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/sci/ - Science & Math


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12444037 No.12444037 [Reply] [Original]

What went wrong, scientifically speaking?

>> No.12444070
File: 35 KB, 615x258, 00-10-34.jpg [View same] [iqdb] [saucenao] [google]
12444070

>>12444037

>> No.12444080

>>12444037
it blew up

>> No.12444097

>>12444037
reuseable rockets are a meme. Normies throw out their phone every year and get a new one and Elon wants to sit here using the same thrusters time and time again??

>> No.12444100

>>12444037
nothing, it excelled at everything it was supposed to do.

>> No.12444108

>>12444037
Nothing I suspect. The engines powered off sequentially and then those two 'failed' engines had the fuel left to manage the landing.

It came in too hard and exploded like a fucking Gerry Anderson finale that will at least double the PR coverage tomorrow. Probably more like a power of 10 increase.

>> No.12444117

>>12444100
99%+ success. Fantastic.

>> No.12444133

>>12444037

One engine failed during landing, green flame means that the other engine was getting corroded by exhaust flame. The first starhopper also experienced corrosion during landing, so I don't think that was unexpected.

>> No.12444191

Fuel pressure got too low, causing one engine to go way oxygen-rich, which in turn made it go engine-rich as well
The green flame was the engine burning itself up
The solution is simply to bring more fuel in the header tank

>> No.12444216

>>12444037
nothing really. the only way it would have been worse was that the rocket would have exploded right on lift off, plus the issue that made SN8 explode was more or less detected on the spot, so everything went better than expected.

>> No.12444239

>>12444117
That was one hell of a 1% though.

>> No.12444240

>>12444037
is he ok?

>> No.12444268

>>12444097
yeah because a phone that costs $10 to manufacture is the same as a rocket engine that costs upward of $1 million

>> No.12444271

>>12444037
love how it wiggles its engines there at 0:03

>> No.12444321

>>12444037
SpaceX always delivers the best explosions. Fireworks are a burger past time after all.

>> No.12444324

>>12444321
There should have been metal playing during that explosion.

>> No.12444328

>>12444191
or increase the pressure in the header tank

>> No.12444405

What Isp does an Engine Burning engine get?

>> No.12444415

>>12444037
The main test was for the flip and bellyflop which was a great success.

I suspect that in the final analysis the reason for the underpressure will be ullage from the bellyflop.

>> No.12444426

>>12444324
here you go
https://www.youtube.com/watch?v=c8qrwON1-zE

>> No.12444428

>>12444037
fuel pressure was low so one of the engines started running oxygen-rich (bad) and ate itself.

>> No.12445794

>>12444133
>>12444191
The green flame was TEA-TAB, the hypergolic ignition fluid. One (or two?) of the engines couldn't get enough fuel to stay lit, so the computer apparently chucked all of the ignition fluid out in a desperate attempt to light it (which failed, because there was no fuel to light in the first place, but hey, computers).

>> No.12445803

>>12445794
retard, Raptor doesn't use exotic ignition fluid

>> No.12445854

>>12445794
When I heard about the green flame I thought it might be TEA-TAB but watching the footage it's clearly the copper injector plate just based on the time she's green for.
Also as >>12445803 said they run spark (more like arc) ignition.

>> No.12445865

>>12444324
LAUNCH THE POLARUUUUUUUUUUUS
https://youtu.be/IR63sFjHc4Y

>> No.12445873

>>12444097
for a trip to mars it's kinda required

>> No.12445879

>>12444428
You could say the propellant was engine-rich

>> No.12445896

>>12444037
>tfw you have [math]-100 \Delta v[/math]

>> No.12445900

>>12444037
out of fuel or oxidizer?
turbo pump failure?
something else?

>> No.12445912

>>12444080
Based and succinct pilled
/thread

>> No.12445915

>>12445900
Green flame looks like copper, the only copper in the combustion chamber is the injector head. My guess is oxygen rich + heat = oxy torch burning injector head.

>> No.12445939

>>12445900
Elon says the fuel header had insufficient pressurization

>> No.12446023

>>12445939
i wonder if the tank pressure was too low or the pump failed then.

>>12445915
that could throw off the mix and cause what you say

>> No.12446028

>>12446023
tank pressure too low, there's no booster pump for the Raptors or the tanks
probably some glitch in the autogenous pressurization system

>> No.12446040

>>12444268
A $600 phone for lower middle class compared to $1 million to a multibillionaire. Yeah, it is a lot more expensive to get a new phone relatively speaking

>> No.12446106
File: 75 KB, 605x316, diving-sparger-system-bubble-system.jpg [View same] [iqdb] [saucenao] [google]
12446106

>>12444080
>it blew up

Well there it is... the answer.

They land in the most fucked up way imaginable... literally thrust at the very end of a fall, hoping velocity falls to near zero at the moment of impact.

Dumb fucks, just land in a shallow bubble water area and recover the rocket.

>> No.12446119

>>12446106
you can't build an underground pool at the beach due to the water table and an aboveground pool would be too large

>> No.12446302

>>12446106
That's essentially the same way an aircraft lands. What's so fucked up about it?

