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06-09-2006
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#11 (permalink)
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Doing the Impossible
Location: Madison, OH (when not in fantasy land)
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Re: Prophesy Designs
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Originally Posted by KickAssClown
Sounds like what I mentioned way back when about using Gyros to shift the force of rotation to else where, and therefore aid in spin and despin. So sounds good.
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You are correct KAC. And I want to insure that people get the proper credit for their input! The thread has gotten so big that I was having trouble with finding all the original suggestions on the matter. (and I was tired and ready for bed)
Bill
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06-09-2006
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#12 (permalink)
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Ancora Imparo
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Re: Prophesy Designs
Hence the sub forum
Problem is we cant sort the thread out and keep it intact, ie posts cant be copied, only moved.. and I dont feel comfortable just hacking up our nice big thread when it could potentially cause more confusion than clarity
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06-09-2006
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#13 (permalink)
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Creating
Location: Winterpeg, Manitoba
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Re: Prophesy Designs
Hmm, On the weights on the prophercy roll-over thing i think this article may point to some ideas... http://hypography.com/forums/astrono...ve-rolled.html
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"With a big enough engine, even a brick will fly." -Law of Aerospace
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06-16-2006
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#14 (permalink)
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Explaining
Location: Kelowna, BC, Canada
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Re: Prophesy Designs
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Originally Posted by GAHD
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Should work if we are in a gravity well 
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Thank goodness science is based on "survival of the fittest" rather than being a Democracy!
Buffy
Evolution is a hoot if you are one of the survivors.
UncleAl
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06-16-2006
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#15 (permalink)
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Explaining
Location: Kelowna, BC, Canada
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Re: Prophesy Designs
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Originally Posted by KickAssClown
Sounds like what I mentioned way back when about using Gyros to shift the force of rotation to else where, and therefore aid in spin and despin. So sounds good.
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I still say placing a series (2 per module?) of thrusters pointing along the axis of the ship should suffice for steering. By firing them in sequence at 90 degrees to the intended direction change intended, you can actually use the precession effect of the rings to turn the ship.
If you do not do this, then you had better be prepared from some pretty severe stresses where the outer rings and the inner flywheel connect to the ship. They may be able to counter each others angular momentum nicely, but that does not meant that that momentum does not exists. Every time you try to turn the ship, those areas will be straining at their repsective load bearing points.
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Thank goodness science is based on "survival of the fittest" rather than being a Democracy!
Buffy
Evolution is a hoot if you are one of the survivors.
UncleAl
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06-16-2006
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#16 (permalink)
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Doing the Impossible
Location: Madison, OH (when not in fantasy land)
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Re: Prophesy Designs
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Originally Posted by Kayra
I still say placing a series (2 per module?) of thrusters pointing along the axis of the ship should suffice for steering. By firing them in sequence at 90 degrees to the intended direction change intended, you can actually use the precession effect of the rings to turn the ship.
If you do not do this, then you had better be prepared from some pretty severe stresses where the outer rings and the inner flywheel connect to the ship. They may be able to counter each others angular momentum nicely, but that does not meant that that momentum does not exists. Every time you try to turn the ship, those areas will be straining at their repsective load bearing points.
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With the size of the ship the load on the ends of those spokes is huge indeed. But she turns very slowly. My concern with using propellent is how much it will take. I like the idea of being able to orient the ship using the electrical energy from her reactor. It gives us virtually unlimited manuvering.
Bill
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The truth is incontravertible; malice may attack it, ignorance may deride it, but in the end there it is. - Winston Churchill
TheBigDog's recommended reading: The Science of Success - Charles G. Koch
A neutron goes into a bar and asks the bartender, "How much for a beer?"
The bartender replies, "For you, no charge."
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06-16-2006
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#17 (permalink)
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Explaining
Location: Kelowna, BC, Canada
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Re: Prophesy Designs
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Originally Posted by TheBigDog
My concern with using propellent is how much it will take.
Bill
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Probably drastically less then the amount of mass in the fly wheel 
Just a guess though.
Redundancy as well. If even one thruster is capable of firing, turns can still be made (eventually). If that flywheel blows a bearing.. getting out and pushing would be our only alternative.
There is something to be said for changing course electrically though.
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Thank goodness science is based on "survival of the fittest" rather than being a Democracy!
Buffy
Evolution is a hoot if you are one of the survivors.
UncleAl
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06-16-2006
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#18 (permalink)
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Doing the Impossible
Location: Madison, OH (when not in fantasy land)
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Re: Prophesy Designs
The ship could in theory be equipped to do both. Having the thrusters as a backup to the flywheel for the sake of redundancy. We could also use some creative engineering with our MEL's, and various satellite chassis to create a commputer controlled thruster system as needed. McGyverneering.
Bill
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aka TheBigDog - Hypography Full Freaking Moderator
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The truth is incontravertible; malice may attack it, ignorance may deride it, but in the end there it is. - Winston Churchill
TheBigDog's recommended reading: The Science of Success - Charles G. Koch
A neutron goes into a bar and asks the bartender, "How much for a beer?"
The bartender replies, "For you, no charge."
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06-16-2006
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#19 (permalink)
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Explaining
Location: Kelowna, BC, Canada
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Re: Prophesy Designs
Quote:
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Originally Posted by TheBigDog
The ship could in theory be equipped to do both. Having the thrusters as a backup to the flywheel for the sake of redundancy. We could also use some creative engineering with our MEL's, and various satellite chassis to create a commputer controlled thruster system as needed. McGyverneering.
Bill
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LOL. I like it.
We do not have to "McGyverneering" then unless we require it. Just having the capability should be enough, and pre-engineering the fit and controls should suffice.
I had envisioned the spin up/down process requiring thrusters as well, but the flywheel would resolve that quite handily.
So how much mass would a flywheel add to our ship?
I am guessing that would be dependent on the speed we spin it at , but there are limitations on just how fast you can make something that massive go.
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Thank goodness science is based on "survival of the fittest" rather than being a Democracy!
Buffy
Evolution is a hoot if you are one of the survivors.
UncleAl
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06-16-2006
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#20 (permalink)
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A Person
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Re: Prophesy Designs
I've had an idea for electro-magnetic powered Maneuvering drives for quiet sometime now. I don't know how well they would work, but hey.
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There are no truths in science, only the falsifiable hypotheses and explanations of the people who test them.
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