/sci/ - Science & Math

Homosexuality WILL be banned on mars
Women WILL be banned on mars
Only sex wiith robots will be allowed

>>14716356
FTS Archive
https://drive.google.com/drive/folders/1KCJBL632oieD1r6JOh_5Eg9NTcf_-hH8?usp=sharing

>>14716363
gay

This picture has such an aesthetic quality

one of the best space pics ever taken

>>14716373
>>14716379
get rid of your name
first picture is cool except for the ugly russian thing in it
whilst the shittle is kino it sucks

Which one will go up first?

>>14716381
Why did you tell him

>>14716356
/stg/ is better

>>14716408
/sfg/ has had the same thread up for a month

>>14716381
>SHITtle
Kek, the /pol/tard subhuman btfo himself

>>14716421
What are you on about you gibbering cretin?

>>14716421
New around these parts, anon?

>>14716370
Only if the sexbot identifies as male.

Wait wait wait, you're telling me NASA just throws away the whole rocket?!

>>14716485
sometimes they throw away the astronauts as well

>>14716363
take a shower

Will it blow up on the pad?

If we aren't talking about retrieving (50+ unique variety samples from mars), beggining building on Mars, with drones, rovers, robots, ai and/or Man, Or large scale space stations, or moon/asteroid/planet mining; we aren't really talking about much are we

how loud will a full stack be? Will it be too loud especially since It’s not on the main LC-39 pad, they can’t dampen the sound with water

>>14716563
Nvm I found it, 90-140 decibels for the orbital launch, which seems kinda low considering the water dampened Saturn V was twice as loud

>>14716572
Link if anyone’s interested

https://www.faa.gov/space/stakeholder_engagement/spacex_starship/media/Appendix_B_Noise_Assessment.pdf

>tfw /sfg/ didn't tell me anything about the chinese Vega launch the past Wednesday
Lijian 1, a.k.a. Zhongke-1A. It is an all-solid 4 stager. It even looks similar.

Boeing’s HLS bid is locked behind a paywall but the figures are still available

>>14716592
Looks like it required 2 SLS launches, just as NASA worried

>>14716553
Yes, as karmic balance for JWST going perfectly.

>>14716585
cont.
This is the most powerful chinese solid rocket so far. 1.95 tons to LEO. It will be also the cheapest at $10k/kg

>>14716594
>>14716592
The ascent stage reuses a Starliner pressure vessel. Kind of neat.

>>14716592
>>14716594
>>14716603
Last one. The descent stage actually features a tiny habitat inside itself along with an airlock. The ascent stage is reusable and docks to a brand new descent stage on every mission. It looks like the crew EVA from the descent stage and use it as a small hab during their stay.
Not gonna lie, it’s not a bad proposal as far as OldSpace goes. The two-SLS part is awful though
https://www.semanticscholar.org/paper/A-crewed-lunar-lander-concept-utilizing-the-SLS%2C-Duggan-Engle/511ee390cb9660c90cc1affb55d319405c61ba22

>>14716564
What about redirecting asteroids towards Earth?

>>14716599
cont.
CAS Space (Chinese Academy of Science) will also develop two more solids: ZK-1B and ZK-2, and two partially reusable liquid rockets: ZK-3 and ZK-4 (yes, they are also ripoffs)

>>14716572
Possible because MethalOx burns considerably cleaner than RP-1? They're both controlled explosions, but the by-product of RP-1 and Oxygen is carbonized material/soot, and the interaction of that with the atmosphere at the large scale of a super heavy rocket means there's more propagation of the sound? Plus, the Saturn V had only 5 engines, though unbelievably massive ones. The Raptor2s, by comparison, are tiny. There's also several rings of them, and that likely compresses the sound as alternate rings of engines would create interference patterns, cancelling them out. It's only after the rocket has sufficiently cleared the tower and is overhead that you'd maybe get most of the sound?

>>14716603
>>14716612
I see that we still haven't evolved past designing death traps where any one thing going wrong will kill the crew in incredibly violent and compressive ways.

>>14716572
>>14716575
Imagined all the deafened ocelots...

>>14716621
cont.
And also the touristic ZK-6 (looks like a Crew Dragon on top of a New Shepard-ish launcher)

>>14716592
It's not behind a paywall if you use sci hub

>>14716627
It's only until we are able to build a space elevator in a couple thousand years. It's not like we don't have plenty of spare humans around.

>>14716627
Having the engines attached that way instead of radially also means that if a single engine fails, the other 3 won't be able to lift the craft, since they wont be pointing at the CoM.
I hope they are hypergolic engines, otherwise it is a russian roulette.

>>14716635
>>14716640

I really did just mean it more from the fact that, if you exclude SpaceX, majority of designs are basically:
>let's build space for people to live in
>then lets surround that by fuel tanks and engines
>so that when something fails
>everyone will violently die
Instead of:
>let's build the engine and fuel module
>let's put the space people will live on top of that
>in the event that something fails, there's still a chance the crew could live

>>14716632
cont.
Forgot pic.
Man, these chinks really do copy everything.

Cairns Spaceport when?
It's less than 17 degrees off the equator, has rail and road connections to the rest of the country, along with a seaport and an airport. Is located on the eastern coast of the country so there's open ocean for eastward launches. Why hasn't Australia gotten into the space race?

>>14716643
Survivors file lawsuits and go on talk shows. Who wants that?

Also here’s something weird. NASA has started putting Starship into their manned Mars plans. However….it’s just used for cargo launches to LEO lol.
>http://fiso.spiritastro.net/telecon/Kokan_2-2-22/

>>14716599
So when are they fielding an ICBM or FOBS on the basis of that rocket?

>>14716657
Supply chains probably

>>14716632
>>14716646
It's not that surprising though. SpaceX continues to prove success, while everyone that keeps designing the old way, lags further behind. The other thing is that by copying SpaceX, its forcing China to evolve their own design and material science programs to keep up with what SpaceX is doing. It's also forcing their engineers to think along similar lines aka outside of the fucking box called: [ design a system that can maximize grift and minimize cost ]. In the next 20 years, the biggest threat to Tesla for EVs is China, not any other car company out of US or EU. That says a lot. Similarly, the biggest threat to SpaceX in the next 20 years, is once again China which is copying SpaceX, and maybe Relativity, since all their leadership is ex-SpaceX. But all other players like Boeing, Northrop, LM, Arianne, they're not even credible threats--because all of them still think its 1975 and they have another 100 years to get to 2020 design cadence.
>>14716661
Reputation is lost more if everyone dies vs if only some people die.

>>14716646
Probably far easier to attract investors for something that has already been demonstrated to work elsewhere

TIL that Roskosmos publishes a free magazine, "Ruskie Kosmos".
>https://www.roscosmos.ru/38017/

In the April number they showed some nice ROSS renders. Supposedly these modules will be launched by Angara A5Ms and seviced by Oryol ships.

But realistically, they won't launch shit, let alone for 2030. They took 30 years to launch Nauka LOL.

>>14716657
>Why hasn't Australia gotten into the space race?
Lack of interest by the government in pushing things over the finish line.

