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Author: Robert ClarkRobert Clark Date: Jan 11, 2008 22:50
Magnetoplasmadynamic thrusters have the advantage that they can be
scaled up to produce large amounts of thrust, while still maintaining
the high ISP of ion drives:
Magnetoplasmadynamic Thrusters.
"Testing for these thrusters has demonstrated exhaust velocities of
100,000 meters per second (over 200,000 mph) and thrust levels of 100
Newtons (22.5 pounds) at power levels of 1 megawatt. For perspective,
this exhaust velocity will allow a spacecraft to travel roughly 11
times the top speed of the space shuttle (18,000 mph)."
http://www.nasa.gov/centers/glenn/about/fs22grc.html
MY ELECTRIC ROCKET ENGINE.
http://www.waynesthisandthat.com/mpd.htm
The problem is the high amount of power required. However high
electrical power has been delivered up to hundreds of kilometers on
Earth over power lines. Then this could be used to deliver the
required electrical power to the thrusters from the ground.
Bob Clark
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Date: Jan 11, 2008 22:59
"Robert Clark" yahoo.com> wrote in message
news:a2b1daac-1ebd-4d77-b79c-1a95161e1866@i7g2000prf.googlegroups.com...
| Magnetoplasmadynamic thrusters have the advantage that they can be
| scaled up to produce large amounts of thrust, while still maintaining
| the high ISP of ion drives:
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Wow! Ion drives have internet service providers. Learn something
new every day.
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Author: Jan PanteltjeJan Panteltje Date: Jan 11, 2008 23:25
On a sunny day (Fri, 11 Jan 2008 13:50:53 -0800 (PST)) it happened Robert
Clark yahoo.com> wrote in
i7g2000prf.googlegroups.com>:
>Magnetoplasmadynamic thrusters have the advantage that they can be
>scaled up to produce large amounts of thrust, while still maintaining
>the high ISP of ion drives:
>
>Magnetoplasmadynamic Thrusters...
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Author: Puppet_SockPuppet_Sock Date: Jan 11, 2008 23:29
On Jan 11, 4:50 pm, Robert Clark yahoo.com> wrote:
[snip]> Magnetoplasmadynamic Thrusters.
> "Testing for these thrusters has demonstrated exhaust velocities of
> 100,000 meters per second (over 200,000 mph) and thrust levels of 100
> Newtons (22.5 pounds) at power levels of 1 megawatt.
Hmm... 100 Newtons from 1 MW.
> For perspective,
> this exhaust velocity will allow a spacecraft to travel roughly 11
> times the top speed of the space shuttle (18,000 mph).
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Author: Uncle AlUncle Al Date: Jan 12, 2008 02:23
Robert Clark wrote:
[snip crap]
1) "Long cables to power plasma rockets to orbit"
2) Idiot.
3) Use forged shitanium busbars as 50 mile-high thrust and power
rails.
4) Idiot.
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Author: John SchutkekerJohn Schutkeker Date: Jan 12, 2008 03:07
> Magnetoplasmadynamic thrusters have the advantage that they can be
> scaled up to produce large amounts of thrust, while still maintaining
> the high ISP of ion drives:
>
> Magnetoplasmadynamic Thrusters.
> "Testing for these thrusters has demonstrated exhaust velocities of
> 100,000 meters per second (over 200,000 mph) and thrust levels of 100
> Newtons (22.5 pounds) at power levels of 1 megawatt. For perspective,
> this exhaust velocity will allow a spacecraft to travel roughly 11
> times the top speed of the space shuttle (18,000 mph)."
> http://www.nasa.gov/centers/glenn/about/fs22grc.html
22.5 lbs of thrust is nothing, by the standards of the airborne vehicles
(rockets and jet planes) that we're familiar with. I think that this is
only for vehicles that have already been lifted free of the atmosphere
by chemical propellants. I doubt that there's any way that it would
work in the atmosphere, and it's almost certainly only for vehicles that
are already in outer space.
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Author: BenjBenj Date: Jan 12, 2008 12:15
On Jan 11, 4:50 pm, Robert Clark yahoo.com> wrote:
> The problem is the high amount of power required. However high
> electrical power has been delivered up to hundreds of kilometers on
> Earth over power lines. Then this could be used to deliver the
> required electrical power to the thrusters from the ground.
>
> Bob Clark
Hey Bob,
Any idea how much "hundreds of kilometers" of power line weighs even
in aluminum?
Did you forget your "rocket" will have to lift this "extension cord"
behind it?
God, I hate it when I'm on the same side as Uncle Al!
The "space elevator" though weird is much more practical.
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Author: Robert ClarkRobert Clark Date: Jan 12, 2008 14:37
On Jan 12, 6:15 am, Benj iwaynet.net> wrote:> On Jan 11, 4:50 pm, Robert Clark yahoo.com> wrote:
>>> The problem is the high amount of power required. However high
>> electrical power has been delivered up to hundreds of kilometers on
>> Earth over power lines. Then this could be used to deliver the
>> required electrical power to the thrusters from the ground.
>
>> Bob Clark
>
> Hey Bob,
> Any idea how much "hundreds of kilometers" of power line weighs even
> in aluminum?
>
> Did you forget your "rocket" will have to lift this "extension cord"
> behind it?
>
> God, I hate it when I'm on the same side as Uncle Al!
>
> ... ...
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Author: Martha AdamsMartha Adams Date: Jan 12, 2008 18:49
> Magnetoplasmadynamic thrusters have the advantage that they can be
> scaled up to produce large amounts of thrust, while still maintaining
> the high ISP of ion drives:
>
> Magnetoplasmadynamic Thrusters.
> "Testing for these thrusters has demonstrated exhaust velocities of
> 100,000 meters per second (over 200,000 mph) and thrust levels of 100
> Newtons (22.5 pounds) at power levels of 1 megawatt. For perspective,
> this exhaust velocity will allow a spacecraft to travel roughly 11
> times the top speed of the space shuttle (18,000 mph)."
> http://www.nasa.gov/centers/glenn/about/fs22grc.html
>
> MY ELECTRIC ROCKET ENGINE.
> http://www.waynesthisandthat.com/mpd.htm
>
> The problem is the high amount of power required. However high
> electrical power has been delivered up to hundreds of kilometers on
> Earth over power lines. Then this could be used to deliver the ...
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Author: Robert ClarkRobert Clark Date: Jan 12, 2008 21:51
On Jan 11, 5:29 pm, Puppet_Sock hotmail.com> wrote:> On Jan 11, 4:50 pm, Robert Clark yahoo.com> wrote:
> [snip]
>>> Magnetoplasmadynamic Thrusters.
>> "Testing for these thrusters has demonstrated exhaust velocities of
>> 100,000 meters per second (over 200,000 mph) and thrust levels of 100
>> Newtons (22.5 pounds) at power levels of 1 megawatt.
>
> Hmm... 100 Newtons from 1 MW.
>
>> For perspective,
>> this exhaust velocity will allow a spacecraft to travel roughly 11
>> times the top speed of the space shuttle (18,000 mph).
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