>> No.12446345

>>12446302
>That's essentially the same way an aircraft lands.

WTF!?!?!
Airplanes do NOT land like that!!
NO AIRPLANE lands like that!!

>> No.12446456

>>12444070
He is probably furious

>> No.12446563

>What went wrong, scientifically speaking?

It fucking exploded.

>> No.12446571
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12446571

>>12444239

>> No.12446572

>>12446040
Rocket reusability is about making it cheaper for everyone else to send stuff up to space, not just the rocket companies. Space manufacturing will probably be the first big space business once rocket launches become cheap enough to justify. There's a lot of things that are harder or just plain impossible to manufacture without a microgravity environment

>> No.12446590

>>12446106
They've already succeeded at vertical landing before, so this is just an optimization problem, not a hard engineering problem.

>water
This is also a test run for mars. No water crutches on mars.

>> No.12446600

>>12444037
omg did they died???

>> No.12446601

>>12446106
They have like 60 successful falcon stage 1 landings. It's not just some gay hope.

>> No.12446662

>>12444037
>>12444070
>>12446028
from watching videos and reading random comments from people this is probably what happened in more detail:
>header tanks are underpressurized probably due to fucking up the thing that's supposed to pressurize the ullage from the gas storage tanks
>raptors start up, are fine for a bit because there's residual methane+lox in the inlet lines from the main tank burn and there's enough header tank pressure to run the turbopump
>as methane is drained from the tank with nothing to fill the ullage, pressure drops even more until the turbopump starves
>methane turbopump can no longer feed itself, O/F ratio spikes
>methane is no longer running in the regen cooling circuit, engine nozzle begins to overheat
>raptor is now running extremely ox-rich and hot
>oxygen decides to take the next available fuel
>engine bell melts and copper liner begins to burn in the oxygen causing green flame
>raptor is very briefly the world's only full-flow staged combustion hybrid liquid+solid tripropellant methaloxcu engine with a dual ablative and regenerative nozzle
>hits the ground and explodes

>> No.12446670

>>12444239
KEK

>> No.12446691

>>12446600
ayylon is kill. press f.

>> No.12446735

>>12446345
helicopters
F-35
Harrier

>> No.12446768

>>12444240
He's gone to the great big stable orbit in the sky

>> No.12446777

>>12446456
>4 out of 6 objectives reached with the first prototype
you are a brainlet

>> No.12446780

>>12444097
>phones = rockets
why are there so many retards here recently?

>> No.12446789

>>12445794
Nah. It started oxidizing copper in the engine assembly. All the engines performed nominally. The failure was caused by low pressure in a fuel tank.

>> No.12446826

>>12446777
which ones did they fail? I count only one.

>> No.12446888

>>12446780
/pol/ leaking out to every other bord is my best guess

>> No.12446890

>>12446888
board* how ironic

>> No.12446902

>>12446662
>raptor is very briefly the world's only full-flow staged combustion hybrid liquid+solid tripropellant methaloxcu engine with a dual ablative and regenerative nozzle
Based,

>> No.12446903

>>12444239
is this your first time watching a rocket explode?
>>12446571
>>12446670
?

>> No.12446933

>>12445854
>>12445803
>>12445794

The static tests of Raptor used TEB. Its a proven ignition system I wouldn't be surpised if they use it rather than an untested scale-inefficient spark system. We will find out someone going to ask for sure. Other reason I suspect TEB is the length time and the purity of the green rocket plume, only right at the end did the mach banding etc. break up. I think they dumped all burnable shits right at the end in a last-ditch attempt to try to keep things up.

>> No.12446936

>>12446933
Elon is on record that Raptor hasn't used TEA-TEB for years, at least since the subscale Raptor test days

>> No.12446943

>>12446601
Once in a while they fail that too though.
Will be ever be safe enough for passengers?

>> No.12446974

>>12446936
If that is the case its might be burning oxygen rich (liquid oxygen more finicky = more reserve) and chewing on the chamber walls. For several seconds. The propellant flow in these things is hundreds of kilograms per second so maybe dozens of kilograms per second of supplemental emergency metal propellant (chamber wall).

>> No.12446978

>>12446974
it would require extremely little copper to burn in order to turn the entire flame green
I recommend you experiment with a bunsen burner and a strip of elemental copper

>> No.12446995

>>12444037
Here, nigger

https://www.youtube.com/watch?v=egHxiX40eJY

>> No.12447096

>>12444037
one engine is off so the rocket didn't slow down

>> No.12447117

>>12447096
wrong

>> No.12447141

>>12446572
Like what.

>> No.12447148

>>12446888
Waste of digits. I've seen some of the most midwitted things on this board for years on years... nothing to do with /pol/, at least they're easily detected unlike the native midwits of this board.

>> No.12447152

The depressurization mitigation didn't pressurize

>> No.12447173

>>12444070
I don't get it, how these supposed geniuses working at spacex couldn't calculate this better.

