A "Star Trek" style magnetic shield may protect spaceships infuture. Magnetic propulsion?

On 8 Nov, 01:48, eric gisse wrote:
On Fri, 07 Nov 2008 10:14:03 -0800, Uncle Al
wrote:
[...]



The magnetic field plus solar wind would torque the spacecraft. *You
are not quite out of the woods. *"8^)

The field strength of solar wind is roughly 1nT at Earth's orbit,
modulated larger/smaller by the mood of the sun and decreasing as
1/r^3. The answer is going to be "not much".

Any craft capable of sustaining a 50T field can toss on a few ion
drive RCS engines that feed off the inevitible reactor that's powering
the field.

There are other ways this can be countered. You could have another
coil at a larger radius with current flowing the opposite way. BTW -
Who is saying 50T. My own calculations were based on 1T.

This gives rise to another interesting possibility magnetic
propulsion. There was one experiment where the Shuttle trailed a coil
and generated power. Put power in the other way and (potentially at
any rate) you have a means of accelerating spacecraft. What does a
magnetic spacecraft push against. In Earth orbit it pushes against the
magnetic field which is generated by the Earth's fluid core. So it is
the fluid core we are pushing against.

In mainstream sciece magnetic propulsion has had a bad press. It calls
to mind antigravity and Vril aircraft. Perhaps the most serious aspect
of antigravity is that it might be turing us away from technologies
that would really work. At LEO you are moving at 8km/s relative to the
fluid core. Magnetic propulsion has to be combined with ion drive,
otherwise you will have torques. The ion motors could be placed at the
end of a long boom so that lots or torque can be generated. In terms
of conservation of energy, the Earth's magnetic field creates a back
emf. As I said speed is 8km/s so 8KW will generate 1 Newton at 100%
efficiency.


- Ian Parker

So many questions, so little time and practically no resources, thanks
to our resident LLPOF warlord(GW Bush) and his brown-nosed army of
loyal minions and clowns, plus having less than zero opposition from
folks like yourself. But do you even know what "less than zero"
means?

A magnetic drive and/or shield without the necessary terawatts of
energy is kind of worthless, because you're talking about sustaining a
thousand fold LHC as your propulsion and shield. And to think that
all manners of extreme magnetic field testing has proven to NOT shield
worth squat unless you also have a surrounding flow of ionized plasma
or thick atmosphere (say 10+ tonnes/m2) seems to pass right over your
mainstream infomercial filled head.

We don't even have a Selene/moon L1 science platform (much less any
Clarke Station) in order to research and study such matters that could
really count.

As of the last few decades, we've been lied to so often that nothing
much matters.

Even yourself keeps sucking up to their hype and eye-candy of infowar
disinformation, as though such mainstream infomercials are the last
word of God.

You keep ignoring the potential worth and/or consequences of our moon,
and you're obviously blind and/or dumbfounded beyond hope whenever it
comes down to anything about Venus.

What the hell gives?

Do you not care that ETs have been mining Venus and accomplishing
whatever else, right next door to us and thus right under our brown
nose?

Do you not understand or simply have no interest in the truth or
implications of such?

~ Brad Guth Brad_Guth Brad.Guth BradGuth BG / “Guth Usenet�


�Whoever controls the past, controls the future� / George Orwell

“We're ignorant of life in the universe. We only have one planet that
serves as an example and in science it's not good to derive
information from a sample size of one.� / David Grinspoon

Ian Parker wrote:
On 8 Nov, 01:48, eric gisse wrote:
On Fri, 07 Nov 2008 10:14:03 -0800, Uncle Al
wrote:
[...]



The magnetic field plus solar wind would torque the spacecraft. �You
are not quite out of the woods. �"8^)

The field strength of solar wind is roughly 1nT at Earth's orbit,
modulated larger/smaller by the mood of the sun and decreasing as
1/r^3. The answer is going to be "not much".

Any craft capable of sustaining a 50T field can toss on a few ion
drive RCS engines that feed off the inevitible reactor that's powering
the field.

There are other ways this can be countered. You could have another
coil at a larger radius with current flowing the opposite way. BTW -
Who is saying 50T. My own calculations were based on 1T.

This gives rise to another interesting possibility magnetic
propulsion. There was one experiment where the Shuttle trailed a coil
and generated power. Put power in the other way and (potentially at
any rate) you have a means of accelerating spacecraft. What does a
magnetic spacecraft push against. In Earth orbit it pushes against the
magnetic field which is generated by the Earth's fluid core. So it is
the fluid core we are pushing against.

In mainstream sciece magnetic propulsion has had a bad press. It calls
to mind antigravity and Vril aircraft. Perhaps the most serious aspect
of antigravity is that it might be turing us away from technologies
that would really work. At LEO you are moving at 8km/s relative to the
fluid core. Magnetic propulsion has to be combined with ion drive,
otherwise you will have torques. The ion motors could be placed at the
end of a long boom so that lots or torque can be generated. In terms
of conservation of energy, the Earth's magnetic field creates a back
emf. As I said speed is 8km/s so 8KW will generate 1 Newton at 100%
efficiency.


- Ian Parker

On Nov 8, 8:17*am, BradGuth wrote:

As of the last few decades, we've been lied to so often that nothing
much matters.

Even yourself keeps sucking up to their hype and eye-candy of infowar
disinformation, as though such mainstream infomercials are the last
word of God.

You keep ignoring the potential worth and/or consequences of our moon,
and you're obviously blind and/or dumbfounded beyond hope whenever it
comes down to anything about Venus.

What the hell gives?

Do you not care that ETs have been mining Venus and accomplishing
whatever else, right next door to us and thus right under our brown
nose?

Do you not understand or simply have no interest in the truth or
implications of such?


wow I leave for like 3 years and come back and Brad is still going
on...


This gives rise to another interesting possibility magnetic
propulsion. There was one experiment where the Shuttle trailed a coil
and generated power. Put power in the other way and (potentially at
any rate) you have a means of accelerating spacecraft. What does a
magnetic spacecraft push against. In Earth orbit it pushes against the
magnetic field which is generated by the Earth's fluid core. So it is
the fluid core we are pushing against.

* - Ian Parker

Yes, why is it that no satellite manufacturers are installing these
sort of systems on satellites even for station keeping purposes? 0.1
newton from 800 watts is a lot of thrust when used constantly, allows
you essentially to operate as an OTV without any fuel. Seems a no
brainer to me.

On Nov 8, 6:05 pm, Mike Lorrey wrote:
On Nov 8, 8:17 am, BradGuth wrote:





As of the last few decades, we've been lied to so often that nothing
much matters.

Even yourself keeps sucking up to their hype and eye-candy of infowar
disinformation, as though such mainstream infomercials are the last
word of God.

You keep ignoring the potential worth and/or consequences of our moon,
and you're obviously blind and/or dumbfounded beyond hope whenever it
comes down to anything about Venus.

What the hell gives?

Do you not care that ETs have been mining Venus and accomplishing
whatever else, right next door to us and thus right under our brown
nose?

Do you not understand or simply have no interest in the truth or
implications of such?

wow I leave for like 3 years and come back and Brad is still going
on...

So, you don't believe in the regular laws of physics. I should have
figured as much.

~ BG

Mike Lorrey wrote:
wow I leave for like 3 years and come back and Brad is still going
on...



And about Venus at that. :-)

Pat