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Re: Going Up!

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On 9/19/2018 3:14 PM, Edward Prochak wrote:
> On Tuesday, September 18, 2018 at 7:51:36 PM UTC-4, Sergio wrote:
>> On 9/18/2018 3:29 PM, Edward Prochak wrote:
>>>
>>> A tower does not work as well as a tether design. With the center
>>> of mass slightly above geosynchronous orbit, a cable reaching down
>>> to earth's surface provides everything that is needed.
>>>
>>> No danger of collapse.
>>> deployment is achievable, especially with today's rockets.
>>>
>>> Only the cable is the tough part. material having consistent
>>> Tensile strength for a length over 35,000 km (21,000 miles)
>>> is a challenge.
>>>
> []
>>> It would have to be based at an equatorial country, one of
>>> 13 countries: Ecuador, Colombia, Brazil, Sao Tome & Principe,
>>> Gabon, Republic of the Congo, Democratic Republic of the Congo,
>>> Uganda, Kenya, Somalia, Maldives, Indonesia and Kiribati.
>>>
>>> Really, at this point it is only an engineering problem
>>> of building the cables and getting them in place.
>>>
>>> Enjoy,
>>> ed
>>>
>>
>> open questions;
>>
>> if not a tower, what is holding the cable up ?
>> is it a counterweight above geosync ?
> 
> yes
> 
>> would one still have to fix cable to the ground ?
> 
> Interesting question. I don't know the answer.
> 
>> how to keep the counterweight in position ?
> 
> It is geosynchronous. it orbits at the same angular speed
> that the earth turns. 

that is only at one point on the cable, no gravity

take a section of cable at a lower orbit, it has gravity (vector has
vertical component downward)

Above a section of cable has negitive gravity, thrown outward.

interesting problem, worth a look using velocity vector and
accelleration vector, on small segment of cable, then integrate over
parts of cable,  and sum the 'weight of cable due to gravity' from
ground up, etc...  (double that for stress on cable at Geosync)

> 
>> is the cable cutting lines of magnetic field?
> 
> The only significant magnetic field would be the earth's field.
> I am pretty sure that field turns with the earth and so the
> tether would not be moving relative to that field. So no induced
> currents AFAIK.
> 
> Great questions.
> Ed
> 

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Going Up! The Starmaker <starmaker@ix.netcom.com> - 2018-09-04 10:27 -0700
  Re: Going Up! Edward Prochak <edprochak@gmail.com> - 2018-09-04 13:14 -0700
    Re: Going Up! Sergio <invalid@invalid.com> - 2018-09-04 19:09 -0500
      Re: Going Up! Edward Prochak <edprochak@gmail.com> - 2018-09-14 06:26 -0700
        Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-14 07:25 -0700
          Re: Going Up! Sergio <invalid@invalid.com> - 2018-09-14 09:38 -0500
            Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-14 07:43 -0700
            Re: Going Up! benj <benj.fake@gmail.com> - 2018-09-14 11:26 -0400
          Re: Going Up! Edward Prochak <edprochak@gmail.com> - 2018-09-17 10:01 -0700
            Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-17 12:10 -0700
              Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-17 21:24 +0000
                Re: Going Up! mitchrae3323@gmail.com - 2018-09-17 14:34 -0700
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-17 16:12 -0700
                Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-17 23:22 +0000
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-18 06:29 -0700
                Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-18 14:30 +0000
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-18 08:13 -0700
                Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-18 16:22 +0000
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-18 10:28 -0700
                Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-18 18:52 +0000
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-18 11:55 -0700
                Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-18 20:04 +0000
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-18 13:11 -0700
                Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-18 21:27 +0000
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-18 14:30 -0700
                Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-19 00:02 +0000
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-18 17:20 -0700
                Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-19 00:42 +0000
                Re: Going Up! Edward Prochak <edprochak@gmail.com> - 2018-09-18 13:29 -0700
                Re: Going Up! Sergio <invalid@invalid.com> - 2018-09-18 18:51 -0500
                Re: Going Up! benj <benj.fake@gmail.com> - 2018-09-18 21:06 -0400
                Re: Going Up! Sergio <invalid@invalid.com> - 2018-09-18 21:26 -0500
                Re: Going Up! mitchrae3323@gmail.com - 2018-09-18 19:38 -0700
                Re: Going Up! Sergio <invalid@invalid.com> - 2018-09-18 21:48 -0500
                Re: Going Up! mitchrae3323@gmail.com - 2018-09-18 19:51 -0700
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-19 07:01 -0700
                Re: Going Up! Edward Prochak <edprochak@gmail.com> - 2018-09-19 13:31 -0700
                Re: Going Up! Edward Prochak <edprochak@gmail.com> - 2018-09-19 13:29 -0700
                Re: Going Up! Sergio <invalid@invalid.com> - 2018-09-19 21:00 -0500
                Re: Going Up! Edward Prochak <edprochak@gmail.com> - 2018-09-19 13:14 -0700
                Re: Going Up! Sergio <invalid@invalid.com> - 2018-09-19 21:08 -0500
                Re: Going Up! john <johnsefton288@gmail.com> - 2018-09-18 06:34 -0700
                Re: Going Up! Odd Bodkin <bodkinodd@gmail.com> - 2018-09-18 14:30 +0000
      Re: Going Up! "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-09-19 22:37 -0700
        Re: Going Up! Sergio <invalid@invalid.com> - 2018-09-20 10:09 -0500
  Re: Going Up! Haných Ltskáš <lnni@yawlucla.ha> - 2018-09-04 23:08 +0000

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