>> No.12447180

>>12446662
FULL FLOW STAGED COMBUSTION HYBRID LIQUID SOLID TRIPROPELLANT METHALOX-CU ENGINE WITH DUAL ABLATIVE REGERERATIVE NOZZLE

fixt

>> No.12447211

>>12446601
There is a lot more lower middle class people than billionaires though, isn't there?

>> No.12447215

>>12446662
>raptor is very briefly the world's only full-flow staged combustion hybrid liquid+solid tripropellant methaloxcu engine with a dual ablative and regenerative nozzle

Yes.

>> No.12447222

>>12446888
what a waste of digits

>> No.12447257
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12447257

>>12446662
This is what happens with reignitions. They are uncertain. They need ullage. But that is hard to accomplish when you are flipping and flopping and doing stunts.

I don't see the Martian astronauts surviving this. Better he just launches a more classic skycrane descent stage on top of superheavy, and lift off in a separate ascent stage to avoid flying rocks, as Apollo and Chang'e 5 did.

>> No.12447315

>>12447257
>I don't see the Martian astronauts surviving this
...what exactly don't you see them surviving?

>> No.12447322

>>12447257
They simply had pressure issues in the methane header tank, nothing impossible to solve. Header tanks are installed to avoid ullage issues, so this was just a minor hiccup in a very successful test.

>> No.12447330

>>12444117
99.999....% success!

>> No.12447334

>>12444037
IIRC the belly flop and restarting of the booster is like unique in history so we lived the first step in a new way of spaceflight ?

>> No.12447337

>>12444080
I beg to disagree.

>> No.12447350

I mean what went wrong is a vague statement the mission was a success. A shitty example would be if you wanted to launch a rocket to test if the fins would work properly at a certain speed but you also made the rocket do a bunch of other shit after this mission was done that didn’t have to do with main mission because why not. If you successfully tested the fins but failed the other shit was the mission a failure? No.

>> No.12447349

>>12446590
spaceship can hold 100 tons. Just bring 100 tons of water to create a lake on Mars for future spaceships

>> No.12447353

>>12444037
lol, I love how the internal camera feeds just freezes

>> No.12447359

>>12447349
>lake starts boiling instantly
>then freezes
>the rest of the water sublimates

>> No.12447369

>>12447359
that's why we need many spaceships

>> No.12447377
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12447377

>>12446662
>raptor is very briefly the world's only full-flow staged combustion hybrid liquid+solid tripropellant methaloxcu engine with a dual ablative and regenerative nozzle

>> No.12447400

Not enough peer reviewing

>> No.12447413

>>12446106
>Dumb fucks, just land in a shallow bubble water area and recover the rocket.
Would be counter-productive since they're pitching this thing to NASA for use in the Artemis program and the Moon doesn't have convenient pools of water to splash down in.

>> No.12447415
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12447415

I think we all know what happened.

>> No.12447422

>>12447415
It's a fun meme but when they start actually messing with in-orbit refueling they should really watch out.

>> No.12447427

>>12446662
>full-flow staged combustion hybrid liquid+solid tripropellant methaloxcu engine with a dual ablative and regenerative nozzle
Waow

>> No.12447434
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12447434

>>12447315
>what exactly don't you see them surviving?

>> No.12447438

>>12447434
A test vehicle that malfunctions? Yeah that's exactly why there are no people on board. I don't understand your point

>> No.12447442

How high could the SN8 have gone without the booster? Man, imagine if it could go to orbit and then land, and the big ass booster was just for moon or mars missions.

Now that they've proven the concept using a full-scale vehicle, couldn't they make a fully-reusable Falcon 9 upper stage too? With fairings that open to deploy the payload, and then close back for landing.

>> No.12447446

>>12447434
COMPLETE SUCCESS!

>> No.12447447

>>12447442
SSTO is technically possible with Starship. I don't think it can carry any payload however.

>> No.12447448

>>12447438
They're gonna have to launch just a landing vehicle with parachutes my buddy. Ok they may save a few million dollars by doing that when launching cargo, but it's way too risky of a method for landing people.

>> No.12447454

>>12447448
no no no you silly goose

>> No.12447457

>>12444070
Personally I think Mars is overhyped and we should be focusing on the Moon.

I appreciate he wants to have his name attached to the FIRST™ landing on Mars instead of the seventh landing on the Moon though.

>> No.12447474

>>12447454
Trust me bro. There's a reason why they don't propulsively land the dragon even though they can

>> No.12447476

>>12447474
>Trust me bro.
No thanks

>> No.12447478

>>12447474
yeah its because nasa are gay little bitches

>> No.12447484

>>12447334
Yes and no.
Belly flop wasn't a huge deal. The act of rotating from vertical to horizontal for the flop, then reorienting into vertical for landing was the big deal.
Engine relights aren't a massive deal either, because the Merlin engine used in the Falcon9 stages can relight. The *raptor* relighting was the highlight because it uses a different method for lighting up than other engines. Raptors use their Methane/LOX thats on board to relight instead of secondary fuel like Merlins and other rockets. That means they can relight themselves all day long.

