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Posted by ls612 1 hour ago

SpaceX Catches the Starship to end Flight 15(x.com)
384 points | 213 commentspage 2
Narishma 1 hour ago|
Do we know why they didn't try to catch the booster?
ryzvonusef 1 hour ago||
https://x.com/elonmusk/status/2121648438144024943

booster was low on fuel, plus no mood of risking tower with boom, boosters are cheaper than towers.

bahmboo 10 minutes ago||
Cool. And people thought he wrote this himself!
DarmokJalad1701 1 hour ago|||
Slight underperformance in the engines resulted in the the booster not reaching where it was supposed to be and the GNC systems automatically aborted to the gulf for safety.
blondie9x 6 minutes ago|||
Do we know what sea life just died as the booster exploded? What are the impacts to the Texas Gulf when a booster detonates into the ocean?
proee 1 hour ago|||
Two reasons floating around. 1.)They lost communication with tower 2.)They ran out of fuel for safe land.

source: Scott Manley https://youtube.com/shorts/m2oGDCvDmdE?si=0AlX8sgHDihXCED6

inglor_cz 1 hour ago|||
"Slightly low on fuel."

If I understand correctly, the margin was tight enough not to take the risk of damaging the tower.

quotemstr 1 hour ago||
And if the landing footage is any indication, it sure looks like they would have made the catch anyway if they'd gone for it.
baq 1 hour ago|||
landing footage shows exactly why they didn't attempt the tower catch - the final braking burn was engine rich (green tint), it didn't blow up, but there was a respectable chance of it just crashing into the tower running on less than fumes
ssl-3 49 minutes ago||||
The goal, as I understand it, is to return the booster with as little fuel as possible at time of catch -- and not run short.

The booster footage indicated to me that its engines turned off, and then the body of the booster imploded, before it touched the ground and then became the expected fireball.

I'm definitely not a rocket scientist, but this series of events leads me to believe that the fuel was absolutely exhausted.

dylan604 25 minutes ago||
Sounds like the final boom was intentional from control
ssl-3 22 minutes ago||
Perhaps it was, and if so: It occurred subsequent to the implosion.

(In case that distinction is missed, I do mean "implode" as the antonym of "explode".)

inglor_cz 1 hour ago|||
Their risk tolerance would probably be greater if both towers were fully operational. But any damage to the only functional tower during booster catch = an automatic abort to the ship catch one day later, and the ship catch is what was really interesting at this point of development.
dylan604 24 minutes ago||
The previz imagery of their plans for the Louisiana coast showed pairs of towers dotting the coast. At first I thought they were for alternating the cadence of launches, but now I wonder if one is to catch the booster and the other to catch ship.
panick21_ 1 hour ago||
Apparently the booster signaled it didn't have enough fuel to risk it. Either because it consumed more then expected on the way up, or a measurement error potentially.
Laremere 1 hour ago|||
At the last moment the exhaust turned green. That's consistent with the fuel running out, the engines running oxygen rich, and subsequently "engine rich". So I would put my money on actually running out vs a measurement error.
bavell 1 hour ago|||
I heard somewhere the engine efficiency is still somewhat variable so they burned more fuel than anticipated.
quotemstr 1 hour ago||
That's basically what Musk said, yes: that they need to work on both engine performance and performance consistency. He said they'd be cutting off the main engines one second sooner to provide more margin for boost-back.

Amazing that a one-second difference can matter, but those things go through tons of fuel every one of those seconds!

ryzvonusef 1 hour ago||
Holy ship, it was picture perfect capture!
anuptalwalkar 55 minutes ago||
This is absolutely incredible!! I can’t wrap my head around this.
pxmpxm 19 minutes ago||
You can see a plane passing underneath it at video timestamp 22:44:43!
andsoitis 1 hour ago||
That was incredible to watch!

Huge congratulations to the team.

HAL3000 23 minutes ago||
Nice! I wonder how the engineering involved here compares to the engineering behind manufacturing TSMC chips (including ASML machines, Zeiss optics etc.). Which is harder?

As it seems building rockets has historically been a capital intensive business with low profits and limited demand, so there just wasn't much competition in the space industry.

Catloafdev 10 minutes ago||
Many countries are capable of space flight & deploying satellites.

Only a few companies in the world can manage the top-tier fab processes for modern chips.

Only one company in the world has successfully caught a rocket.

It's hard to directly compare, safe to say they are 2 of the pinnacle examples of modern human engineering.

MPSimmons 17 minutes ago|||
I would say that they're orthogonal except for the requirement for exacting results and standards. Doing anything once is hard. Doing anything repeatably is hard^2.
smurf9852 19 minutes ago||
Chips are harder.
lovvtide 1 hour ago||
We witnessed history today
comrade1234 1 hour ago||
Ah man I just missed it. The live feed is just stock footage. Any links to the catch?
nomilk 1 hour ago||
Last few minutes here:

https://x.com/spacex/status/2121316300702056595

tim333 1 hour ago||
https://youtu.be/jHlpfNSpBmw?t=3233
ceejayoz 1 hour ago||
Damned impressive.
yokoprime 1 hour ago|
That was incredible impressive, what a feat of engineering!
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