SpaceX's second attempt at orbital Starship launch ends in fireball
- Reference: 1682001191
- News link: https://www.theregister.co.uk/2023/04/20/spacex_launch_fireball/
- Source link:
Aside from a brief ground hold to finalize a pressure and purging issue, Starship's pre-launch sequence at Starbase in Texas went off flawlessly, but things went wrong at the 2 minute 50 second mark with the Super Heavy booster engines not cutting off, leading to the combined craft going into a spin instead of performing a single flip for separation.
A minute later, the whole thing went up in a fireball.
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[2]Youtube Video
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Today's launch attempt was the second of the week, with one on Monday being scrubbed due to a pressurization valve malfunction. SpaceX made the decision 17 minutes before launch to scrub liftoff in favor of performing a wet dress rehearsal, which involves fully prepping the ship for launch and ending the countdown sequence just prior to ignition.
The problem valve on the Super Heavy booster had some moisture in it, and it froze up when supercooled liquid oxygen was introduced into the tank, SpaceX said in pre-launch coverage.
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If everything had gone according to [6]plan , Starship and the 33-engine Super Heavy booster rocket would fly together for around three minutes, at which point the booster would perform a spin maneuver to position itself for a water landing in the Gulf of Mexico.
Starship was supposed to orbit Earth for around an hour, and re-enter Earth's atmosphere one hour and 17 minutes after liftoff. To spare any additional complications, SpaceX planned to forego a vertical landing in favor of a splashdown off the coast of Hawaii, but the craft never made it that far.
Starship hasn't had the most successful history, with its [7]previous launches mostly ending in failures described by SpaceX as "rapid unscheduled disassembly," a.k.a. exploding. SpaceX finally got a successful launch and landing out of Starship in 2021, the last time the craft has flown.
[8]SpaceX feels the pressure, scraps first orbital launch of Starship
[9]ESA's Aeolus wind-measuring satellite takes terminal trip into Earth's atmosphere
[10]SpaceX calendar marked with big red circle for 'first Starship launch' this month
[11]In wars of the future, national security won't end at space
Once it's placed into service, Starship will be the launch vehicle for the larger [12]second-generation Starlink satellites and has also been contracted by NASA to deliver astronauts to the Moon as part of the Artemis IV mission. That launch is scheduled for 2027, giving SpaceX precious little time to perfect Starship for human passengers.
But every disaster is a learning experience, said SpaceX quality systems engineering manager Kate Tice, who noted everything after liftoff was "icing on the cake" for the launch.
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"Success is anything we learn that helps us with future builds of Starship," Tice said. Hopefully they can build a better Starship soon, or NASA might have to look elsewhere for its Moon mission craft. ®
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[2] https://www.youtube.com/watch?v=-1wcilQ58hI&t=1s&ab_channel=SpaceX
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[6] https://www.spacex.com/launches/mission/?missionId=starship-flight-test
[7] https://www.theregister.com/2023/04/17/spacex_scraps_first_starship_launch/
[8] https://www.theregister.com/2023/04/17/spacex_scraps_first_starship_launch/
[9] https://www.theregister.com/2023/04/19/esa_aeolus_satellite_shutdown/
[10] https://www.theregister.com/2023/04/11/spacex_starship_launch_april/
[11] https://www.theregister.com/2023/04/06/cybersecurity_space_satellites/
[12] https://www.theregister.com/2022/08/01/spacex_satellite_brightness/
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[14] https://whitepapers.theregister.com/
Starship hasn't had the most successful history?
It's called testing, the results being used to improve the next one.
Re: Starship hasn't had the most successful history?
Yes, but it was fun while it lasted. Hopefully they got enough data to diagnose the issue and it is not something to fundamental. They seemed to have at least 4 engines that did not stay lit and produced the occasional outburst.
I'm most interested in how the launch pad survived as they seem to be setup to replace rockets faster then they could rebuild the launchpad.
Re: Starship hasn't had the most successful history?
"I'm most interested in how the launch pad survived "
AFAIK no.1 success criteria for the flight was not to trash the launchpad, then lift-off, both of which they seem to have achieved
Re: Starship hasn't had the most successful history?
Not too good according to pictures on [1]Twatter .
[1] https://twitter.com/labpadre/status/1649062784167030785?s=61&t=CJ4DuGqKva_sEJ2C6PBn9g
Re: Starship hasn't had the most successful history?
Sure. The only question is : how many more tests before getting something reliable ?
Not knocking it, SpaceX has largely been the most open and honest companies there is. It admits failure when failure happens, and I'm sure there are many valuable minds working the problem.
Musk not having a say in it more than likely has a lot to do with its existing success.
But hey, a bit of gentle ribbing can't hurt, now can it ?