There's been "interest" in an Australian spaceport for decades. The Soviets tried to do an end-run around western satellite export restrictions by proposing a Proton launch site a bit further up the coast at Cape York back in the early 80s, which turned into a Zenit pad just before the wall came down. Japan was also interested in launching from Australia, since that would have given the H-II a bit more an edge against the Ariane 5.

There were a few private groups interested in running a commercial spaceport (which was important since the government wasn't interested in doing that) but they couldn't decide on which design was best to pursue and Canberra didn't force them to pick a lane, so the whole thing dwindled away into nothing by the mid 90s.

There's also the problem that it's hard to find a spot that'll do both equatorial and polar launches. The general assessment was that unless you're willing to dump spend stages in the outback like the Russian and Chinese, you'd need to pair an east coast site with a polar site at somewhere like Woomera.

Reddit insider says Starship+Superheavy costs $45 million to build

>>14716389
axiom of course

>>14716745
Anon my uncle owns a bridge in Kansas, do you know how much they go for?

>>14716745
Reditors are somesmart cookies. if i could i would give you reddit gold kind stranger

>axiom is stealing modules from the iss
>the russians might steal modules from the iss for their upcoming but unlikely space station
why dont other groups steal modules from the iss too/

>>14716745
that's not an insider, just a regular poster who worked on shuttles

>>14716688
The only real problems with it are financial and logistic. They're not going to be able to pay for it quickly (or at all) because most of budget will get embezzled. Even if they did sit down an clean out all of the corruption they'd still have a hard time putting it together because most of the electronics are imported from nations that are sanctioning them.

If they can get around those problems, then it's perfectly feasible. The Angara can build it and you can even service it with Soyuz/Progress until the Orel drags itself across the finish line.

>>14716745
Lmao what do you mean insider, those are just ballparked numbers and some addition that anyone could have done

>>14716754
ISS fire sale, every module must go!

How come /sfg/ is a containment thread only for people who wish to mainly discuss actual ongoing or proposed contemporary space flight, how come the rest of the board has to see all of the stupid "muh FTL comic book fantasy" garbage posted as thread to the main board?
How does /sfg/ manage to keep the FTL crowd at bay?
Can we apply those principles to the board as a whole and evict FTL from /sci/?

>>14716745
It'll be a bit more than that. Steel + engines + man-hours isn't a bad start, but you need to at least try and figure out how much the tiles cost and then make some ballpark estimation for electronics.

>>14716745
My dad works at SpaceX and he says you're a tranny

>>14716623
>MethalOx
wut
You know that the L is part of "LOX", right?
There is no L in "methane".

>>14716553
No, it's going to get high and fast far over the ocean before it explodes, that way they can ask for an extra billion to look for pieces.

I'm ugly and barren, yet people have admired me for eons.
I had many visitors, but they no longer come anymore.
When you go afar, you can't talk anymore.
Who am I?

>>14716745
>BFR is the Sea Dragon of our time
I beleeb it

>>14716764
/sfg/ is all crossboarders, we have no control over what the rest of the /sci/zos do, and even avoid the catalog except to find the latest /sfg/ thread

>>14716643
>we need fuel
>we need radiation shielding
>use fuel as radiation shielding
>shielding for no added mass
Also if your fuel tank explodes you are dead either way, one is near instant and the other is when your oxygen / food / heating run out.
Did I really need to explain this?

>>14716795
/sci/sfg
>2 posts
>which one?
>oh no early bake
>nvm I'm gonna chose the one with more replies
>post detailed post about why the faustian spirit is responsible for the downfall of spaceflight and this cannot be reversed unless we have a cultural revolutoin
>this post has been archived

>>14716764
You're derailing the thread. Meta isn't our concern. Please leave now and post no more about meta problems of /sci/.

Hullo anons I'm working on a /sfg/ crossword

>>14716712
Interesting history. How important is it to be able to do polar launches? My impression is that they're a very small single digit percentage of all launches but truly don't know.

>>14716806
/sci/tzo discarded

>>14716810
>t. trigger'd FTL thread poster

>>14716843
>muh israel

>>14716843
Interesting trinket, but the underlying meaning opposes the soundbyte. To be fair, you have to have a very high IQ to understand. The humour is extremely subtle. If you boil away the science, if you face science, permit it to pass over you and through you, =and when it has gone past you will turn the inner eye to see its path. Where the science has gone there will be nothing. Only reality will remain.

>>14716837
Here you go anons! I present the first /sfg/ crossword!
https://crosswordlabs.com/view/sfg-crossword-1
>https://crosswordlabs.com/view/sfg-crossword-1
https://crosswordlabs.com/view/sfg-crossword-1
>https://crosswordlabs.com/view/sfg-crossword-1

>>14716363
Women will be transplanted into robots.
>>14716389
Probably Axiom, but I'm rooting for SNC. Such a simple design that easily doubles as a mini-Constellation ship.

>>14716894
>i'm a tranny with a stupid comic book fantasy life, i jack off to children's cartoons like a pedo too

>>14716838
Polar was less commercially important back when all communication satellites were launching to geostationary orbit and polar orbits were mostly used by military spy satellites. With satellite weights and launch costs both going down there's a growing market for commercial earth observation data and a lot of the prospective mega-constellations are launching to high inclination orbits that aren't polar but aren't that far off either.

If a launch site can't do high inclinations it won't be the end of the world, but 31 of the 144 launches in 2021 were to polar or sun-synchronous, so you'd be leaving a lot of money on the table. The commercial spaceport under construction at SaxaVord in the Shetland islands is only going to be able to launch to polar/SSO given its location, and they think they'll have more than enough businesses to make the project worth the investment.

>>14716890
I only got 2, 8 & 14 across, guess I don't pay enough attention to shitposting.
Also Big Jim seems to be missing.

>>14716930
sorry anon maybe i made it too difficult

>>14716623
i thought the sound wave was more created by the energy of combustion than the size of the exhaust particles hitting the pad. arranging the rings to cancel out the sound waves would make sense, though. but i don't really understand any of this, we just hit sound waves this week in my physics class.

>>14716940
All good, I got 13 down now but I think that's all I'll get.

>>14716745
>>14716768
you also need the capital cost for all the equipment used in manufacturing. it's not a bad attempt at ballparking a minimum cost figure but the true amount has to be higher.

Not /sfg/ related but why is the board /Sci/ so bad?

>>14716968
>Not /sfg/ related
then don't post it in /sfg/

>>14716389
whenever i look at the northrop grumman station my first thought is 'what idiot concept artist put gateway in LEO?'

>>14716978
Tbh the original plan for gateway was for it to just be cygnuses (Cygnus?)’

>>14716890
8, 14, and 15 across
1 down

no idea about the others

>>14716990
Cygni

>>14716930
>>14717014
I added a few more words to each description, lemme know if its still hard

>>14716356
damn that kid is still inside that balloon huh

Has this been posted before today?
I mentioned this in last thread too, but I think I found musk's personal account.
But if this image existed before then it's a larp.

Test

>>14716381
>>14716373

>>14716922
I posted transformers, not anime.
>>14717100
Beautiful.

>>14717093
Go back newfag

FUCK Elon Musk

>>14716640
If the engines are capable of producing enough thrust you could fly on two in opposite corners. Provided of course that the two engines can produce enough thrust to make the ascent. All depends on your design margins.

