what is best? new or refurbished ?
#1
05-16-2009, 01:02 AM
gyro not working .. get new or refurbished ?
I read this and it made me think of our cars in this site.
Complex is just that, complex / complicated / expensive.
How many buy one of these 20 year old cars at 5 cents to the dollar and expect all the luxury and power of the Cadillac (when it was new) with the ease & economy of a Yugo? Well, life doesnt work that way.
read on ...
------------------------------
CAPE CANAVERAL, Fla. –
astronauts had to put a refurbished pair of gyroscopes into the Hubble Space Telescope after a brand new set refused to go in. Scientists were satisfied nonetheless and confident the observatory would point precisely to ever more distant objects in the cosmos.
Replacing the gyroscopes was priority of the mission, and the struggle had NASA on edge for hours.
Hubble ended up with four brand new gyroscopes and two refurbished ones that were original19-year-old telescope parts, said to be almost as good as the new ones. The telescope also got fresh batteries.
Three of the old gyroscopes no longer worked, and two others had been acting up with intermittent problems.
Atlantis astronauts, who once again were bedeviled by installation problems. On Thursday, another two-man team installed a powerful new camera and a computer data unit, after struggling with a stubborn bolt. NASA had hoped for an easier, less stressful spacewalk, but instead had to endure more drama.
As on Thursday, the astronauts got their work done, but it was harder and took longer than expected. Friday's spacewalk was one of the longest ever, lasting nearly 8 hours, and Mission Control told the weary crew members that they could sleep in and start Saturday's spacewalk a little late.
Nothing has gone quite as expected.
On Friday, Michael Massimino, who was working from inside Hubble, and his partner, Michael Good, had no problem removing all six of Hubble's 10-year-old gyroscopes. But upon installation, the last set of new gyroscopes wouldn't fit properly.
Mission Control instructed the men to go get a spare box of gyroscopes from the shuttle, and put that one in. This spare set originally was launched aboard Hubble in 1990 and returned in 1999.
The astronauts successfully installed the refurbished set. Then came the other major chore of the day, the battery swap. The hefty, nickel hydrogen batteries that came out were built before the telescope was launched in 1990. They come three to a pack, about the size of a big TV set with a mass of nearly 500 pounds. The final three batteries will be replaced early next week.
Hubble's deputy senior project scientist, Mal Niedner, said he was not concerned the astronauts had to resort to refurbished gyroscopes. They lack the latest anticorrosive wiring, but it's "the difference between an A and an A-plus."
Scientists expect the upgraded Hubble to look back even further in time, to within 500 million to 600 million years of creation.
The unused new gyroscopes that failed to fit, will be analyzed once they're returned to Earth.
NASA hopes to get another five to 10 years of use out of Hubble, once the Atlantis astronauts plug in all the new equipment. They also will take a crack at fixing two broken science instruments this weekend.
The mission cost NASA more than $1 billion
If you think that is too much, consider this ...
How much are the Feds expected to hand over to the failing banks, better known as the "Bank bail out" ?
$4 Trillion which is $4,000 BILLION
===================
$1,000,000 = 1 million
$1,000,000,000 = 1 billion
$1,000,000,000,000 = 1 trillion
Complex is just that, complex / complicated / expensive.
How many buy one of these 20 year old cars at 5 cents to the dollar and expect all the luxury and power of the Cadillac (when it was new) with the ease & economy of a Yugo? Well, life doesnt work that way.
read on ...
------------------------------
CAPE CANAVERAL, Fla. –
astronauts had to put a refurbished pair of gyroscopes into the Hubble Space Telescope after a brand new set refused to go in. Scientists were satisfied nonetheless and confident the observatory would point precisely to ever more distant objects in the cosmos.
Replacing the gyroscopes was priority of the mission, and the struggle had NASA on edge for hours.
Hubble ended up with four brand new gyroscopes and two refurbished ones that were original19-year-old telescope parts, said to be almost as good as the new ones. The telescope also got fresh batteries.
Three of the old gyroscopes no longer worked, and two others had been acting up with intermittent problems.
Atlantis astronauts, who once again were bedeviled by installation problems. On Thursday, another two-man team installed a powerful new camera and a computer data unit, after struggling with a stubborn bolt. NASA had hoped for an easier, less stressful spacewalk, but instead had to endure more drama.
As on Thursday, the astronauts got their work done, but it was harder and took longer than expected. Friday's spacewalk was one of the longest ever, lasting nearly 8 hours, and Mission Control told the weary crew members that they could sleep in and start Saturday's spacewalk a little late.
Nothing has gone quite as expected.
On Friday, Michael Massimino, who was working from inside Hubble, and his partner, Michael Good, had no problem removing all six of Hubble's 10-year-old gyroscopes. But upon installation, the last set of new gyroscopes wouldn't fit properly.
Mission Control instructed the men to go get a spare box of gyroscopes from the shuttle, and put that one in. This spare set originally was launched aboard Hubble in 1990 and returned in 1999.
The astronauts successfully installed the refurbished set. Then came the other major chore of the day, the battery swap. The hefty, nickel hydrogen batteries that came out were built before the telescope was launched in 1990. They come three to a pack, about the size of a big TV set with a mass of nearly 500 pounds. The final three batteries will be replaced early next week.
Hubble's deputy senior project scientist, Mal Niedner, said he was not concerned the astronauts had to resort to refurbished gyroscopes. They lack the latest anticorrosive wiring, but it's "the difference between an A and an A-plus."
Scientists expect the upgraded Hubble to look back even further in time, to within 500 million to 600 million years of creation.
The unused new gyroscopes that failed to fit, will be analyzed once they're returned to Earth.
NASA hopes to get another five to 10 years of use out of Hubble, once the Atlantis astronauts plug in all the new equipment. They also will take a crack at fixing two broken science instruments this weekend.
The mission cost NASA more than $1 billion
If you think that is too much, consider this ...
How much are the Feds expected to hand over to the failing banks, better known as the "Bank bail out" ?
$4 Trillion which is $4,000 BILLION
===================
$1,000,000 = 1 million
$1,000,000,000 = 1 billion
$1,000,000,000,000 = 1 trillion
Last edited by stomper; 05-16-2009 at 10:14 AM.
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