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#11
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Power situation in the ISS Russian Segment has degraded
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#12
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Power situation in the ISS Russian Segment has degraded
And your sources? References Hey ANY movement for microgravity research is bad news, even the crew moving around. Microgravity research should be done on a free flyer. |
#13
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Power situation in the ISS Russian Segment has degraded
http://www.grc.nasa.gov/WWW/RT2001/6...0tyburski.html
I do admit I am surprised at how far they got on this. But I stand by my statement any extra vibration degrades microgravity research. Of course just how much actual research is really occuring? |
#14
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Power situation in the ISS Russian Segment has degraded
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#15
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Power situation in the ISS Russian Segment has degraded
rk writes:
Flywheel Energy Storage System Designed for the International Space Station http://www.grc.nasa.gov/WWW/RT2001/6...0tyburski.html Don't tell Bob, you might shatter his delusion and send him over the edge. Jeff -- Remove "no" and "spam" from email address to reply. If it says "This is not spam!", it's surely a lie. |
#16
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Power situation in the ISS Russian Segment has degraded
The greatest advantage of flywheels
over batteries accrues in low earth orbit where eclipse happens more frequently and for larger fractions of an orbit than in higher orbits; repeated charge and discharge cycles, and high depth of discharge significantly degrade batteries over time. Sounds like ISS, doesn't it? Jeff -- Remove "no" and "spam" from email address to reply. If it says "This is not spam!", it's surely a lie. |
#17
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Power situation in the ISS Russian Segment has degraded
(Hallerb) writes:
Hey ANY movement for microgravity research is bad news, even the crew moving around. Microgravity research should be done on a free flyer. That's it, dodge again, never admitting that you're wrong about energy storage using flywheels. Why don't you look at how Hubble does attitude control. That's an application where you can't tolerate any vibration, yet... http://nssdc.gsfc.nasa.gov/database/...g?sc=1990-037B I quote: HST used an elaborate scheme for attitude control to improve the stability of the spacecraft during observations. Maneuvering was performed by four of six gyros, or reaction wheels. So, you're claiming that the "vibration problem" caused by gyros is so bad that they shouldn't be on space stations doing microgravity research, yet they're clearly "good enough" that you can use them on Hubble without screwing up long exposure pictures? Jeff -- Remove "no" and "spam" from email address to reply. If it says "This is not spam!", it's surely a lie. |
#18
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Power situation in the ISS Russian Segment has degraded
"Hallerb" wrote in message
... And your sources? References Hey ANY movement for microgravity research is bad news, even the crew moving around. Microgravity research should be done on a free flyer. You know, people would take you a little more seriously if you admitted an error instead of getting shriller about this issue. |
#19
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Power situation in the ISS Russian Segment has degraded
In news:Rick C typed:
"Hallerb" wrote in message ... And your sources? References Hey ANY movement for microgravity research is bad news, even the crew moving around. Microgravity research should be done on a free flyer. You know, people would take you a little more seriously if you admitted an error instead of getting shriller about this issue. He acts more the troll day after day. And he's a coward when it comes to confronting issues. Bob, not everything you read in the press is completely accurate. -- Mike __________________________________________________ ______ "Colorado Ski Country, USA" Come often, Ski hard, Spend *lots* of money, Then leave as quickly as you can. |
#20
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Power situation in the ISS Russian Segment has degraded
Manfred Bartz wrote in message ...
rk wrote: Manfred Bartz wrote: I am thinking flywheels. Spin them up when you have excess energy and used them to generate power when you need it. ... Flywheel Energy Storage System Designed for the International Space Station http://www.grc.nasa.gov/WWW/RT2001/6...0tyburski.html Thanks for this reference. I had no idea how far those systems are along the development path. Looks like a real possibility that flywheel systems might be flown as battery replacements in the next decade. With some more searching I found the NASA article TP-2003-212178 "Dynamics and Control of Attitude, Power, and Momentum for a Spacecraft Using Flywheels and Control Moment Gyroscopes". It suggests that combining flywheel energy storage with attitude control will have even greater benefits. The link to the original PDF does not work for me from Australia (it seems that I can't look up certain hosts in the .gov domain from here), but it might be ok for traffic originating from the US: http://techreports.larc.nasa.gov/ltr...3-tp212178.pdf http://techreports.larc.nasa.gov/ltr...09vol1rev1.pdf http://techreports.larc.nasa.gov/ltr...09vol2rev1.pdf These two documents contain NASA studies about possible enhancements to the ISS. Vol 2 have a chapter dedicated to Flywheels. It seems that both the study referred by RK and this one in vol 2 are the same. Anyway, everybody is free to take its own conclusions. --- Eduardo Tesheiner Madrid - Spain |
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