: Imagine the first landing strip on the moon kefischer <emoneyjoe@iglou.com> - 2015-08-07 11:20 -0400
                Re: Imagine the first landing strip on the moon Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-07 18:07 +0200
                Re: Imagine the first landing strip on the moon Emmerich Schultheiß <emme@noemail.thx> - 2015-08-07 17:18 +0000
                Re: Imagine the first landing strip on the moon pnalsing@gmail.com - 2015-08-07 10:41 -0700
                Re: Imagine the first landing strip on the moon Emmerich Schultheiß <emme@noemail.thx> - 2015-08-07 17:49 +0000
                Re: Imagine the first landing strip on the moon pnalsing@gmail.com - 2015-08-07 11:15 -0700
                Re: Imagine the first landing strip on the moon Emmerich Schultheiß <emme@noemail.thx> - 2015-08-07 18:26 +0000
                Re: Imagine the first landing strip on the moon kefischer <emoneyjoe@iglou.com> - 2015-08-07 14:31 -0400
                Re: Imagine the first landing strip on the moon pnalsing@gmail.com - 2015-08-07 11:46 -0700
                Re: Imagine the first landing strip on the moon kefischer <emoneyjoe@iglou.com> - 2015-08-07 15:58 -0400
                Re: Imagine the first landing strip on the moon pnalsing@gmail.com - 2015-08-07 19:43 -0700
                Re: Imagine the first landing strip on the moon John Gogo <jfgogo22@yahoo.com> - 2015-08-07 20:47 -0700
                Re: Imagine the first landing strip on the moon John Gogo <jfgogo22@yahoo.com> - 2015-08-07 18:49 -0700

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