>> No.12447485

>>12444037
Something went wrong on the way up, which caused a fire in the casing. Maybe that fire ruptured a pipe or something, which meant an engine couldn't get the pressure. Just keep the rocket away from fires and it should be okay.

>> No.12447489

>>12447415
Is that thunderf00t driving? A+ to detail

>> No.12447495

test

>> No.12447499

>>12447448
that crash was easily survivable

>> No.12447503

>>12447434
It touched the ground very softly, stayed in one piece for a few milliseconds, and then boom
If the welds or whatever hadn't ruptured, it would have been a hard landing, but survivable

>> No.12447504

>>12444070
i like your funny words magic man

>> No.12447508

>>12447484
>belly flop wasn't a bid deal
correct, skydivers do it all the time
it was a good validation though, now we know that skydivers do it all the time and so can you, which wasn't certain before
>multiple reorientations for a flight
been done, still cool, and never on something that got beyond prototypes and proofs of concept

>> No.12447510
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12447510

>>12447489

>> No.12447516

>>12444070
This, the problem is known and they will correct it for the next test and iterate from there. That has always been the plan, rapid iteration, testing, failing, retesting and SpaceX is doing a hell of a lot better the the Chinese who rain spent rocket boosters on their own citizens or NASA that just got around to test firing a rocket they've been working on for 40 years a few months ago.

>> No.12447522

>guy makes a living making shitty rockets that look straight out of 70s science fiction pulp novels and crashing them on purpose
>bugmen cheer on and give him money

Somehow this feels like a betrayal, like this is worse than onlyfans. I don't want to live on this planet anymore.

>> No.12447529

>>12447522
You can cry when starship touches down on the moon

>> No.12447530

>>12447489
Thunderf00t is the avatar of GenX mediocrity
His entire "debunker" persona is based on a hatred of the exceptional and heroic

>> No.12447536

>>12447415
he can't keep getting away with it

>> No.12447540

>>12444037
>>12444070
LMFAO!

>> No.12447554

>>12444070
>cope I almost feel bad for the guy, with all that money he's still hated by people on the left and right and at best he's a fucking meme

>> No.12447555

>>12447522
>I don't want to live on this planet anymore.
that's why we simp for the guy

>> No.12447565

>>12444037
I wonder if they will be having it swing around that violently when they have astronauts in it? The astronauts will be nicknaming it the "vomit comet".

>> No.12447570

>>12444037
Fluid dynamics.

>> No.12447617

>>12444037
>>12444070
Flawless victory!
I can't believe we landed on Mars muskbros, woohoooo!

>> No.12447636

lol tall poppy syndrome thread.

>> No.12447646

>>12447484
K thanks !
Got places to learn more about it, a space news in general ?

>> No.12447655

>>12447565
Doesn't really look worse than a carnival ride. On the upside, otherwise the descent looks way slower and gentler. Look how it's just floating down https://twitter.com/astro_amadeo/status/1336819412951818242

What if they added bigger wings? How much slower would it go

>> No.12447661

>>12446735
None of those freefall until almost at the ground and then turning on their engines

>> No.12447665

In case of parachute failure, can the dragon 2 give a little throttle to slow the fall ? like the shield of the soyuz

>> No.12447671

>>12447484
>Engine relights aren't a massive deal either, because the Merlin engine used in the Falcon9 stages can relight.
Except that is a massive deal. The completely different reusable relighting system which does not rely on a limited amount of TEA-TEB pellets is a huge fucking deal.

>> No.12447675

>>12447503
and it landed without the legs deploying. Hard to say if it would have not exploded if they were there to absorb the impact.

>> No.12447676

>>12447474
Because bitchass NASA did not want them to do it because it would make Boeing look even worse.

>> No.12447679

>>12444037
nothing
it all was fine
but it ran out of fuel
when you run out of fuel you don't try to redesign your car or blame car design
it functioned 100% perfectly
when you run out of fuel, your car is supposed to stop.
if a plane runs out of fuel, it glides
if a helicopter runs out of fuel, it glides
if a rocket runs out of fuel it continues its parabola
which is did
so scientifically i would say "altitude was wrong" when it ran out of fuel.

>> No.12447686

>>12447679
> it didn't run out of fuel!!!!
go back to rebbit
neither do cars
there's plenty of fuel in the car when it "runs out"
but not enough to cycle
same here - there was fuel, but not at pressures needed to function
they didn't come down fast enough - which lead to them coming down too fast
fuck jannies and fuck that nip for censoring gbtr

>> No.12447691

>>12447665
It can technically land with the abort engines though that has not been manrated.