Last thread we were talking about a third Commercial Crew certification. While DreamChaser is an obvious vehicle, what rocket could it use to actually make it a third fail safe? Same with Cygnus, they are going to have to reach to get rockets.

Is there some algorithm issue? Nobody is responding to my posts.

>>14717093
Weird that Google image search only returns one result.
>Adult Immunization Schedule by Vaccine and Age Group | CDC

>>14717117
As if he needs any more children.

https://youtu.be/0fZ-r5Qe3tM?t=1982
illegal buran footage

>>14717141
Considering his trip to Syria, I wouldn't be surprised if this wasn't prearranged too.

>>14717138
Can't colonize mars without children

>>14717093
from EDA tour retard
>>14717136
>actually using reverse image search as reference
they all suck major ass since everyone is scared of kiddy porn

>>14717148
Timestamp? I don't think he was wearing glasses in the eday tour

>>14717133
Cygnus will end up launching on Vulcan eventually, but there's an interim where they might have a launch or two on Falcon 9. NASA wouldn't be the happiest from a redundancy POV, but Falcon is reliable enough that they'd let it slide.

Vulcan will launch Dream Chaser, crewed or otherwise. There's really nothing else in the right weight class that could lift it. The Ariane 6 could lift it, but that'd be limited to European institutional missions. Terran R could have a custom designed 2nd stage printed for lifting Dream Chaser, but Terran R is just to hypothetical at this point.

Thank you Korolev

>>14716745
naive estimate. It's very obvious this is one of the stans Elon deluded

>>14717182
for dying early

>>14716745
Bros I did the same breakdown for SLS and it came out at $70M

Why is man rating a rocket so hard? Just put a capsule on top of something that doesn’t blow up every launch. Delta IV’s fireball is also overrated; if the crew is in a capsule on top they’re safe.
I know NASA doesn’t want Challenger 2.0 but Jesus guys, cmon

>>14717100
straight to my collection

The only way the USSR’s space program could’ve survived is if either Korolev or Chelomei died super early. Because the two of them competing with each other halved the already broke and sparse resources of the USSR’s space program

>>14717205
Back when they got shit done they would put men on top of an ICBM and called it a day, now they are so scared of killing people that will never happen again.

>>14717212
Chelomei should have been left of weapons instead of having any say over manned craft, history shows Korolev made shit work while Chelomei tried to fund pet projects.

>>14717215
>now they are so scared of killing people
this is all the consequence of (wo)man-rating a rocket that should have never (wo)man-rated

>>14717215
Yeah. But like cmon Atlas, Ariane, and Delta have hundreds of launches between them which were successful. Why can’t NASA just put an adapter on Starliner or Orion and say “yeah we’re flying on this lol.”
>It’s not that easy in rocketry
Yes it is pussy

>>14717220
Both Atlas and Ariane are man-rated, though.

>>14717212
Neither of them had family members in the politburo, thats why they couldn't get the money they wanted. Anton Mikoyan's brother was Anastas Mikoyan, who was one of the top ranking underlings of Stalin, thats how MiG became an aviation powerhouse.
MiG's planes were always second rate until they were able to acquire talent from less well connected organizations, which they achieved by running their competitors out of business via political connections. Anastas' son Stephan covers the history in detail in his autobiography. Stephan was a MiG test pilot, I read his book because I wanted to learn technical details about MiG which might not exist in other sources, but the book is all about politics.

>>14717232
reminds me of my domestic politics. It really seems like Americans have less issues with nepotism

>>14717215
>now they are so scared of killing people that will never happen again
Yet SLS exists lmao

>>14717235
The US has nepotism everywhere it can be hidden but congress isn't all going to agree that Jims bother-in-law should get the contract. It's the difference between one person and a group of people having to make decisions.

>>14717238
SLS and Dreamliner will never kill anyone, you have to fly for that.

when are we going to start getting good pics of this thing

>>14717242
>>14717232
I will never understand why the communist state USSR had more issues with a lack of political unity than the capitalist USA

>>14717134
Fuck off, nobody is responding because your posts are all trash

>>14717235
Americans will tolerate a lot of corruption as long as they get some form of entertainment out of it. Look at the funding for just about any pro sports stadium in the country. The process is always incredibly corrupt and screws over the taxpayers but they're ok with it because they get a shiny new stadium they can brag about to the people in another city who did the same thing five years ago but now don't have the newest civic toy.
For the IFLS! crowd, as long as there's tons of renders and plans that they can gush over, actually getting anything real accomplished is of little consequence. All that spending is worth it for them to get some new Science! porn to consume.

>>14717248
Once they build it out enough to be bigger than ISS (or when ISS goes away).

What is the most IFLS!! rocket?

>>14717253
The USSR was unironically more diverse than the United States of that era. Though officially there was only one party, the Communist Party, there was lots of tribalism.

>>14717274
>>14717281
Are you talking about IFLScience? I have never heard ot it.

update

>>14717248
They'll launch a micro drone that does maintenance and show video of it. Or via their capsule.

>>14717134
i get multiple replies on almost everything i post

>>14717274
>>14717281
>>14717287
Disregaurd, I'm retarded. After posting that my brain turned back on.

>>14717287
“IFLS” stands for “I fucking love science!” And it basically means people who only enjoy science because of articles on science tabloids.
Think people who read articles on JWST but are anti SpaceX or colonization because “it’s bad” or something

>>14717281
Don't know about rocket but the most IFLS! ship is the VSS Unity, which is sort of a rocket but not really.

>>14717235
>It really seems like Americans have less issues with nepotism
better authority over the public information allows them to cover it better.

>>14717303
The whole Bush Jr and Bush Sr thing is pretty shady. I’m just surprised people voted for Dubya after his father dropped the ball in ‘92

>>14717267
???
>>14717295
I see. I guess there is no way to sugarcoat this.

>>14717315
What I found funny with Jr is the media was having a great time shitting on him until 9/11 then overnight they started pretending he was hyper competent. Not sure if it was political pressure or just the owners deciding now wasn't the time to do anything "unpatriotic" but the shift was clear and instant.

You now remember SN5

When are the next James Webb images expected?

>>14717242
SLS will just have to find a way to kill people on the ground.

>>14717331
No idea mate. They have some TRAPpist data posted but it’s just the star

>>14717315
>after his father dropped the ball in ‘92
what ball did his father drop

>>14717353
A recession and losing the election

>>14717338
they look at the planets by looking at the star

DART impact in 2 months holy shit

>>14717333
>20x the Nedelin catastrophe

>>14717338
Yes I heard of that. I'm looking forward to seeing things that have not been imaged before. The first batch were very interesting, and I understand they were showcasing the improvement over Hubbel by looking at previously seen areas. It will be interesting what new discoveries are in store. Probably my favorite mission sense new horizons. It was amazing seeing Pluto getting clearer and clearer. The final flyby was beautiful. I hope to get feelings such as that when more images are shared.

