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#151
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As I predicted, space X to get military contracts:)
On Dec 28, 9:17*pm, Fred J. McCall wrote:
bob haller wrote: On Dec 27, 3:46*pm, Jeff Findley wrote: In article 79c8cd29-02da-4198-94e2- , says... On Dec 27, 11:27*am, Fred J. McCall wrote: Still all irrelevant to your prior claims about 'tumbling' and 'out of control'. *It took it YEARS to come down after it was abandoned, so an 'urgent emergency launch' system that could launch in a year or so would have been more than adequate to the task. So why do we need your proposed 'urgent launch' system, again? a non controlled ISS will tumble because of varying drag largely from solar panels...... but also from its general shape You've certainly not "done the math" to prove this assertion. *Do you have a cite from someone who has "done the math"? *Also, just how long would it take to build up a Salyut 7 sort of "tumble"? And do note that in the case of Salyut 7, a Soyuz was still able to successfully dock to the powerless, tumbling, station almost a full *3 months* after ground control lost contact with it. *Also note that it didn't "fall out of the sky" during that time, even though it was without power and could not re-boost itself! *Cite: * *http://en.wikipedia.org/wiki/Salyut_7 Again, history does *not* support your "quick launch" argument in the least. station needs regular re boosts because of atmosphere drag at it realtively low orbit.... choosen so both russia and US can reach it. the orbit selected was a compromise that really constrained shuttle, most modules were lofted empty because of weight, later missions took the racks Even if all re-boost capability were lost, ISS would take quite a long time to reenter. *Cite: * *http://spacemath.gsfc.nasa.gov/weekly/WeekAK.pdf Worst case scenario (high solar activity year like the year 2000) would still take ISS *over a year* for its orbit to decay. In the real world, "quick launch" is simply *not* needed for this, highly unlikely, scenario. once the tumble is bad enough it will be impossible to dock with ISS, the large structure could hit the vehicle aattempting to dock, plus if the tumble gets bad enough parts will rip off the station, think modules. Go do the math on just how bad that tumble would have to be before 'parts will rip off the station' and calculate how many YEARS you have before that happens. now i hope nothing bad ever occurs, but if and when it does we can discuss this again.. personally given russias recent record i think a soyuz failure should be expected..... now wether fast launch will help who knows but it sure cant hurt....... Of course it can hurt! *You can waste so much money doing it that missions just don't happen. -- "Some people get lost in thought because it's such unfamiliar *territory." * * * * * * * * * * * * * * * * * * * --G. Behn a few years ago florida and nasa were looking at fast launch to orbit for communication sats, in case of a failure. at the time the idea was to keep some sats in long term storage,ready for launch within days.... currently they try to have some extra sats in orbit in case of emergency, however often the sats are near end of life and have problems |
#152
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As I predicted, space X to get military contracts:)
well looks like nasa wants to move a asteroid, like I posted about
recently. in this case they want to use it as a new station or base.... http://www.dailymail.co.uk/sciencete...=feeds-newsxml |
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