>> No.12447700

>>12447691
Is there a lot of fuel capacity ? it always appeared to me as too small/few to maneuver or do corrections

>> No.12447722
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12447722

>>12446662
>>raptor is very briefly the world's only full-flow staged combustion hybrid liquid+solid tripropellant methaloxcu engine with a dual ablative and regenerative nozzle

>> No.12447732

>>12447679
>but it ran out of fuel
well obviously, all the fuel exploded

>> No.12447738
File: 2.99 MB, 720x361, Sea Dragon.webm [View same] [iqdb] [saucenao] [google]
12447738

Why don't they do these sorts of tests at sea? I understand they ultimately want to be able to land on solid ground but wouldn't aiming just off the coast in (relatively) shallow water decrease the chances of the whole thing going boom if something goes wrong right at the end?

>> No.12447742

>>12447679
didn't necessarily run out of fuel. Methane didn't get to the engine. The explosion at the end was methane rich, probably the fuel use calculation was spot on.

Most likely here was a bubble or a clot (liquid) in the lines, baffles and heat exchangers that messed up the fuel flow enough to cause one or two engines and/or emergency remediation systems to spaz out.

>> No.12447743

>>12446662
Close but the only copper is the injector head, not the nozzles

>raptor is very briefly the world's only full-flow staged combustion hybrid liquid+solid tripropellant methaloxcu engine
kek

>> No.12447745

>>12447738
Makes recoving the parts much harder, the best way to tell want went wrong is data feed, the second best way is looking at pieces.

>> No.12447753

>>12447745
Oh good point, I hadn't thought of that.

>> No.12447758

>>12447732
see
>>12447686
also: you're not clever
another one:
>>12447742
see:
>>12447686
ask yourselves why did I post this?
because I knew two reddit twats would reply
> NO IT DIDN'T!!
unless you want to assert that no car that runs out of fuel _literally_ runs out of fuel, then go ahead
I take run out of fuel to mean "the fuel was too low it could not cycle"
in cars we know what that is
in rockets we also know what that is
if you want to advertise your ignorance and reqqitor qualities, well done, you've done so
IT DONE RAN OUT OF FUEL OK?

>> No.12447763

>>12447738
Why no "new-space" companies tried this rocket configuration and the whole project ?

>> No.12447769

>>12447763
Do you have any idea how much REEEE'ing such a launch would produce from various marine life protection organizations?

>> No.12447770

>>12447758
for those still confused:
spacex literally said
the fuel pressure got too low in the tanks at the end and could not cycle as needed
... it ran out of fuel
when you run out of fuel, you don't ask "what failed in the car"
therefore nothing went wrong with the rocket
the launch was too long / too short on fuel.
what happened to the rocket? it exploded
what was wrong with the rocket? nothing
then why did it explode?
the launch had too little fuel or the exercise went over fuel requiremen
> but that's
what happened to the car? it ran out of fuel
what was wrong with the car? nothing
> then wh
because the trip was too long between fuel stops

>> No.12447773
File: 336 KB, 1600x1396, heatshield.jpg [View same] [iqdb] [saucenao] [google]
12447773

the heatshield mounting mechanism worked until rud. looks like they figured that thing as well

>> No.12447781

>>12446662
yeah this - i forgot the refill issue, could this be it or that the pressure drop was they had the pressures go too low thru use? how low can they go before not cycling?
I'm guessing it wasn't full, but the amount they thought they needed

>> No.12447795

>>12447769
Isnt there fucked up cove or tiny sea with no important sea life ?
like where the US and France blew up nukes, the hole is already there and no one to complain (anymore)

>> No.12447799

>>12447763
I think it is just too big for current commercial uses, great if you're still trying to compete with the Commies for who can dominate space and need to lift huge payloads into orbit really quickly but not so much for routine satellite launches. The hundreds of metric tons of payload is a lot to lose in terms of $$$ if one of those things fails, which would also make it dangerous for commercial use, it is a very 'All Eggs - One Basket' launch system too. Investors probably not too keen on a launch system that could bankrupt the company with a single failure.

Not sure it'd be safe enough to ever be rated to carry personnel either, since a part of what makes it potentially so cheap is the use of very basic rocket technology, the 'Big Dumb Booster', which wouldn't have all the safety features than modern rockets do.

>> No.12447800

>>12447770
It stopped running while it still had fuel. It didn't run out of fuel, there was fuel in the tanks. Had fuel. Did not not have fuel. The engines might not have had fuel, SN8 had fuel enough to make quite nice RUD just also had a fuel problem.

>> No.12447803

>>12447770
tl;dr fluid dynamics is a bitch.

>> No.12447809

>>12447799
>not so much for routine satellite launches
Talking about those.
I saw there's a shitton of former NASA guys creating their companies. Even a one in germany iirc.
Do they make money or it's just a coping mechanism from NASA and ESA to have players in the game in case the institutional space industry crumble with the rest of Western states ?
Also, isnt it a bit retarded to launch from germany, it far from the equator line

>> No.12447814

>>12447770
Couldn't it be that something in or related to the methane header tank malfunctioned causing the pressure to drop? There are reasons to believe it still had lots of fuel on board, although it may have been in the main tank instead of the header the engines were using at the time

>> No.12447815

>>12447377
kek

>> No.12447826

>>12447809
Doesn't matter where you have your company. You can launch from fucking anywhere you have an agreement.