>>14717369
Imagine if they filled the core stage with hydrazine

>>14717330
disgusting phonefag

>>14717353
tax hike, pushing free trade with communist china, highest gas prices evar - even factoring for inflation and spending more than a fortune on israel https://i.4cdn.org/sci/1659285275831460.jpg

>>14717353
As a dumb europoor the meme we were thought is that his election campaign ran on the slogan "read my lips, no more taxes!" but then once he was elected he raised taxes which pissed people off. But again, this is dumb europoor education about a fairly niche part of American history so it's probably not very accurate

>>14717385

>>14717353
Bush 1 gave some pushback on Israeli settlements in the West Bank so ....

Our moon dominates the sky of its planet like no other moon

>>14717242
>congress isn't all going to agree that Jims bother-in-law should get the contract
rather naive reasoning
They don't say: "hello, mr congressman, vote for giving contract to my brother-in-law company, we're friend right?"
That's not how that works.
They say something like: "Hello mr. congressman. As you know, JimCorp inc. (whose founder happen to be my brother-in-law) is a major job creator and giving this fine company the contract means we will be able to create up to 50 additional, high value and prestigious jobs in YOUR voting district. You will vote in its favour of this major contract, right? You can only gain political support by this. As you may know, the second contender is BobHolding ltd., which has no plans in aiding your district in any way. As a representative for your district, it is your moral duty to be the voice of your electorate who will benefit the most"

Reminder that ONE senator managed to block even mentioning fuel depots in all NASA papers for well over a decade because it might potentially endanger jobs in his state.

>>14717431
My point is when one guy can make calls nepotism is quick and easy, look at Trumps appointments. But for anything that requires several people to agree it's at least a little harder.

>>14717281
SLS seems like the most obvious answer

>>14717439
fair enough

>>14717425
because it's not a moon, we live in a binary system

>>14717425
>>14717451
Now I want to see this with Pluto and Charon

>>14717451
Wrong

>>14717397
NOW DRAW HER GIVING BIRTH
>>14717281
I'd say the Falcon 9, though as an object of scorn since most IFLS types tend to think we should be feeding ooga boogas in Africa instead of actually advancing our technology and reach.

I'm gonna seethe so hard if the Polaris EVA suit isn't shiny Starship metal.

I just saw two starlink satellites fly overhead for the first time. Beautiful

why is it approaching from the bottom

>>14717541
Current dragon suit + tether. Possibly a small backpack power / air supply / thruster element.

>>14717565
>Current dragon suit + tether
+ wrapped in aluminized foil
>Possibly a small backpack power / air supply / thruster element
no use for that at all

>>14717555
No you didn't

>>14717565
>Current dragon suit + tether. Possibly a small backpack power / air supply / thruster element.
>implying
Hawthorne unironically works harder than Boca. The suit will be completely overhauled, every piece of it getting a design pass.

As this thread is about space flight, I thought you may want to know Nichelle Nichols who played Uhura in TOS passed away yesterday.

>>14717575
https://archive.macleans.ca/article/2005/5/30/the-star-trek-connection
>THE STAR TREK CONNECTION
>A surprising number of child sex abusers appear to be Trekkies. Trying to figure out what that means, however, shows how little we really know about pedophiles

>>14717603
We win again, animebros.

>>14717248
Have experiments with electricity and strong permenant magnets been done on space stations? If so are there any differences in effects at all?

I geuss air would be in there, but still maybe 0 g has some effects.

Maybe some inflatable cube can be made that can go out in space strongly tetherdd to the station, and experiments can be conducted in there having it not full of air; maybe robots can do the experiments

>>14717205
NASA's version of man-rating requires implementing manual controls as well as an abort system that works in a variety of conditions, it's not as simple as saying "you can survive the G-forces, get in"

https://nodis3.gsfc.nasa.gov/displayDir.cfm?Internal_ID=N_PR_8705_002C_&page_name=Chapter3

>>14717634
Fuck off redditspacing retardposter.
Your questions haven't increased in quality.

>>14717634
go away simpleton

>>14717642
I'm

Sorry

I

Can't

Contribute

As

Much

To

The

Thread

And

Humanity

As

You

>>14717181
What about japs H-III for DreamChaser and Cygnus?

>>14717476
>Now I want to see this with Pluto and Charon
Not a planet, may as well wonder about the skies of those binary asteroids

Elon using Starship to deliver 100mt thermonuclear warheads to africa to wipe out niggers when?

>>14717108
transformers was produced by toei animation

>>14717353
he had a 90% approval rating in spring 1991 and then ended up getting less than 38% of the vote 18 months later

I'm a sex addict. I copulate with woman, and am completely straight. That being said... I wouldn't hesitate to engage in sexual congress with any man that would have me. As a straight space flight enthusiast, how can I reconcile this? The thought of a big strong man throwing me to and frough is enough to make me squeel with excstasy. I sometimes pretend to be a woman. Does any of this disqualify my from going on upcoming manned spaceflight missions? Again, I'm completely straight.

>>14717693
you're not as smart as you think you are

>>14717694
That does not pertain to my question. But I am probably smarter than I assume.

schizo vs attentionfag

>>14717658
It might work. We don't have a lot of good numbers on what the H3 is supposed tothen again lift to LEO, but we don't have too many figures on what Dream Chaser is going to weigh either. If the 4 SRB version can lift Dream Chaser it's a viable option. If it needs the H3 Heavy then it's probably not since that'd be paying for way more rocket than the job requires. Launching something lighter like Cygnus shouldn't be much of a problem.

Either way, the LE-9 needs to stop eating its own turbopumps before we make any real speculation.

>>14716421
>surely I'll fit in if I start calling random people /pol/tards like I see all these other people doing

>people still respond to the attentionwhore
>>14717425
I would've expected Pluto's moon to appear massive in it's "sky" but not sure how the naming convention works for dwarf planet. Also expected Io to be larger.
>feeds material into the strongest magnetic field, making exploration of Europa very difficult
FUCK Io

it's over

>>14717735
this cant be happening

>>14717739
Unfortunately, it is.

>>14717735
>russian proof chicken requires CAPTCHA

>>14717694
What gave it away?

>he thinks he's clever with his desperate comments
>he thinks he has any idea at all

>>14717745
1. Look at TPS. Can't make very wide doors.
2. Header tanks take a lot of space.
https://twitter.com/RingWatchers/status/1549874929658724352
I wouldn't be surprised if the new cargo Starship had Shuttle-style doors. Fully reusable vehicles are cursed.

>>14717735
If there will be no cargo variant, Starship is dead. big if tru. Also:

>>>/mu/111793709
Notice how this double-nigger attention seeker goes into any thread and tries to make it about himself. Same posts, same responses, and even samefagging. Jannies, please clean it up

>>14717770
Ignoring trolls is just too hard for some people.

spacex stans love the word iterate so much

>>14717770
That's not me.

what does a header thank have to do with the cargo variant? what am I missing?

I got kicked out the discord this morning. I'm part of the mod crew. They found out that I think SLS is good for space, I accidentally posted a SLS poster as I was searching for a pic of Grimes. It's the only place left to speak to females that I haven't been ostrige sized from. I feel like a pile of shit.

>>14717783
Big header tanks means that the version of cargo Starship, which is still present on the official SpaceX website, cannot exist.
Just compare this photo to >>14717760

>>14717783
The header tank would have to be attached on one clamshell only or alternatively have a latching point on it.
Additionally it increases the requirements for rigidity and power of the hinges and actuators though you could argue in zero-g it doesn't matter much as long as it's tightly latched on the way up. (which is super hard btw with 50 tons of fuel or so sloshing around in the nose)
I would wager for most cargo, starship will just have a big ass door on the barrel section of the payload area.

