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Could a Dirty Rag Take Out a $2 Billion Satellite?
An anonymous reader writes "The alleged rescue of a U.S. military communications satellite underscores some of the weaknesses in U.S. space efforts. Quoting: 'The seven-ton “AEHF-1,” part of a planned six-satellite constellation meant to support radio communication between far-flung U.S. military units, had been in orbit just one day when the problems began. The satellite started out in a highly-elliptical, temporary orbit. The plan was to use the spacecraft’s on-board engine to boost it to a permanent, geo-stationary orbit. But when the Air Force space operators at Los Angeles Air Force Base activated the engine, nothing happened. The Government Accountability Office would later blame the failure on a rag left inside a fuel line by a Lockheed worker.'"
Seems like the gov't should sue lockheed for failing to deliver the working satellite as contracted.
Hopefully that'll happen (which will probably leave that worker jobless) and we'll get some of our tax dollars back.
Shhh... I can dream!
Assembly failure - leave a rag.
Inspection failure - did not check for rag.
Pre-flight final inspection - still did not find the rag.
Wow, complete failure all the way down the line from assembly to mating with the launch vehicle.
Do not look at laser with remaining good eye.
FTA: "They didn’t know it at the time, but a fuel line had become clogged. The blockage “was most likely caused by a small piece of cloth inadvertently left in the line during the manufacturing process,” according to the Government Accountability Office." (bolding mine).
So no, we don't know that a dirty rag caused a two billion dollar satellite to fail. We think a fuel line became clogged, and some government bean-counter pulled the dirty-rag hypothesis straight out of their derriere so they could sign off on this one and go home.
"Finally, it speaks to the size and age of the U.S. space arsenal that the Air Force felt it had no choice but to rescue AEHF-1 instead of replace it with a back-up spacecraft. 'The asset inventory is getting so tight that they spent months limping the heap to its proper orbit,' the insider lamented."
Look guys, before you throw away (replace with a backup) a $2 Billion satellite, I damn well hope you try some pretty heroic measures. Those are my tax dollars in (the wrong) orbit! So I'm very glad you didn't have (to use) a backup satellite.
Anyway, does anyone know if the low power thrusters which were eventually used to put this satellite into the correct orbit used the same fuel tank as the clogged thruster? Otherwise 1) I'm very surprised they had enough fuel to get there and 2) they would probably have very little left to last the lifetime of the mission. So let's hope that all the thrusters used a central (hydrazine?) fuel tank and there's plenty left.
Space is hard and while the U.S. program has certainly had its ups and downs at least it hasn't seen the near total collapse as what happened to the Ruskies. They had quite a bad year last year and that blogger walking around their factory just exposed their problems more. If Mars is going to be a "Red" planet it will because of China not Russia.
Yeah. Damn it people! This is just rocket science, not brain surgery!
Actually, compared to rocket science, brain surgery is a walk in the park.
If it weren't for deadlines, nothing would be late.
Probably the same reason why things end up being left inside of patients. Accidents happen, even if it's something that should never happen because it was on the checklist.
No, not paper. These things are assembled in cleanrooms, in which ordinary paper is not allowed, due to the particles/fibers it sheds. Cleanroom cloths are usually lint-free polyester cloth squares about 8 inches on a side, IME.
...the future crusty old bastards are already drinking the Kool-Aid.
More seriously, why wouldn't groundside testing notice that there was a rag in the line?
Some of these positioning rockets are single-use. If you test one you have to build another to replace it. And then test it. And then.....
No one ever had to evacuate a city because the solar panels broke!