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SpaceX Reusable Rocket Prototype Explodes Over Texas
"A reusable rocket prototype built by the private spaceflight company SpaceX
exploded over the firm's Texas proving grounds Friday (Aug. 22) after an anomaly forced the destruction of the craft. The SpaceX rocket detonation occurred over McGregor, Texas, where SpaceX has been testing reusable rocket technology using its prototype Falcon 9 Reusable (or F9R) vehicle. One observer video shows debris falling from the sky just after the explosion." See: http://www.space.com/26921-spacex-re...xas-video.html |
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SpaceX Reusable Rocket Prototype Explodes Over Texas
In sci.space.policy Jeff Findley wrote:
For now, it's looking like that's not a big issue. So far, the Falcon 9R tests (up to the latest which had to be destroyed during flight, not landing) have all been successful during the landing phase. If this were an issue, I think we would have seen a failure sooner than now and it would have been during landing. Was the "during flight" test object an F9R or was that a Grasshopper? Anyway, it may have been my Mk I eyeballs not working well with fuzzy video but that last water landing looked like the stage was not vertical when it met the water. rick jones -- Wisdom Teeth are impacted, people are affected by the effects of events. these opinions are mine, all mine; HP might not want them anyway... feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH... |
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SpaceX Reusable Rocket Prototype Explodes Over Texas
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SpaceX Reusable Rocket Prototype Explodes Over Texas
Rick Jones wrote:
In sci.space.policy Jeff Findley wrote: For now, it's looking like that's not a big issue. So far, the Falcon 9R tests (up to the latest which had to be destroyed during flight, not landing) have all been successful during the landing phase. If this were an issue, I think we would have seen a failure sooner than now and it would have been during landing. Was the "during flight" test object an F9R or was that a Grasshopper? Neither really, it was "F9R Dev1" in the "F9R Dev" series, formerly known as "Grasshopper v1.1". The original Grasshopper was smaller and used one Merlin-1D. F9R-Dev1 didn't have all the stuff from F9 that the final product will have, it was built from an existing F9 v1.1 1st stage (previously used for F9 "qualification test") in which they put 3 Merlin-1D engines (F9/F9R obviously have 9) and various electronics and equipment as needed, I doubt they had the same electronics in it for all the different tests. They're now building a F9R Dev2 which sounds like it should be a lot closer to the final F9R but undoubtedly there will be more tweaking after the first Dev2 test. It's possible that if they hadn't been forced to blow Dev1 up, they would just have kept adding hardware instead of building a new Dev2. But I expect they're not surprised that somthing blew up, it happens in rocketry development even you can't necessarily predict WHEN. http://www.spaceflight101.com/spacex...t-updates.html |
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SpaceX Reusable Rocket Prototype Explodes Over Texas
In article , lid says...
Rick Jones wrote: In sci.space.policy Jeff Findley wrote: For now, it's looking like that's not a big issue. So far, the Falcon 9R tests (up to the latest which had to be destroyed during flight, not landing) have all been successful during the landing phase. If this were an issue, I think we would have seen a failure sooner than now and it would have been during landing. Was the "during flight" test object an F9R or was that a Grasshopper? Neither really, it was "F9R Dev1" in the "F9R Dev" series, formerly known as "Grasshopper v1.1". The original Grasshopper was smaller and used one Merlin-1D. F9R-Dev1 didn't have all the stuff from F9 that the final product will have, it was built from an existing F9 v1.1 1st stage (previously used for F9 "qualification test") in which they put 3 Merlin-1D engines (F9/F9R obviously have 9) and various electronics and equipment as needed, I doubt they had the same electronics in it for all the different tests. They're now building a F9R Dev2 which sounds like it should be a lot closer to the final F9R but undoubtedly there will be more tweaking after the first Dev2 test. It's possible that if they hadn't been forced to blow Dev1 up, they would just have kept adding hardware instead of building a new Dev2. But I expect they're not surprised that somthing blew up, it happens in rocketry development even you can't necessarily predict WHEN. It apparently wasn't a case of "something blew up" though, it appears to have been a case of "the onboard computer decided that a dangerous (to the public) situation was about to develop and blew it up as a precaution". A bit different from "something broke in the engine". http://www.spaceflight101.com/spacex...t-updates.html |
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SpaceX Reusable Rocket Prototype Explodes Over Texas
Robert, as your photo clearly shows the exhaust gasses off the pre-burner are steered out of a nozzle that is off axis. This will cause thrust vector problems unless all engines around the octaweb are firing, or unless engine gimbals can compensate for this. IIRC not all engines are to be firing on controlled decent. Do I remember that correctly?
Dave |
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SpaceX Reusable Rocket Prototype Explodes Over Texas
On Monday, October 13, 2014 4:56:57 PM UTC-4, David Spain wrote:
This will cause thrust vector problems unless all engines around the octaweb are firing, Or at least their pre-burners. I don't know if the Merlin allows pre-burner operation w/o engine ignition as well. Dave |
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SpaceX Reusable Rocket Prototype Explodes Over Texas
On 1/10/15 3:22 PM, Robert Clark wrote :
The latest Falcon 9 successfully launched today, but the SpaceX attempt at a first stage barge landing failed I know there is no good video of the crash because of fog and poor lighting. But does anyone know where we could see a video even of very poor quality? Alain Fournier |
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SpaceX Reusable Rocket Prototype Explodes Over Texas
On Sunday, January 11, 2015 at 12:04:09 PM UTC-5, Alain Fournier wrote:
On 1/10/15 3:22 PM, Robert Clark wrote : The latest Falcon 9 successfully launched today, but the SpaceX attempt at a first stage barge landing failed I know there is no good video of the crash because of fog and poor lighting. But does anyone know where we could see a video even of very poor quality? Alain Fournier space x must not have planned a success, or lighting etc would of been better |
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