>>14717778
Why wouldn't one use a word that accurate describes what is happening?

4.5m Shuttle fairing ---> 2.4m Hubble mirror
9m Starship fairing ----> 4.8m future space telescope mirror

Seems like a good investment since it would be a shrouded monolithic mirror, compared to a segmented deploying mirror and a deployable sunshield this would be much cheaper. only a couple of billions

>>14717812
>compared to a segmented deploying mirror and a deployable sunshield this would be much cheaper
you're wrong. segmented mirrors are the cheaper design even if they're not folding.
also how much jwst cost has no bearing on the argument i just made.

>>14717815
Why are they cheaper?

>>14717796
>is still present on the official SpaceX website
kek that image drastically undersells starships payload volume

>>14717822
Yeah, I've just noticed that for some reason that only the nose section is used in that image. Weird.

>>14717796
>mfw their own image doesn't even show the real payload space
What would be the ramifications of them fitting an extra rung or two of barrel section and making the nose rounder to have the same total height, but more useful payload volume?

>>14717818
Mostly because the cost of polishing a mirror to nanometer precision grows superlinearly with area.
But also if you have many identical assemblies you benefit from a little economy of scale.

>>14717829
>real payload space
How do you know the real value? At SpaceX, everything changes every two weeks.

>spacex has 500 software engineers
>200 are for starlink
the fuck

Will starship be automized like dragon? Or will it be piloted at certain points? Obviously landing will be done by computers, but I'm wondering if it is all plugged in control data. Let's say something comes up. Will there be manual control? Apollo relied on expert pilots, also the shuttle. Will comanders of starship need to be pilots? And yes, I know dragon can be "flown" via touchscreen. I'm imagining a scenerio in which a pilot needs to do a tactical insertion. Doing a low flyby of a base on ceres to kick up dust, before deploying a laser array, or things of that matter? I consider myself to be a pilot, and certainly would be a major canodite for such endeavours.

>>14717831
Doesn't this simply move the complexity from the mirror to the alignment system?
As an aside, my dad worked at Perkin-Elmer when they fucked up the mirror for Hubble. He didn't work on it, but I still give him a hard time about having been there but it's all in good humor.

>>14717848
>he doesn't know about software
you're going to be really sad if you keep going down this hole

>>14717835
not what I said. I said useful payload volume. The tapering of the nose reduces the width to length ratio of a possible payload.

>>14717848
it ain't that easy in bringing viable internet access to the entire world

>>14717660
Yeah, I do

>>14717796
Open the pod bay doors Hal

>>14717873
https://en.wikipedia.org/wiki/90_Antiope
each asteroid is about 27 degrees across in the sky of the other

>>14717850
Did the Shuttle really need a pilot? Buran was able to land pilotless. Think NASA HR simply liked having astronauts appear in charge, even if the engineers didn't.

>>14717865
why will I be sad? tf?

>>14717905
Depends, what specifically about
>spacex has 500 software engineers
>200 are for starlink
are you confused about?

>>14717898
Well, that is what I'm getting at. The time you need to invert the bird. Will the engineers rather a ship crashes, or let an expert pilot get the job done through abstract methods?

>>14717924
they'd rather a ship crash with no one on it

>>14717928
stop already

>>14717911
it's now clear the one confused is you

>>14717911
Probably doesn't understand that the software for a constellation of communications satellites is a bit more complex and must be more reliable than the CRUD app that display's the cafeteria's lunch menu at his company.

>>14717928
>>14717930
Could a starship programmed by engineers defeat a piloted shuttle in combat?

stop samefagging you useless faggot

>>14717812
I'm waiting for the 6 launch mega mirror. Assemble itself and count the hairs on your head from HEO

Nasa Space Flight?
more like cucks r us

uh oh muskbros. . .

>>14717898
The shuttle couldn't land autonomously until after Columbia. There were concerns early on that a late 70s era autopilot wouldn't be up to the task, but the biggest hurdle later in the program wasn't a data connection between the flight computer and the landing gear controls. That got left out originally because the shuttle didn't have the ability to retract its landing gear after it deployed them and the designers didn't want a computer glitch dropping them while the shuttle was still in orbit. After Columbia they whipped up a cable to connect the two systems and stored it on the station in case another orbiter tore up its titles during the remainder of the program.

>>14717931
the entire flight software for dragon is written by the same team that wrote the flight software for f9 and they're 20 people.

https://youtu.be/ETBhkDnZvuM
New Edgar kino

How fast can Starlink ramp up customers?

>>14718028
starship flight rate * sats per starship * customer per sat

>>14717051
you misspelled lori garver's name and it made me think i was a retard

more space stations, lots more

>>14717162
this
>>14717093
link to the account then faggot

>>14717952
Let me guess: people are subscribing in greater numbers than anticipated so the pace of deploying satellites isn't fast enough to keep up with the increase in bandwidth used.

>>14718055
eh it must be intentional because they use the wait list to limit customer influx

>>14717928
they expect one of us at the wreckage brother

Dunno if this was posted, but Starlink released a report on the technical details of how they decreased its albedo. Astroonomers and doomers BTFO.
https://api.starlink.com/public-files/BrightnessMitigationBestPracticesSatelliteOperators.pdf

>>14716657
> Australia
> building anything
> 12 year delay because some abos claim they think space is racist
> cost blowouts on ice creams for the lads from the corner store
Entire country is more fucked than oldspace

>>14718073
b-but emerald child slaves, kessler syndrome

>>14718091
> 12 year delay because some abos claim they think space is racist
Literally what's happening now in northern Sweden but instead of abos it's Samis claiming it disturbs their reinder fucking.

>>14718106
Many such cases

>>14716745
aren't spacex making their own steel now?

sovl

>>14718119
>WoKKKeist
Lol, based Zubrin

>>14718119
Astroshits have done exactly nothing to deserve getting any more new telescopes or properties. Do something other than waste money if you want to justify your grandiosely large senses of entitlement.
You tards wasted the last 4 decades ridiculously looking for imaginary dark matter while jacking off to your imaginary IQs

>>14718128
not for the rings. just engines.

>>14718135
Literally nobody in astronomy looks for dark matter; that's all particle physicists trying for direct detection. Astronomers are only able to improve the error margins in their values with better instrumentation, and JWST is already doing wonders to fix a lot of things that were unknown or incorrectly assumed.

>>14718149
>JWST is already doing wonders
IT HASNT DONE SHITE. LOOK FOR EXOPLANETS IN A 10 LIGHT YEAR RADIUS NIGGER.
NONE OF THE FAGGY NEBULAE MATTER

>>14718119
Based Zubrin

>>14718149
Astroshits need to gtfo /sfg/. Stop trying to bask in our reflected glory, you are not one of us, you do not contribute to spaceflight, you sit around and jack off to your imaginary large IQs which somehow or other aren't capable of producing anything worthwhile. You might of thought you were welcome here because of JWST, but its launched and functioning fine, so its no longer an /sgf/ topic. We built it for you because astroshits can't even built their own telescopes anymore. Used to be a large focus of the disciple 100 years ago, these days astroshits are too stupid and lazy to do the job. Go away, don't bring the stench of your failure and incompetence into /sfg/, its disgusting

>>14718153
>IT HASNT DONE SHITE. LOOK FOR EXOPLANETS IN A 10 LIGHT YEAR RADIUS NIGGER.
Direct imaging of exoplanets with enough information to find out habitability can't be done unless they actually build a sufficiently large telescope. LUVOIR-A would be sufficient.

