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meekGee
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« Reply #375 on: 10/08/2012 02:30 AM » |
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Speculation: the event came suspiciously close to max-Q. If it was indeed the corner engine fairing that broke off (and that was a fairly large piece visible), it might have damaged the corner engine enough to cause the engine controller to shut it down.
I like this one better. Since the turbopumps are supposed to be compartmentalized to prevent collateral damage, why would a failed turbopump cause such a large piece to fall off? otoh, ugordan's explanation is a single cause proposal. my vote's here.
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Lee Jay
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« Reply #376 on: 10/08/2012 02:32 AM » |
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Does it? I see what looks like the vehicle passing through the cloud deck.
See if you can play the video I posted above. It's conclusive that parts came off.
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kirghizstan
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« Reply #377 on: 10/08/2012 02:33 AM » |
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i cannot do screen captures on this but the video from below seems to show something happening at that moment to like the plume of one engine changes and after a few seconds shuts down. maybe someone here can take a look and let me know if i'm seeing things. it looks like there is a darker streak on one of the corners relative to the others.
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Chandonn
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« Reply #378 on: 10/08/2012 02:35 AM » |
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Does it? I see what looks like the vehicle passing through the cloud deck.
See if you can play the video I posted above. It's conclusive that parts came off.
I still disagree. It happens right as the vehicle passes through the cloud deck. It could be a part falling off, or a turbopump exploding. I'd rather wait for something official before jumping to conclusions. And, yes, the video DOES simply look like a pass through the cloud layer to me.
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Kabloona
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« Reply #379 on: 10/08/2012 02:38 AM » |
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Speculation: the event came suspiciously close to max-Q. If it was indeed the corner engine fairing that broke off (and that was a fairly large piece visible), it might have damaged the corner engine enough to cause the engine controller to shut it down.
I like this one better. Since the turbopumps are supposed to be compartmentalized to prevent collateral damage, why would a failed turbopump cause such a large piece to fall off?
otoh, ugordan's explanation is a single cause proposal. my vote's here.
I agree, on further review, with ugordan. There were big, big pieces coming off right after going supersonic, and it's more likely aero forces than an exploding turbopump making those big pieces come off. I retract my rash exploding turbopump theory...
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Hooperball
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« Reply #380 on: 10/08/2012 02:38 AM » |
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Looks like Spacex just pulled the video off their YouTube channel...
S
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CapitalistOppressor
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« Reply #381 on: 10/08/2012 02:40 AM » |
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Does it? I see what looks like the vehicle passing through the cloud deck.
See if you can play the video I posted above. It's conclusive that parts came off.
I saw parts. I like the fairing hypothesis but thats just speculation. However, my reading of the presser is that an engine out scenario was all but confirmed by Gywnne Showell. Of course this is still speculation until we get info from SpaceX.
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Jason1701
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« Reply #382 on: 10/08/2012 02:40 AM » |
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Looks like Spacex just pulled the video off their YouTube channel...
S
It's unlisted now.
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Kabloona
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« Reply #383 on: 10/08/2012 02:42 AM » |
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Does it? I see what looks like the vehicle passing through the cloud deck.
See if you can play the video I posted above. It's conclusive that parts came off.
I still disagree. It happens right as the vehicle passes through the cloud deck. It could be a part falling off, or a turbopump exploding. I'd rather wait for something official before jumping to conclusions. And, yes, the video DOES simply look like a pass through the cloud layer to me.
There were DEFINITELY large pieces coming off, and immediately that engine plume becomes suddenly less fire and more smoke...
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DaveJ576
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« Reply #384 on: 10/08/2012 02:42 AM » |
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I watched the video several times with rapid start/stops and it really looks like something exploded followed by an engine shut down. Large chunks of something came off the vehicle.
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meekGee
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« Reply #386 on: 10/08/2012 02:45 AM » |
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I can pull three distinct images from the youTube video.
One clearly shows large pieces in the exhaust flow.
The second shows the smaller ones, but you can make the large piece just exiting the flow's background, on the top edge. It is illuminated - it looks like a "bump" in the flow.
The third is just starting to get blurry, it's hard to tell what's what, but if you count the bulges the define the nozzle of the engines, you usually see 5 (with the corner engine in the middle) and now only 4 are visible, with the center one missing. Once you know what it was, it's clear that the dark streak is from the engine - as if it is either very damaged or in the process of shutting down.
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sdsds
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« Reply #387 on: 10/08/2012 02:46 AM » |
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As for whether this CRS-1 event will impact the CRS-2 launch: it's almost certain that somebody now has a lot more work to do between now and then! I hope they are open about it. Can anyone confirm the investigation will need to fully include the range operator (USAF) at a minimum? Does NASA pay for insight into this at all?
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Hooperball
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« Reply #388 on: 10/08/2012 02:47 AM » |
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From what I saw in the video that's not on YouTube any more I'm surprised none of the other engines were taken out by an explosion of that size.
S
(Edited to correct terminology.)
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trothamel
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« Reply #389 on: 10/08/2012 02:48 AM » |
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I posted this in the other thread - sorry if that was the wrong place for it - but it looks like two pieces fell off a fraction of a second before the three images meekGee posted.
Although it's hard to catch in stills, those pieces appear to be tumbling.
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