>> No.12447828

>>12447809
I thought most ESA launches actually happened in S.America

>> No.12447839

>>12447814
I thought it might have choked a bit from bubbles in the piping caused by the sloshy sloshy acrobatics, you know, like flipping a car upside down and getting its fuel pump suck in air.

But the explanation of pressure drop might indicate there really was insufficient fuel to keep things going.

Either way the ratio of methane:oxygen fucked up and the oxygen started burning the closest thing it could find which probably was the engine.

>> No.12447863

>>12447565
think it might have to. my extensive kerbal expertise says flipping a rocket 90 degrees is a terribly unstable regime to be in

>> No.12447866

>>12447799
You have completely missed the point of Big Dumb Boosters, it isn't that they don't have safety features (what safety features can a booster have other than avoiding solid fuel) but instead of trying to get a couple more ISP for tens of millions you just go bigger to use simpler engines.
Reading this you might notice that the first full-flow staged combustion engine and planned reuse means the Starship isn't even remotely close to the BDB concept.

As for the economics I somewhat agree, if it costs more than a Falcon 9 for 5 tons GTO it's not going to sell many rides. If it's cheaper then who cares if it's running at 20% payload capacity.

When it comes to manned I can't see it getting NASA rated without an escape system, the shuttle didn't have one and looks at it's kill count. They won't do that again for good reason.

>> No.12447877

>>12447828
>>12447826
Yeah because it's closer to equator and so you use less fuel to get into geostationary orbit or something like that. But the one in germany, i don't think it will launch from french guyana like ariane or vega

>> No.12447907

>>12447554
who are you quoting?

>> No.12447915

[00:00:00] Liftoff!!
[00:08:21] Raptor Liquid Fuel Engine shut down due to vapor in feed line
[00:08:28] Raptor Liquid Fuel Engine collided into the surface
[00:08:28] Structural Girder collided into the surface
[00:08:28] Raptor Liquid Fuel Engine collided into the surface
[00:08:28] Raptor Liquid Fuel Engine collided into the surface
[00:08:28] Starship SN8 Liquid Fuel Tank exploded due to overheating: 2121K / 1200 K
[00:08:28] Starship SN8 Liquid Oxygen Tank exploded due to overheating: 2200 K / 1200 K
[00:08:32] Starship SN8 Nose Cone collided into the surface
[00:08:41] Avionics Package collided into Container

>> No.12447918

>>12447554
Just the cope was a quote, but since you either already understood that (and therefore are trolling which is against global rules) or you're actually retarded enough to not understand my point I see no reason to continue this conversation.

>> No.12447922

>>12447877

Pretty sure I saw some news article mention that the first prototype will launch from French Guyana
I mean, can you imagine the kind of regulations Germany would throw at you when building a spaceport?

>> No.12447932

>>12447918
>which is against global rules)
Why are you here? Not him, just an oldfag that doesn't understand rulefags at the best of times and even moreso when they are bitching about trolling on a fucking imagebaord.

>> No.12447933

>>12447915
Based KSP crash report poster

>> No.12447935

>>12447932
cuz tranny janies keep banning me for breaking global rule 3

>> No.12447937
File: 2.00 MB, 191x320, B0B1ECDD-7B91-46A4-B723-B0E9DC5EA739.gif [View same] [iqdb] [saucenao] [google]
12447937

So when can we expect the sn9 flight? Early January?

>> No.12447940

>>12447866
>When it comes to manned I can't see it getting NASA rated without an escape system, the shuttle didn't have one and looks at it's kill count. They won't do that again for good reason.
I don't think Starship and the Shuttle are remotely comparable.
The Shuttle was full of really dicey elements and was extremely complicated to operate. Starship doesn't have to deal with shit like crazy-fragile, non-standardised heat tiles, an aluminium structure, SRBs, ice chunks from the fuel tank slamming into things, etc.
The landing manoeuvre is new and crazy looking, sure, even this first attempt with a ghetto-ass prototype with underpowered RCS thrusters was far smoother than I think any of us expected, aside from the whole "running out of fuel" thing.

Ultimately, all that matters is how often they can land these fuckers once completed. If they fly it so damn often that they can work out enough kinks, then they could human-rate it through sheer reliability.

>> No.12447947

>>12447937
I heard within the month but can't remember the source on that.

>>12447940
Maybe one day but I don't see NASA signing off any time soon. Still the FAA might and SpaceX could be flying SpaceX crews / customers before NASA sign off.

>> No.12447953

>>12447530
Why is Gen X so pathetic? Worse than both Boomers and Millennial, more forgettable than Zoomers.

>> No.12447964
File: 1.66 MB, 3840x2560, 90DD7197-54D7-45D0-9CAF-1B88F85815D2.jpg [View same] [iqdb] [saucenao] [google]
12447964

>>12447947
NASA might be okay with starship flying their astronauts to moon/iss/gateway, but use capsules for reentry (until starship has a couple of dozen reentries under its belt).