>>14718161
I'm trans btw

>>14718153
Newsflash: exoplanets don't matter either. All these discoveries are just circlejerk material for astronomers. Only thing that matters is settling Mars, then the Jovian moons and Titan.

>>14716657
>Why hasn't Australia gotten into the space race?
Because if it isn't easy money that involves digging up and selling dirt or selling houses to each other then our government isn't interested. Long-term economic planning and strategy isn't a strong point of Australia otherwise we'd still have a strong manufacturing sector and publicly owned utilities.

We're called 'the lucky country' in spite of our governments, not because of them.

>>14718153
>LOOK FOR EXOPLANETS IN A 10 LIGHT YEAR RADIUS NIGGER
that was never the mission though or what it was designed to do. where did the meme that JWST was gonna be able to find and photograph exoplanets come from? feels like something that only cropped up shortly before it launched. pop-sci journalism spreading false sensationalist expectations?

astronomers be like

>>14718177
>pop-sci journalism spreading false sensationalist expectations?
NASA spent billions building a telescope with $500 million worth of capability, to justify the massive get overruns they added on a lot of false claims. NASA does the same this every time the go 1000% or more over budget. When the shuttle first launched, NASA was promising that there would be 1000 completed shuttle missions by the end of the century because it was going to be that reliable and quick to turn around.

>>14718177
JWST is doing spectroscopy of transiting exoplanet atmospheres.

>>14716745
>Time to manufacture a Starship: 1 month per Elon.
>there's only one Elon
>SpaceX can only build one Starship per month
How do they expect to have a fleet of thousands of Starships? It's over.

>>14718195
well right now his baby making cadence is higher than starship flight cadence.

>>14718106
That looks cool with the snow

>>14718203
https://youtu.be/ir1BfsdSswY
https://youtu.be/eiRsoGnrKJA
Hopefully we will see some kino orbital launches soon

https://www.youtube.com/watch?v=0fZ-r5Qe3tM
Someone visited Buran again, if you want to be depressed

Actual video starts at like 34 minutes in

>>14717026
Go away pedo

>>14718238
Already got posted >>14717141

Would unironically want to do that journey myself, 50 bucks fine is nothing.

>>14718245
snate my love...

wen launch

>>14718276
august 13

>>14718301
This post was probably made by collagefag. He's been trying to blend in.

>>14718276
july

>>14718301
>go to NASA's page to get photos of the bicentennial star
>it's down
reeeeee

did docking with soyuz hurt apollo's prestige? imo it would've been better to send up a gemini b so as to avoid the soviet propaganda coup of getting to act like their leaky little spaceship with busted parachutes was on apollo's level.

>>14718326
Apollo was out of things to do. Meanwhile it was like christmas morning for soyuz

>>14718326
>did docking with soyuz hurt apollo's prestige? imo it would've been better to send up a gemini b so as to avoid the soviet propaganda coup of getting to act like their leaky little spaceship with busted parachutes was on apollo's level
cringe post m8

>>14718326
At that point Apollo was just shuttle-lite: 23 tons to LEO

What you're really seeing is the first incarnation of the ISS

>>14718326
Kill yourself you subhuman /pol/tard

>>14718326
Either great bait or a genuine retard.

>>14718326
Ending production when they did hurt it. They should have kept it flying on the Titan III until the Shuttle finally got its act together.

>>14716408
It is, sfg isn't even talking about the BE-4

>>14718343
What's there to talk about, Jeff?

Engines haven't shipped yet

>>14718343
This. As everyone in the industry knows, BE-4 is a game changer

>>14718343
>BE-4
not spaceflight related

reminder that space tenga has more successful launches under its belt than be-4

>>14718326
>>14718310

>>14718344
>>14718347
>>14718357
A flight ready be-4 is a big deal, starship cannot carry the entire industry

>>14718370
At its expected launch cadence Vulcan and New Glenn will be a footnote in the tonnage to orbit totals

>>14718370
starship can carry the entire non-spacex industry in a couple of launches a year

>>14718301
Not sure why but something about that image makes me think of Radio Shack.

>14718370
>A flight ready be-4 is a big deal
That would imply either Vulkan or NG being a big deal which they really aren't.

>>14718370
Lmao the crazy part about starship is if they even hit a tenth of the turn around time they want
A single starship could launch the entire worlds payloads. Just a single starship

>delusional muskrats in my /space ferociter gradatim/

>>14718339
Reading up on Shuttle history, it was funny how they tried to justify it when the Titan III existed. Kind of like SLS and Starship today.
>You're designing a fully reusable spacecraft that can do $10,000 per kg?
>Well this expendable, solid boosted rocket can do $5000 per kg.
>NOOOOO YOU CAN'T DO THAT BECAUSE....YOU JUST CANT

>>14718384
>/space ferociter gradatim/
kek

why did lockheed jump onto the national team instead of doing a ULA bid with their own lander fueled by vulcan-ACES? using the HLS money to develop ACES would've potentially kept vulcan competitive with starship for destinations beyond LEO and there's no way their lander would've flopped as badly as blue's did.

>>14718393
Because game theory. They figured they had better chance by combining efforts with BO and others. Vs going alone.

Congress asked NASA to choose upto 2, so it was SpaceX with likely win for one of the spot and the 2nd slot was either competing against each other or combing efforts to fleece 3+ billion each.

>Because game theory

>>14718373
Yes however it will keep a certain amount of demand away from starship
>>14718375
It needs as much as possible for mars.
>>14718381
A single starship launch cannot deploy in every orbit wanted. You want other rockets to share the demand.

>>14716745
>45M for Starship & SuperHeavy
vs
>$2Bn for SLS
>each has 100T LEO optionality
>only one of them is reusable, but even if Starship/SuperHeavy was not reusable, for the price of a single SLS launch of $4Bn, you'd get: 88 Starship + SuperHeavy builds
>which means that for each SLS in launch cost, you'd be able to put up 13,200T to LEO.
I mean, even if it cost $100M to build one, that's 20x on average less than SLS.

>>14718414
>language shapes thought
This is literally true and half the reason why the only civilized people on the face of the planet speak English.

>>14718373
Slightly related, but I find it extremely funny that Jeff's hate boner for Elon is so big and petty that he literally bought off every single other launch vehicle apart from Falcon 9. And in doing so, he forced every other customer to SpaceX since they were the only ones that still had rockets.

>>14718445
I like that I'm actually old enough to remember the wave of constellations that tried to happen in the late 90s. Kupier is a big deal but there's absolutely no guarantee that it happens.

>>14718434
$4.1 Billion. You need the Orion capsule+SLS since Starship+Superheavy is being counted here.

