/sci/ - Science & Math

t-3:30
11:10 PST new target

>>10309910
T-4m and counting (5 min delay)

what's it carrying?

>inb4 scrub

>>10309927
LIFTOFF!

NROL-71, spysat

>that toxic column of exhaust gas

>>10309937
isn't it all LH2/LOX?

Did they start adding flight cams? I remember watching other launches and it was always incredibly garbage cgi.

very nice rocket cam this time. rare

kek bowtie guy looks silly

Is the webcaster an intern?

>>10309941
>>10309940
they must have changed their dumb policy
before it was always the excuse of
>our flight plan is too supersekrit we can't show past 1st stage

Whatever happened to the starship threads?

>>10309951
Interesting stuff stopped happening, so there's no need for threads for now.

I liked the booster separations it look real cool. Why didn't they show the landings though?

>>10309950
same policy: they cut the webcast at payload fairing jettison. All the rocketcams are pointed away from the payload, so they aren't a security concern. More likely, they are bowing from pressure from SpaceX and others who are treating live launch footage as free publicity.

>>10309954
//old space//

>>10309956
>ULA
>landings

ULA put the second E in EELV.

>>10309956
this guy doesn't land anything, you're thinking of the falcon heavy

>>10309951
Most the work is currently internal e.g. fuel tanks, or at the pad which is harder to view due to it's elevated and fenced off nature. Basically we need drones to get any meaningful pictures now.

>>10309963
>>10309964
>imagine taking this bait

I wish water reactions glowed brighter, no visible engine flame, but visible contrail

>>10309978
nice shot, anon!

>>10309966
that's a bummer and also, checked.

Say anything you want about SMART reuse it would have been a real sight to see and more interesting than any rocket launch or landing bar manned flyback boosters.
>the moments of anticipation as the target is finally within reach of the agile maneuvering chopper controlled by top USAF pilots
>the drama of the chopper crew struggling to regain control of their craft after it was nicked by the approaching engine bay and its chutes
>the dramatic chatter as the battle with crippled craft progresses as it descends into full uncontrolled spin

>>10309978
You need a Sea Dragon.

Another look at the Sea Dragon.

>>10310159
>lifting an entire half of a space station in one go

>>10310159
Isn't the sea dragon dirt cheap? The only thing hindering it is no demand?

>>10310730
the only thing hindering it is flow separation of the fuckhueg nozzle tearing it to pieces

>>10309910
spacex doesn't use a service tower right?

>>10311056
SpaceX have a service tower on all of their stuff, but they erect it at the launch site like the Soviets did
the service tower is for the cryogenic liquids and now for the astronauts

>>10311056
>>10311074
That was misleading
I meant to say that spacex have a service tower on the pad, and they build their rockets horizontally, then lift them vertical once they're on the pad. The service tower is for cryogenic liquid, electrical, and data connections. After DM-1 they will have a connection for people at Kennedy.

>go to register at NSF
>reading their TOS and such
>get to the Verification
>encounter this
what a good typo

>>10310221
the original ITS had 500T payload
the current BFR should still have >200T payload, just when reusing it goes down to 100

>>10309963

>>10311074
What cryogenic liquids are you talking about?

>>10311909
lol, no, it absoluetely wont

>>10313207
Lox and rp1
RP1 doesn't need to be chilled but I believe they do chill it

>>10309910
Wasn't Jeff Bezos' company "Blue Origin" supposed to launch a commercial rocket full of NASA space experiments today?

>>10314890
Blue Origin doesn't have any rocket, that can send things to orbit.

>>10314890
When have they even tested an orbital capable rocket? All they've got right now is an amusement ride.

>>10314890
Jeff who?

>>10315517
>>10315519
The New Shepard actually does carry some low-level NASA experiments from time to time, mainly small zero-g experiments which are built by interns and students.

>>10309937
>a mixture of water vapor and unburned hydrogen
>toxic

You're thinking of solid rockets and hypergolic liquid rockets.

>>10310741
this
>>10310730
Sea Dragon would have been ~$300 million per launch, however it would've got ~500 tons to LEO. The economics would only work if you were using it to launch bulk cargo that was insensitive to the extreme vibrations of launch on that massive rocket. It was designed in an era when we figured we'd be building half kilometer across ring space stations out of aluminum sheet metal launched from Earth. Per kg it would have been significantly more expensive than BFR will be.

>>10313207
They used densified LOx at around -215 C, and chilled kerosene at around -7 degrees C (they'd go colder with the kerosene but it starts to gel up)
A big advantage of methane is that if you densify it by chilling it close to its freezing point it nearly equals the density of kerosene yet doesn't thicken and also gives higher Isp. That's one reason why they chose methane as the fuel for Raptor.

>>10316630
it's also easier to make and purify
the only disadvantage is that it requires a lot of hardware to contain, compared to RP-1 which is fine just sitting around in whatever container you can find for it