>> No.12447965

>>12447448
>>12447474
>nah bro, I just thought about it for a minute and decided it's not possible. No way they could be significantly more efficient than a bloated and politicized, bureaucratic nightmare like NASA

>> No.12447971

>>12447474
They don't because NASA doesn't allow them to.

They'll fly their own astronauts that will sign papers absolving SpaceX if Starhip crashes. Mark my words.

>> No.12447972

free enterprise at work baybeeee

>> No.12447977

>>12447530
He leaps to conclusions fast, within his wheelhouse this works and he's usually right, outside his wheelhouse he makes a fool of himself.
He's 100% right about Hyperloop, Musk sold it for a reason. When it comes to rocketry you can see how little he knows in him most recent video. He thinks the nozzle is melting and doesn't realize that would cause burnthough so fast you would see it in the footage. He doesn't know the injector plate is copper (like just about every rocket engine) for thermal conductivity.

>> No.12447985

>>12447972
Explain how SpaceX is different to Boeing.
Both are private businesses, both get government funding, both get the majority of their launches from government contracts.

The difference isn't "muh free market" it's that the guy running the show isn't motivated by money, he's motivated by progress.

>> No.12447989

>>12447985
>The difference isn't "muh free market" it's that the guy running the show isn't motivated by money, he's motivated by progress.
you are adorable

>> No.12447994

>>12447989
If you want to see what a guy motivated by money alown does look for Blue Origin, he buys congressmen and gets government contracts with vaporwear.

>> No.12448001

>>12447989
there's no money in colonizing another planet

>> No.12448008

>>12447985
Space Solar Power. The Mars stuff is a sham, Musks after that sweet Solar Power

>> No.12448013

>>12447994
>claims he'll put the first woman on the moon
at this rate the chinese are going to do it before he even gets to leo

>> No.12448046

>>12447953
They're the ironic generation. The generation of New Athiesm, smug late night show hosts and Daria.
They think that having a belief in a cause or a will to change the world for the better is gay, and they want to tear down anyone ambitious or exceptional. This is why the moment they started to control institutions, they began waging war on all things beautiful and heroic, as they're exceptional qualities. They'd rather be mediocre and smugly watch the world fall apart than try changing it for the better.
Thunderf00t hates Musk because he's a GenXer who breaks that mould completely.

The other generations aren't that way (at least to the same extent). They're willing to believe in shit, albeit often dumb shit.

>> No.12448194

>>12444271
fucking coomers man

>> No.12448210

>>12447866
>looks at it's kill count
For Challenger, it's likely some, if not all, crew members were alive, and possibly conscious, until the crew compartment hit the ocean, intact, and experienced a terminal velocity impact. It's plausible if the crew compartment had a useable framechute, at least some of the flight members could have survived. Also I believe early iterations of the shuttle had ejection seats for the commander and pilot, although their use envelopes made them almost pointless, but everyone refused to have them enabled with other people on board so they were removed.

>> No.12448215

>>12447555
As bad as you may think living on this planet may be, just imagine how much worse it would be on a dead barren planet sharing it with self-proclaimed Martian emperor Elon fucking Musk and his zoy guzzling lackeys.

>> No.12448219

>>12448210
By that logic the 737 Max hasn't killed anyone because it was the ground.

>> No.12448233

>>12444080
The front end fell off.

>> No.12448236

>>12445803
You're correct, I completely forgot that they dropped hypergolic ignition.

>> No.12448254

>>12447530
>Impyling Musk is exceptional or heroic
Kek. He's a coward that would rather run from problems here on Earth than help try to solve them. Just like he ran from South Africa. Like when it turned out his little submarine wouldn't work he turncoated to call that guy who actually help save the kids a pedo lol. Or when he promised to help Puerto Rico after the cyclone but abandoned them after it turned out his little solar panels weren't doing shit to help restore the infrastructure.

>> No.12448261

>>12448219
No, it definitely counts for the shuttle. My point is just that the shuttle could have been slightly modified to help crew survival, with a decent chance of success, in the case of booster explosion, without an elaborate abort system. If you want to shift blame away from the shuttle, the real culprit is management, and to a lesser extent PowerPoint, and to an even lesser extent autistic engineers. Internally people had noticed anomalous behavior of the SRBs in cold temperatures, and some people were begging high level managers to scrub Challenger's launch because it had actually been freezing (in Florida) the night before which was way outside of the envelope some engineers had established for the SRBs. They were told to shut up because there was so much publicity with that teacher chick. Oops. With Columbia the problem was known early in flight, and an emergency EVA was contemplated to assess the damage and determine how to return the crew. But in the PowerPoint presentation shown to decision makers made by engineers about what the damage could be based on what they did know, the key fact that their testing showed even small debris might have caused extreme damage resulting in a high risk of total loss was put as a sub-bullet point in a long list of other facts of much less importance in a lengthy presentation. The decision makers didn't notice it, weren't explicitly made aware of it, and decided not to do the EVA to figure out if reentry was safe, but to roll the dice.

>> No.12448317

>>12448261
Yeah they could have gone with a F-111 style ejection system. They could do the same with a manned Starship.

