View Full Version : SpaceX Starship launch
Scheduled less than one hour from now.
SpaceX (https://www.youtube.com/watch?v=-1wcilQ58hI)
NASA Spaceflight (https://www.youtube.com/watch?v=uouujjgkR3A)
Everyday Astronaut (https://www.youtube.com/watch?v=eAl3gVvMNNM)
O2
Stage 0 still standing. Success!
From T-00:10 (https://youtu.be/-1wcilQ58hI?t=2694)
O2
BladesNBarrels
04-20-2023, 08:08
Did I see this right?
R U D, Rapid Unscheduled Disassembly, ending for the Starship?
The commentators saying that clearing the tower was the only goal?
Well then, congratulations on reaching the goal.
Looks like it didnt separate. Kaboom.
Not bad for the first go.
The commentators saying that clearing the tower was the only goal?
No, that wasn't the only goal. But destruction of the launch facilities (what Musk quite accurately calls "Stage 0") would have been a severe setback.
Despite the RUD, the launch was hugely successful.
This isn't the first time SpaceX has had separation problems. On one of the early Falcon 1 flights (third?) the booster actually ran into the upper stage after separation, causing the launch to fail.
O2
Little Dutch
04-20-2023, 09:15
That was great. Thanks for posting the video link.
BushMasterBoy
04-20-2023, 09:44
Sponsored by Bud Light!
DenverGP
04-20-2023, 11:50
The public in general is use to seeing "nasa style" rocket development, where it takes decades to design and eventually produce a rocket that can fly. Because they spent so much time in the design phase, they are more likely to succeed on their test flight, but the rocket design is typically not able to be revised / updated easily. Spacex instead uses a "hardware rich" development methodology, where they iterate quickly and are willing to blow up and or throw away completed hardware to move the design faster. Before today's launch of Booster 7 / Ship 24, they already have several more boosters and ships ready or almost ready to fly. Booster 7 used a hydraulic system for flight vectoring control. The next boosters waiting already have electric motors for for the flight vectoring control. The design never stops. Before one launches, the next couple are already being produced with new/improved designs.
But for people unaware of the different approach, every rocket explosion (RUD) is seen as a major setback. I would bet that during the T-40 second hold, several issues were seen, and Elon told the team to go ahead with launch anyway. Having that rocket sitting on the pad waiting was slowing down the development process.
DenverGP
04-20-2023, 12:01
Ship 26 and Booster 9 are ready or almost ready to go, and include the new electric thrust vectoring among other changes. Ship 26 has no control fins or heat tiles. Same with Ship 27. They are skipping those pieces until they have demonstrated getting to orbit successfully. Parts of ships 28-34 are in various stages of assembly. For boosters, booster 9 is ready except for final install of a couple of engines. Boosters 10-17 are in various stages of assembly.
Since a couple people mentioned the hydraulic TVC, that's my bet as to what went wrong, or at least contributed to it.
After two minutes of flight with the heat of 33, I mean 27, I mean 26, errrr, 25 engines*, the hydraulic fluid might have boiled and that was the end of that - it had the directional stability of letting go of a balloon.
What absolutely amazes me is that this is the very first time a Starship booster has ever left the pad, and it was done under full fuel load and worked for nearly its entire flight profile!
O2
* I noted several occurrences of engine-rich exhaust during its flight.
The public in general is use to seeing "nasa style" rocket development...
My wake-up call that this is no longer my parents' rocket game was when, a couple of years ago, I tuned into one of the many Starship upper stage tests. At T-0 the engines ignited, then immediately shut down. I thought, well, they'll try again in about a week (a la NASA) and I turned the TV off.
...they launched like 30 minutes later and I missed it.
O2
For me, it was when the three rocket boosters landed, almost simultaneously, ready for re-use.
Just tricky cool.
In today's launch, what was tricky cool to me is that it isn't one big LOX engine, anymore. It was like 3 concentic circles of LOX engines, each delivering power (when required), available to deliver more power (when required) etc. Obviously, we couldn't have done 30 LOX engines 30 years ago, but today, we can. Too cool!
-John
BladesNBarrels
04-20-2023, 17:30
Thank you for the education.
I am a product of the 60's and I guess my vision of a trip to the moon is still stuck there.
My thoughts were along the line of what happens to the people riding in the starship, instead of celebrating the first test of the vehicle.
And....the world turns
The rocket collided with the 'firmament', or protective glass dome protecting the earth. I heard that theory bouncing around out there by Flat Earthers. I've run into a few of those guys, Wow!
DenverGP
04-20-2023, 21:19
Elon forgot the #1 rule of rockets: pointy end up, flamey end down.
The rocket collided with the 'firmament', or protective glass dome protecting the earth. I heard that theory bouncing around out there by Flat Earthers. I've run into a few of those guys, Wow!
Those folks are fun.
I thought that was a great test.
It's funny how expectations change. I remember 'the old days' when they were lucky a new design didn't blow up on the pad.
This was just a part of how SpaceX does development. They're not afraid of losing a rocket in their progression of a new design, as long as they learn something from it. They already had plans of making significant changes to the next iteration, so why not learn something else from the one that's already built?
The design of the Falcon 9 was similar. Now they routinely launch several times per week, including manned flights to the ISS.
Their biggest challenge may be redesigning the launch facility there at Boca Chica.
BushMasterBoy
04-22-2023, 04:34
Looks like this powerful rocket damaged the launch pad significantly. I wouldn't be surprised if the debris damaged some of the booster engines too.
https://www.thedrive.com/news/watch-spacex-starship-launch-annihilate-a-dodge-caravan-with-flying-debris
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