>>14718359
The rocket is called Momo, that launch was sponsored by tenga

I am the proud owner of 16 of these bad boys. 3 stamped (oh yeah). Want any, Finnanon?

>>14718301
wtf is "VSVN"??

>>14718497
Virtual Sex Visual Novel

>>14718497
Must be some new Indian space vehicle.

new starlink chan

So apparently McCulloch is finally posting lab results on twatter. QI might be proven this year.

>>14718153
>IT HASNT DONE SHITE
It's been in full operation mode for like a month out of its projected 20 years of service. Of course it didn't do much.

>>14718522
As opposed to a real life sex visual novel?

>>14718558
Between this and Webb, it will be a bad year for einsteiniens

>>14718558
QI was already disproven.

>>14718418
>A single starship launch cannot deploy in every orbit wanted.
yes it can

>>14718563
No it's not.

>>14718440
I agree that it's true, but how did you come to the "only civilized people on the face of the planet speak English" conclusion?

>>14718569
>pokes hole through folded paper
ok buddy

There’s a movie about the Thai boys in the cave that got trapped. Will it have an ELON BAD!!!! Moment?

>>14718569
kek

>>14718588
>Will it have an ELON BAD!!!! Moment?
HAHAHAHAHAHAHA
elon will be a main character and the bad guy

>>14718552
Why does she look like a child. Anthropomorphic spacecraft are sexy when they look like adult women.

>>14718598
this

>>14718602
This is great we need more like this

>>14718562
that's just porn

>>14718565
t. LCDMIDF

>>14718572
It's a common conclusion.

https://amgreatness.com/2022/02/26/this-happy-breed-of-men/

>>14718618
Yeah, I'm not reading all of that, especially not from a website called "American Greatness" (they are clearly biased). Can you just give a shot summary/conclusion?

>>14718618
You're not going to convince me that people who decided to build shuttle or sls had a common sense.

>>14718552
i want to breed her

>>14718695
She is not real.

>>14718639
tl;dr English is well suited to freedom for the same reasons it's well suited to science and commerce: it keeps you grounded to external reality rather than infinite spirals of bullshit.

>>14718552
cute. i like the laser too

>>>/a/

>>14718190
Why don't you show us where NASA made all these false claims? You won't find them because they never claimed it would go far in terms of direct imaging exoplanets.

>>14718558
>Posting shit on twitter
>Empirical proof
Not the same thing. Remember that even if he gets shit published it's only worth a damn if it can be replicated. It is literally just EMdrive v2 and we all know how Shawyer still claims his experiments work despite a series of null results.

>>14718565
Indeed.
https://ui.adsabs.harvard.edu/abs/2019MNRAS.488.4740P/abstract

>>14718700
>>14718618
what a brainlet take
this reasoning could be thought up only by somebody who can't speak (let alone think in) any language other than English
and that's not a compliment, even though English (and Americans) think ignorance is a virtue
>well suited to freedom
Ask the Irish what they think of unique English freedom, individualism and religious tolerance.
>well suited to science
English is so well suited for science that all scientists speak in mangled greco-latin

>>14718618
Can you just fuck off you subhuman retard? This isn't your subhuman mutt echo chamber, that's >>>/pol/

>>14718852
Cry more

>>14718618
>what is Europe and the 23 non-english languages

>>14718323
https://en.wikipedia.org/wiki/United_States_Bicentennial

>>14718323
Link rot is real. I was looking for HD Apollo photos the other day and the links were either redirects to some homepage, or outright 404'd.

>>14718497
>wtf is "VSVN"?
australian nasa, duh

>>14716786
a woman over 30 who doesn't know how to use her phone

>>14718376
Radio what?

;_;

>>14719350
kek

>clear shot of #Tiangong from ground, taken on Aug.01 from Beijing
https://twitter.com/CNSpaceflight/status/1554094798008565760

>>14719399
cool

https://www.youtube.com/watch?v=sexXnZ2kOjw

>today's closure canceled
another slow day

>>14719423
Don't you have anything to do?

https://twitter.com/Astra/status/1554091607015559168
kemp gonna speak at a financial event next week
fun times ahead between this and quarterly earnings thursday

>>14719465
im looking for reasons to procrastinate

Tiangong

https://twitter.com/byspto/status/1554008532449648641?s=21&t=9OncRwfeV0cnCQeMmvVfuQ

>>14718856
Mostly stagnant

Everything is fine
https://spacenews.com/nasa-companies-reject-concerns-over-commercial-space-station-development-schedules/

>>14719417
This guy constantly shills both the aerospike nozzle concept (despite it being heavier and more difficult to cool while offering minimal to zero real world performance improvements), and he also clearly doesn't understand why stable metallic hydrogen would be such an awesome rocket propellant.
To get into that second point, the reason metallic hydrogen is based is because it's got so much potential energy packed into its structure that when it releases that energy by decomposing, it heats up to something like 7000 Kelvin or something ridiculous like that, which means that it's so hot that chemical bonds don't form between the hydrogen atoms, meaning the exhaust is 7000K monatomic hydrogen, giving it massive specific impulse. However, this guy then goes on to talk about octaoxygen, and using that to burn the metallic hydrogen. He doesn't understand that at metallic hydrogen decomposition temperatures the oxygen and hydrogen atoms would not be able to bond to one another anyway, meaning you'd pretty much get equal performance if you were spraying in liquid krypton or whatever other inert propellant. In fact it would be worse, because as he mentioned, octaoxygen would be a solid material, so you would need to use it like a hybrid rocket motor (shit) where the addition of oxidizer reduces the Isp (shit) and doesn't appreciably increase thrust output (shit) while also needing to somehow prevent that octaoxygen from simply detonating into oxygen gas due to the heat and the fact that it's not being compressed under gigapascales of pressure inside a diamond anvil (big shit).
Anyway this guy fundamentally is making the mistake of equating higher performance with better economics, which is not true. In rocketry, whatever is more convenient and easier to rapidly reuse offers better economics, full stop.

>>14719504
Some scoops by astranon would be nice

Russia is sending their own ISS. I swear I feel like most nations will make their own ISS… it’s going to be a problem

https://twitter.com/ID_AA_Carmack/status/1553067032610045956

Long thread by Carmack on suborbital space companies

the chinese rocket pieces landed just a few hundred meters outside of villages in indonesia and malaysia
https://twitter.com/marufins/status/1554112442556612609

somebody stop the chinese

>>14719673
the more space stations the better

>>14719663
If the claims here are true, he'll almost certainly announce the death of Rocket 3 at one of these.

>>14719690
based carmichael

>>14719702
Stop Space-x first

>>14719673
What the heck is that deathwheel thing

>>14719761
Looks like a radioantenna of sorts, kind of like the USSR had on Salyut-6

>>14719772
What is its purpose?

>>14719781
To be a radiotelescope, or if it's pointed at the ground it could function like the Synthetic Aperture Radar that the Priroda module had on MIR

Uganda wants to partner with Roscosmos for its space program

>>14719826
what's wrong knuckles? fraid of a little chinky?

>>14719826
>Russian reactor designs

>>14719837
Can wait for the Ugandan remake of the Chernobyl series.

