Re: Are Space Flights Always Limited to the Solar System Plane?

From	Poutnik <poutnik4nntp@gmail.com>
Newsgroups	sci.physics
Subject	Re: Are Space Flights Always Limited to the Solar System Plane?
Date	2017-07-15 11:23 +0200
Organization	Personal
Message-ID	<okcmo0$crg$1@dont-email.me> (permalink)
References	(4 earlier) <ok8p0f$1hdl$1@gioia.aioe.org> <ok92d70hbg@news7.newsguy.com> <6lchmcl3c7se11c38kb0q7b1ho3l0fv5k2@4ax.com> <okbj9501nee@news3.newsguy.com> <okclin$9on$1@dont-email.me>

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Dne 15/07/2017 v 11:04 Poutnik napsal(a):
> See the Ciolkovski equation [1]
> 
>  delta_v = v_e * ln ( m0 / m1 )
> 
> [...]
> 
> For 1 stage rocket,
> For v_e= 3 km/s , 30 km/s difference and 10 ton of total final mass,
> ( useful cargo would be much less )
> we need. 10 * exp ( 30/3) = 220 000 tons.
> 
> For 2 or 3 stage, it would be better, but not dramatically.
> 
> For comparison, Saturn V, used in the Apollo program,
> had about 3 000 tons.[3].
> 
Let suppose 3 stage rocket with estimated mass ratios

10% of mass is the next stage or final cargo modul.
15% of mass is the stage construction mass.
75% of mass is the stage fuel mass.
( real numbers differ )

the total mass, with 10 ton final cargo modul,
would be 10 000 ton, more than 3 times Saturn V

m0/m1 will be always the same 100/25 = 4.0
ln 4.0 = cca 1.4

delta_v for each stage will be 3 * 1.4 = 4.2 km/s
Total delta_v will be 3 * 4.2 = 12.6 km/s

-- 
Poutnik ( The Pilgrim, Der Wanderer )

A wise man guards words he says,
as they say about him more,
than he says about the subject.

Thread

Are Space Flights Always Limited to the Solar System Plane? "F. Russell" <fr@random.info> - 2017-07-13 18:45 +0000
  Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-13 21:18 +0200
  Re: Are Space Flights Always Limited to the Solar System Plane? Mahipal <mahipal7638@gmail.com> - 2017-07-13 13:32 -0700
    Re: Are Space Flights Always Limited to the Solar System Plane? "F. Russell" <fr@random.info> - 2017-07-13 21:15 +0000
      Re: Are Space Flights Always Limited to the Solar System Plane? Serg io <invaalid@invalid.com> - 2017-07-13 16:22 -0500
        Re: Are Space Flights Always Limited to the Solar System Plane? Serg io <invaalid@invalid.com> - 2017-07-13 16:33 -0500
          Re: Are Space Flights Always Limited to the Solar System Plane? "F. Russell" <fr@random.info> - 2017-07-14 00:14 +0000
            Re: Are Space Flights Always Limited to the Solar System Plane? Serg io <invaalid@invalid.com> - 2017-07-13 19:46 -0500
            Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-14 07:30 +0200
              Re: Are Space Flights Always Limited to the Solar System Plane? "F. Russell" <fr@random.info> - 2017-07-14 09:03 +0000
                Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-14 12:21 +0200
            Re: Are Space Flights Always Limited to the Solar System Plane? Wally W. <ww84wa@aim.com> - 2017-07-14 08:10 -0400
              Re: Are Space Flights Always Limited to the Solar System Plane? "F. Russell" <fr@random.info> - 2017-07-14 23:14 +0000
                Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-15 11:04 +0200
                Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-15 11:23 +0200
                Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-15 13:34 +0200
                Re: Are Space Flights Always Limited to the Solar System Plane? "F. Russell" <fr@random.info> - 2017-07-15 12:55 +0000
                Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-15 15:18 +0200
                Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-15 16:14 +0200
      Re: Are Space Flights Always Limited to the Solar System Plane? Mahipal <mahipal7638@gmail.com> - 2017-07-13 19:26 -0700
        Re: Are Space Flights Always Limited to the Solar System Plane? "F. Russell" <fr@random.info> - 2017-07-14 09:11 +0000
          Re: Are Space Flights Always Limited to the Solar System Plane? Mahipal <mahipal7638@gmail.com> - 2017-07-14 04:09 -0700
            Re: Are Space Flights Always Limited to the Solar System Plane? Edward Prochak <edprochak@gmail.com> - 2017-07-14 05:22 -0700
              Re: Are Space Flights Always Limited to the Solar System Plane? Mahipal <mahipal7638@gmail.com> - 2017-07-14 06:33 -0700
            Re: Are Space Flights Always Limited to the Solar System Plane? fr314159@gmail.com - 2017-07-14 07:30 -0700
              Re: Are Space Flights Always Limited to the Solar System Plane? Mahipal <mahipal7638@gmail.com> - 2017-07-14 08:05 -0700
                Re: Are Space Flights Always Limited to the Solar System Plane? Serg io <invaalid@invalid.com> - 2017-07-14 11:50 -0500
      Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-14 06:43 +0200
  Re: Are Space Flights Always Limited to the Solar System Plane? "Dave" <dave1981@hotmail.com> - 2017-07-15 07:10 -0700
    Re: Are Space Flights Always Limited to the Solar System Plane? Poutnik <poutnik4nntp@gmail.com> - 2017-07-15 16:18 +0200
  Re: Are Space Flights Always Limited to the Solar System Plane? "reber G=emc^2" <herbertglazier0@gmail.com> - 2017-07-15 13:56 -0700
    Re: Are Space Flights Always Limited to the Solar System Plane? "hanson" <hanson@quick.net> - 2017-07-15 17:16 -0700

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