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Had to Ask

Posted by: bad_astra - Wed May 18, 2005 4:23 pm
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Had to Ask 
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Post Had to Ask   Posted on: Wed May 18, 2005 4:23 pm
Is ATO going to make use of a reversed electrodynamic tether? Just curious.


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Post Re: Had to Ask   Posted on: Fri May 20, 2005 7:38 pm
Vewy, wewy gud question. Hadn't occured to me, but now that you mention it...


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Post    Posted on: Tue May 24, 2005 2:20 pm
The silence is deafening. C'mon guys.. just say nay. :D


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Post    Posted on: Tue May 24, 2005 2:40 pm
What's a reversed electrodynamic tether anyway?

Just curious.

DKH

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Post    Posted on: Tue May 24, 2005 7:03 pm
I suppose I mean reversed polarity. Typically a tether would generate electricity, however, reversed it would actually be repulsed outward.


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Post    Posted on: Tue May 24, 2005 8:00 pm
Hmm. Interesting idea. I haven't calculated it out in detail, but my hunch is that this wouldn't work. Electrodynamic tethers work because they are buzzing through the Earth's magnetic field at orbital velocity. At a standstill, they give you nothing, and at very low speeds, they don't give you very much. Still, if what little thrust they generated was more than the drag on the airship, they could generate a continuous acceleration (although you'd probably still need to give the airship an initial boost with some more conventional method of propulsion).

My suspicion is that the T/D would be nowhere even close to positive, but sometime when I've got a spare moment or two I might try to figure it out for real. It would be amazing if something like that worked!


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Post    Posted on: Wed May 25, 2005 9:39 am
What caused the initial question of this thread? As far as I remeber the .pdf about the ATO explicitly says that it will use an ion engine.



Dipl.-Volkswirt (bdvb) Augustin (Political Economist)


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Post    Posted on: Wed May 25, 2005 4:16 pm
it would have to be the mother of all ion engines to propel something as big as ATO, and weight is a factor. I'm really just guessing here but I have a hunch there's more the one thing involved in propulsion


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Post    Posted on: Thu May 26, 2005 7:17 am
Hello, bad_astra,

I took your initial question as a question for information. The informations JP Aerospace provide says that they will use an ion drive.

So I wonder where you read something about JP Aerospace using a tether.



Dipl.-Volkswirt (bdvb) Augustin (Political Economist)


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Post    Posted on: Thu May 26, 2005 1:05 pm
Who says I did? :D


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