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Space X Fail

07/20/2015 4:22 PM

http://www.cnbc.com/2015/07/20/musk-this-is-what-caused-the-spacex-launch-failure.html

company identified a two-foot steel strut that was holding down the helium pressure vessels that snapped due to acceleration force. There was a mere 0.89 seconds between when a problem was noticed and when the explosion happened.

I was thinking a valve

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Guru

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#1

Re: space x fail

07/20/2015 5:06 PM

I'm not seeing how loose helium bottles caused an "overpressure event in the O2", but I'll stay with the story

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#2

Re: Space X Fail

07/20/2015 6:03 PM

"The helium bottles are stored within the liquid oxygen fuel tank to sustain pressure as the fuel is consumed during flight. Pre-flight tests apparently missed the flaw in the strut because the stress increases at higher g-force pressure. Musk said that after the crash, SpaceX tested thousands of struts from the supplier that made them, and discovered several that failed below their rated tolerances.

"Obviously, what we're going to do in the future is not use these particular struts, and we're going to move to individually testing each strut independent of any material certifications," Musk said. "There will be some cost increase to the rocket, and not we believe to a significant amount.""

""One of those struts failed and was unable to hold the helium bottle down, and the helium bottle would have shot to the top of the tank at high speed," Musk said in a call with reporters today, characterizing his analysis as an "initial assessment" that is highly probable but not definitive."

http://qz.com/458781/elon-musk-says-spacexs-latest-rocket-exploded-after-a-single-strut-snapped/


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#3
In reply to #2

Re: Space X Fail

07/20/2015 7:17 PM

http://xrayinspectionservice.com/ surprising if this turns out to be the base story once they conclude their investigation. my aerospace friends are either laughing or spitting up their coffee if a micro fracture that would have shown up instantly on a scan was overlooked in their inspection protocol.skimp on preassembly cost and rockets go bye bye

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#4
In reply to #3

Re: Space X Fail

07/21/2015 8:49 AM

It might just be that the contract with the supplier specifies this testing. In our "outsourced" world we often do not do our own testing. This reliance on the integrity of others has been a frequent culprit in spectacular failures.

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#5

Re: Space X Fail

07/23/2015 9:55 PM

Wouldnt it be just better to get the bugs out of the rocket with several empty dry runs instead of loading up every rocket with expensive unmentionables only to ditch it because of a faulty part ?

I wonder how much that strut co$t, in relation to how much everything else did.

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