[amsat-bb] Re: Could we raise orbit thru magnetorque?
amvm at skynet.be
Wed Feb 21 10:55:02 PST 2007
So why is the maglev principle (magnetic levitation)
not applicable in space?
Magnetic levitation applied to trains generates an upward force equal and
opposite to the earth's gravitation.
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Bruce Bostwick
Sent: Wednesday, February 21, 2007 6:51 PM
To: amsat-bb at amsat.org
Subject: [amsat-bb] Re: Could we raise orbit thru magnetorque?
That's been my understanding as well. Magnetorquing by itself can
drive rotation but not translation. Its main benefit is that it
saves propellant, weight, and complexity, as well as moving parts and
the risk of a hypergolic plumbing assembly exploding and taking out
half the spacecraft's systems, by allowing the spacecraft to handle
rotation with more reliable torquing coils and get its energy for
that from the PV panels. Changing orbits still requires firing a
reaction thruster of some sort.
On Feb 20, 2007, at 9:47 AM, John Mock KD6PAG wrote:
>> Argument is: if when satellite is in the north, a north magnetic
>> field is
>> applied on z plane, will satellite raise orbit ? Same but opposite
>> on south.
>> Considering limited energy available could this raise be
>> significant if
>> applied on all orbits ?.
> I believe magnetorquing can only change the orientation of a
> satellite and
> not its orbit. It is certainly used in the process of changing an
> in order to get a thrusting device pointing in a direction where it
> do something useful. But by itself, it can't change an orbit. It
> can help
> point antennas in the proper direction, etc.
> -- KD6PAG (Networking Old-Timer, Satellite QRPer)
"People don't like to be meddled with. We tell them what to do, what
to think, don't run, don't walk. We're in their homes and in their
heads and we haven't the right. We're meddlesome." -- River Tam,
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