So, carry on !
Re: Starship hasn't had the most successful history?
SpaceX ... It admits failure when failure happens
What else could they do? World+dog saw their rocket blow up shortly after launch.
However, a mouthpiece for His Muskiness - peace be upon the Mighty One - did their best at dissembling. Saying everything else after the rocket cleared the tower was icing on the cake is like claiming Texan hospitality was the icing on the cake when JFK visited Dallas.
Re: Starship hasn't had the most successful history?
Yes, but only to a degree. SpaceX finances this through government contracts and is, thus, somewhat insulated from the commercial risks. I think some of the other newer companies have even better records, because they don't have such deep-pocketed sponsors.
Even with its recent failures on Vega and Ariane 6, ESA has an enviable record on launches and some of the very hard science and engineering associated.
Re: Starship hasn't had the most successful history?
Not to mention that this was the first ever launch of the Booster, so its launch history started today.
Was a good flight - was interesting to see the raptors cut out on the booster... lots of engines does provide redundancy, but only if you can control it.
Definitely! I think there were 5 engines out by the end of it, would have been neat to see how the "soft wet" landing went with those engines out. At any rate, redundancy is exactly what you want when people start climbing on board these things ;-)
Complexity ≠ Reliability
The problem you have with large numbers of engines is that the associated plumbing can be very, very complicated. Rockets don't like complicated - the prefer things to be as simple as possible to minimise the chances of something going wrong.
The Russians tried building a rocket (N1) with a large number of engines and they ran headlong into the problems caused by the complex plumbing. Its most spectacular failure saw a Rapid Unscheduled Disassembly event of not just the rocket, but the entire launch pad complex - took the Russians 18 months to glue the bits together again.
Re: Complexity ≠ Reliability
Redundancy only makes sense when you are confident that one failure does not start a cascade affect - like an exploding engine or when your data centre backup generators can't carry the load of all systems rebooting at once.
Re: Complexity ≠ Reliability
When they were desiging the Harrier jumpjet, they realised the safest design was having just one engine rather than multiple.
Re: Complexity ≠ Reliability
The plumbing isn't too bad on Super Heavy, the Raptors are directly connected to the bottom of the methane tank and a spider/octopus arrangement feeds them oxygen. One of the major problems with the N1 was the wiring, many, many individual wires carrying analogue sensor information running from each engine to the control unit and inevitably some of them got connected to the wrong terminals resulting in perfectly good engines being shut down because of sensors on other engines showing fault conditions. The individual Raptor engines each have their own control units built in and talk to the central controller(s) via digital data buses.
Cloud computing! What happens when you run your test flights on AWS EC2 compute platform
AWS EC2 servers see a massive spike in amounts of data transferred, which, of course, flags security systems. and cuts the transfer when SpaceX's credit buffer goes past $1 Million in fees mark, after only 3 minutes, thus, preventing stage separation.
Well, you can imagine this as a future scenario at least...
Re: usage of AWS EC2 compute platform
Well... they gotta leave some CPU cycles for the website scrapers and hackers that they host and don't do anything about.
I've blocked pretty well all AWS hosts from accessing my website because of the scraping and hacking (255 ways of trying to access myphpadmin for starters)
Amazon is a POS company.
Once again the simpsons predict the future.
Seeing as how dangerous and pointless this is,its no wonder that nasa decided barney gumble and homer should be the next generation of astronauts.
Thunderbirds are Go!
Am I the only one that thinks Elon’s spaceship looks like something from Thunderbirds? Or maybe Captain Scarlet?
Re: Thunderbirds are Go!
Fireball SpaceXL-5
Re: Thunderbirds are Go!
Well I think it looked like a giant cock. Not unlike Elon Musk, come to think of it.
Re: Thunderbirds are Go!
The thing that usually gets the 5 year old me excited is the shot of the Earth as TB3 enters into orbit, with what looks lke a gas flame as one of the engines continuing to fire & how "close it is to the real"* shots of the Raptors engines firing in space from camera's mounted near them.
*Given the limitations of 60's filming & granted the modelwork & filming shots in any of Gerry Andersons productions were miles ahead of other programs of that era.
Re: Thunderbirds are Go!
More like the ship in the cinematic masterpiece (sic) Flesh Gordon.
Why all the cheering before the 10 second countdown?
Was there a streaker or something? To me cheering before ignition is bad karma.
Re: Why all the cheering before the last 10 seconds?
I think that was when they restarted the countdown - it had been on pause at around the thirty second mark for a while (not sure, I skipped forward rather than watch the whole thing)
I tried making a cup of tea earlier and burnt down the house, but everything after switching the kettle on, was just icing on the cake.
Woooooooo!!!! Go kettle!!!!