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Groups > sci.physics.relativity > #359782
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Newsgroups | sci.physics.relativity, sci.physics |
| Subject | Re: Imagine the first landing strip on the moon |
| Date | 2015-08-06 06:42 +0200 |
| Message-ID | <d2g6u2Fch63U1@mid.individual.net> (permalink) |
| References | (11 earlier) <4fmsratt5k1df8ksfp6httil17qqon1c9r@4ax.com> <d2amihFtn7U1@mid.individual.net> <mpqks6$3aa$1@speranza.aioe.org> <d2dj88Fn1iuU1@mid.individual.net> <mpt3fp$j4l$2@speranza.aioe.org> |
Cross-posted to 2 groups.
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
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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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