How small can a staged combustion engine practically get? Is there a crossover point between staged combustion performance and expander cycle performance where, below a certain thrust level, it always makes sense to use an expander cycle? Are staged combustion engines even that hard to design or is it more a matter of developing the right materials and alloys? Finally, why didn't americans in the ~1960s go ahead and try to build a fuel rich methalox staged combustion engine instead of writing off staged combustion completely? sfg should be able to answer these questions

>>14719826
>>14719837
I love Uganda, they dream big but have no infrastructure to support any of it. While the idea of Uganda running a Soviet reactor design is terrifying I'm happy for them.

>>14719935
>How small can a staged combustion engine practically get?
No idea.
>Is there a crossover point between staged combustion performance and expander cycle performance where, below a certain thrust level, it always makes sense to use an expander cycle?
Exactly, at about ~150 kN the expansion of hydrolox can't overcome the chamber pressure to provide high enough flow rates.
>Are staged combustion engines even that hard to design or is it more a matter of developing the right materials and alloys?
Materials, the oxygen rich side wants to melt just about everything.
>Finally, why didn't americans in the ~1960s go ahead and try to build a fuel rich methalox staged combustion engine
Liquid methane has all the issues of cryo-fuels without the amazing ISP of hydrolox, the only reason anyone is playing with it today is because it can be made on Mars.

>>14719935
>Finally, why didn't americans in the ~1960s go ahead and try to build a fuel rich methalox staged combustion engine instead of writing off staged combustion completely?
i don't think it was until the saturn improvement studies looked at the hg-3 as a concept that americans decided staged combustion was even a concept worth pursuing

What can SpaceX's current investors and employee RSU's actually DO with their holdings right now?

You have to be invited in to even hold shares, and there are big fish involved such as Google, Goldman Sachs, etc.

Do they have any option to cash out or transfer them/sell to other parties? Guess I am just concerned about a crash on wall street fucking up SpaceX's investor bank.

>>14720007
There is probably an IPO agreement, no major investment firm is going to throw money in without a binding legal document that has an IPO date and price on it.

>>14719702
>Once rocket go up, where it come down?
>"Is not my department!" say Wang von Chang

>>14720016
OH NO NO NO

>The fact that whenever someone reports on something about chinese debris falling in villages and populated areas, people only "attack back" by linking to articles about SpaceX and only SpaceX goes to show that it is not that they're concerned about debris, it's all whataboutism.
https://twitter.com/Alexphysics13/status/1554144904653291526

Why do spin prime tests cause explosions but not static fires or preburners

>>14719998
>Exactly, at about ~150 kN the expansion of hydrolox can't overcome the chamber pressure to provide high enough flow rates.
You have misunderstood why expander cycles have an upper size limit. It's because they run off of heat conducted into the chamber walls from the hot burning gasses, and as you scale up an engine, the volume of propellant being pumped increases faster than the surface area inside the engine, which effectively means there's less heat per unit of propellant, which means the expander cycle gets less and less effective until it stops working altogether. In any case, my question was more along the lines of "would a 1kN expander cycle engine be better than a 1kN staged combustion cycle engine or is it a wash or does the staged combustion cycle remain superior".
>Materials, the oxygen rich side wants to melt just about everything
Oxidize, not melt. You're blowing high pressure warm oxygen over metal, if that metal isn't VERY good at resisting oxidation it will catch fire. it's not about the heat generated, it's about the amount of singlet oxygen and oxygen radicals flying around.
>Liquid methane has all the issues of cryo-fuels without the amazing ISP of hydrolox, the only reason anyone is playing with it today is because it can be made on Mars.
Wrong, methalox is actually a very good bipropellant. On paper it's less dense than kerolox and has lower Isp than hydrolox, but the fact that it lets you use the FFSC cycle means that it's actually superior in real terms (stage delta V and payload performance) compared to either kerolox or hydrolox, which is why almost every new rocket is taking up methalox propellants regardless of whether they have ISRU plans in the future.

>>14720051
>he fact that it lets you use the FFSC cycle means that it's actually superior in real terms (stage delta V and payload performance) compared to either kerolox or hydrolox
so does the rd-270 prove udmh/n2o4 is superior to both of those too?
(you can do ffsc with hydrolox btw)

>>14720044
Spin test didnt cause explosion. The pressurized methane exhausted without controlled burning or quick dissapation caused the methane to combust. In a static fire, the methane is already light up in a controlled fashion and it exhausts properly.

>>14720044
Because static fires and preburner tests ignite the propellants inside the engine and therefore do not allow large clouds of methane vapor to mix with air.

>>14720062
The FFSC cycle is not good enough to overcome the lower Isp of hypergolic propellants, however it's still good enough that the RD-270 was a very good engine, it's too bad they didn't get all the kinks worked out in time to use it on a launch vehicle.
I knwo you can do FFSC with hydrolox too, in fact that's the only combustion cycle any large hydrolox engine should be using in my opinion. The thing is that hydrogen's very low density means that methalox FFSC is still almost equally competitive despite the Isp advantage of hydrolox, and if you consider reusable launch vehicles FFSC methalox becomes the GOAT.

>>14720064
>>14720070
Thanks. Is this also why a smaller scale spin prime test like on Starship doesn’t cause issues because the less methane wafts away in the wind?

>>14720051
>You have misunderstood why expander cycles have an upper size limit
No, I described the issue and you described the cause of the issue. The reason the reduced heat transfer matters is reduced fuel flow rate at high chamber pressures.
>Oxidize, not melt.
An oxyacetylene torch cuts metal through oxidization but I don't think anyone would complain about the term "melt" being used there, you are being pedantic.

>>14720092
yup basically.

>>14720092
Yeah, larger surface area for methane to wash away in wider open area. Superheavy with full 32 engine exhausting pressurized methane caused the methane to combust as the large amount of methane didnt have time to dilute away into atmosphere.

>>14720094
>No, I described the issue and you described the cause of the issue. The reason the reduced heat transfer matters is reduced fuel flow rate at high chamber pressures.
Uh huh, because there's less heat for the propellant to absorb. Regardless, my question was if expander cycles improve continuously at smaller scales enough that they dominate over staged combustion engines at that scale. I didn't ask about upper size limits, I'm asking about lower bounds.
>you are being pedantic.
I am being correct. Designing an ORSC turbopump and preburner assembly is all about limiting oxidation, not about preventing melting.

>>14720102
>>14720097
Tbh can they just do spin prime tests on the booster with sets of five or six engines? Or do they NEED 33? Im also curious if there are failure modes involving 33 Raptors we don’t know about ouch.

>>14720107
They already said they're going to do spin prime tests with small groups of engines now. They don't need to do all 33 at once, no.

>>14719998
>Liquid methane has all the issues of cryo-fuels
It doesn't cause embrittlement
It doesn't freeze LOX
It doesn't try to escape from almost everything

>>14720051
Youre not as smart as you think you are.

>>14718598
I think it's supposed to be like a fairy or something, judging by the large solar panel wing.
>>14718703
Seems like a (mostly) former chad of /a/ must activate again.
>>14719826
>do u kno de wae
>Uganda somehow turns into an even bigger Chernobyl

I'm smart enough to not be a fucking namefag.

>>14720267
But not smart enough to not reply.