>> No.12448362

>>12448254
>run from problems here on Earth than help try to solve them
So him making Tesla electric cars to be environmentally friendly isn't helping?
>Just like he ran from South Africa
He left to come to the USA so he could start up companies. South Africa was like "fuck off"
>Puerto Rico
The retards kept stealing the panels and batteries and he got tired of replacing them. No one would guard them and the commoners would rip that shit out when no one was looking.

Elon tries to help, but ultimately wants to get off this gay shitty earth, thats his end-game. I don't blame him either, having to be on the same rock with twats like you.

>> No.12448379
File: 48 KB, 480x508, 0c0.jpg [View same] [iqdb] [saucenao] [google]
12448379

>>12448215
yeah, pretty bad

>> No.12448380

>>12448362
>So him making Tesla electric cars to be environmentally friendly isn't helping?
he doesn't complain about wh*te privilege so that doesn't count obviously.

>> No.12448397

>>12448380
Haha, fair enough

>> No.12448409

>>12448362
>He left to come to the USA so he could start up companies. South Africa was like "fuck off"
He fled Apartheid South Africa at age 17 to escape mandatory military conscription when he turned 18.

>> No.12448458

>>12446826
Redirection of exhaust to pressurize the header tanks during the landing burn

>> No.12448499

>>12448409
>>Bullied pretty severely growing up

I don’t blame him for wanting to get away.

>> No.12448538

>>12448261
Side mounted vehicle with frail heatshield is fundamentally broken design. There was nothing they could do. It couldn't even fly autonomously because the landing gear deployment required a human on board. Surprisingly, absolutely nothing else did.

>> No.12448564

>>12448538
>the landing gear deployment required a human on board
Top kek, all that complex automation and remote control and the job that can be done with 1 solenoid is left manual only.

>> No.12448708

>>12448254
GenXer detected

>> No.12448718

>>12444037
that is one of the most satisfying fireballs i've ever seen. right when it explodes is pure kino

>> No.12448825

>>12447940
>Ultimately, all that matters is how often they can land these fuckers once completed. If they fly it so damn often that they can work out enough kinks, then they could human-rate it through sheer reliability.
Lol this is cope, how many times had falcon 9 flown before nasa had them install an escape system? Nasa won't allow it, they have to have a abort somehow.

>> No.12448830

>>12444037
Nothing at all. That's an awesome scene from the next Michael Bay film.

>> No.12449282

>>12448564
They argued it will be too dangerous for autonomous system because it might deploy it accidentally.

The real reason was they wanted astronauts on board every flight for continued employment so government officials don't just say "well since rockets don't need people we don't need to fund the academy..."

>> No.12449497

>>12447522
we don't give him any money

>> No.12449583

>>12448458
right, that + landing

>> No.12450774

>>12447141
some chemicals
bigger ships
the thing is that we don't even know the possibilities yet
i mean, i don't know
i'm pretty sure there are some smart people thinking about this

>> No.12451758

>>12448254
>he promised to help Puerto Rico after the cyclone but abandoned them
He probably found out that Puerto Rico is full of Puerto Ricans

>> No.12451769

>>12447799
>>12447769
>>12447763
>design your rocket to operate not only at 1 atm and at 0 atm, but also at much higher pressure and underwater
adding those design constraints would surely reduce cost and complexity

>> No.12451784

>>12444037
I believe the exact scientific terminology for what happened is
"It went boom"

>> No.12451801

>>12444037
What is evolutionary advantage for something like this happening?

>> No.12451810

>>12451801
expansion to multiple planets as contingency in case of disaster on the first

>> No.12451955

>>12447448
>pfft, a self drawn carriage...too unsafe and inefficient, theres no way it could improve at all

>> No.12452858

>>12444426
>>12445865
>Metallica
>megadeath
>metal... yuck

>> No.12452978

>>12446943
You send more flights so yes, it will be safe for most of them

>> No.12453025

>>12447985
Boing is not private. It is a publicly traded company, meaning it has a million blood sucking leaches preventing them from prioritizing building things over getting cost-plus contracts

>> No.12454367

They are probably going to do a crap load of test flights before humans ever get on that giant shiny dildo. Anyone saying SpaceX is finished because of this needs to go back to window licking and playing with sticks.

>> No.12454560

>>12444037
Now imagine this happening in orbit when two of them attempt ass2ass

>> No.12455160

>>12447738
Do you think the environmentalist would ever allow this to launch? lol

>> No.12456702

>>12445794

that green in the flame was vaporizing copper, raptors do not use TT for reiginition. engine did not get enough methane and to much oxygen and turned effectively into a blowtorch melting itself

>> No.12456717

>>12447675
i think the leg thing was intentional, since even a hard landing keeping the whole thing intact would have rendered it non recoverable, with that explosion elon was saving a shit ton of money for angle grinder disks, plasma cutting time and workforce to dismantle that thing at the pad, picking up the debris and repairing some damage is way faster than chopping up an entire rocket.