this post was submitted on 14 Oct 2024
172 points (81.2% liked)

No Stupid Questions

35804 readers
1404 users here now

No such thing. Ask away!

!nostupidquestions is a community dedicated to being helpful and answering each others' questions on various topics.

The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:

Rules (interactive)


Rule 1- All posts must be legitimate questions. All post titles must include a question.

All posts must be legitimate questions, and all post titles must include a question. Questions that are joke or trolling questions, memes, song lyrics as title, etc. are not allowed here. See Rule 6 for all exceptions.



Rule 2- Your question subject cannot be illegal or NSFW material.

Your question subject cannot be illegal or NSFW material. You will be warned first, banned second.



Rule 3- Do not seek mental, medical and professional help here.

Do not seek mental, medical and professional help here. Breaking this rule will not get you or your post removed, but it will put you at risk, and possibly in danger.



Rule 4- No self promotion or upvote-farming of any kind.

That's it.



Rule 5- No baiting or sealioning or promoting an agenda.

Questions which, instead of being of an innocuous nature, are specifically intended (based on reports and in the opinion of our crack moderation team) to bait users into ideological wars on charged political topics will be removed and the authors warned - or banned - depending on severity.



Rule 6- Regarding META posts and joke questions.

Provided it is about the community itself, you may post non-question posts using the [META] tag on your post title.

On fridays, you are allowed to post meme and troll questions, on the condition that it's in text format only, and conforms with our other rules. These posts MUST include the [NSQ Friday] tag in their title.

If you post a serious question on friday and are looking only for legitimate answers, then please include the [Serious] tag on your post. Irrelevant replies will then be removed by moderators.



Rule 7- You can't intentionally annoy, mock, or harass other members.

If you intentionally annoy, mock, harass, or discriminate against any individual member, you will be removed.

Likewise, if you are a member, sympathiser or a resemblant of a movement that is known to largely hate, mock, discriminate against, and/or want to take lives of a group of people, and you were provably vocal about your hate, then you will be banned on sight.



Rule 8- All comments should try to stay relevant to their parent content.



Rule 9- Reposts from other platforms are not allowed.

Let everyone have their own content.



Rule 10- Majority of bots aren't allowed to participate here.



Credits

Our breathtaking icon was bestowed upon us by @Cevilia!

The greatest banner of all time: by @TheOneWithTheHair!

founded 1 year ago
MODERATORS
 

So I've heard and seen the newest launch, and I thought for a private firm it seemed cool they were able to do it on their own, but I'm scratching my head that people are gushing about this as some hail mary.

I get the engineering required is staggering when it comes to these rocket tests, but NASA and other big space agencies have already done rocket tests and exploring bits of the moon which still astounds me to this day.

Is it because it's not a multi billion government institution? When I tell colleagues about NASA doing stuff like this yeaaaars ago they're like "Yea yea but this is different it's crazy bro"

Can anyone help me understand? Any SpaceX or Tesla fans here?

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 33 points 1 month ago (2 children)

The Space Shuttle missions did not recycle the rockets, not to mention that the SpaceX missions were rated super-heavy: Only Apollo has done this before in America.

Imagine NASA crashing 4 Shuttles before getting landing right.

You think they didn’t?

[–] [email protected] 10 points 1 month ago (2 children)

The Solid Rocket Boosters (SRBs) from shuttle launched were recycled. They parachuted into the ocean after being jettisoned and were recovered and refused. They just didn't land themselves. The external fuel tank was not reused.

[–] [email protected] 15 points 1 month ago (1 children)

There was an extensive amount of refurbishment required to re-use the SRBs. Not to mention they had to be physically recovered, and salt water certainly made the process more complicated.

The shuttle itself needed each of its heat shield tiles replaced, which due to the shape of the shuttle were all unique.

The fuel tank was not reused.

The shuttle was meant to be a leap forward in rocket reusability, but it didn’t really pan out that way. There’s good reason the program was scrapped and not replaced with another space plane.

The Starship booster has the potential to launch multiple times per day. The only refurbishment period is how long it takes to refuel it.

[–] [email protected] 4 points 1 month ago

Agreed. As I mentioned elsewhere, Falcon 9 is still revolutionary, but I was just clarifying that the SRBs were recycled, as that is sometimes forgotten.

[–] [email protected] 5 points 1 month ago (1 children)

TIL, thanks. That’s just a small part of the rocket though

[–] [email protected] 5 points 1 month ago* (last edited 1 month ago) (1 children)

Between the orbiter (reused), the boosters (reused), and the external fuel tank (not reused), which parts are not "just a small part" (in terms of technology/complexity/cost, not physical size)?

[–] [email protected] 3 points 1 month ago (1 children)

I take the part about "a small part" back as that's a misleading term for what I meant: The Super Heavy booster is much bigger in both technology/complexity and physical size and has many more parts than the old space shuttle rockets as it needs to carry the weight of two space shuttle orbiters. Plus, spaceplane is weird.

[–] [email protected] 2 points 1 month ago* (last edited 1 month ago) (1 children)

Remember, unless we're talking about Enterprise, "space shuttle rockets" includes the orbiter itself. The orbiter's main engines were where all that fuel from the external tank was going, after all! From that perspective, I would argue that the main "space shuttle rocket" was definitely much more complex than the Super Heavy booster, because the crew stuff, cargo stuff, spaceplane stuff, etc. was integrated into it.

I feel like your criticism of the shuttle system being less reusable than advertised might have been more applicable if we were talking about the Soviet Buran (which indeed used expendable Energia rockets to reach orbit), not NASA's shuttles.

[–] [email protected] 1 points 1 month ago (1 children)

I was under the impression that a "rocket" does not include the payload. Now that I search it up, I am not sure what to call that part.

[–] [email protected] 2 points 1 month ago* (last edited 1 month ago) (1 children)

I was under the impression that a “rocket” does not include the payload.

Sure, I think you're totally correct... if the part with the engine is separable from the part with the payload. But with the Space Shuttle, that isn't the case unless you're limiting yourself to talking about the SRBs. The orbiter is a spaceplane and that makes it weird, but its main engines are rocket engines (as opposed to a hybrid ramjet or something) and it launches vertically, so I think it's still fair to also call it a rocket.

Or as another example, consider the problem scaled aaaaaaaall the way down to something like this:

Is the whole thing a "rocket," or does that only describe the bottom half and it's called something else from the payload bay up?

[–] [email protected] 1 points 1 month ago

In my impression, the payload includes the entire spacecraft, none of which is part of the rocket.

[–] [email protected] 3 points 1 month ago (1 children)

You think they didn’t?

No, they didn't. Enterprise conducted 5 approach and landing tests where she was carried aloft by a 747 and then detached to glide to a landing, three with that aerodynamic tailcone thing, two with mockup main engines to simulate a return from space. Though there were issues with PIO revealed during the last flight, all five of Enterprise's approach and landing test flights resulted in successful landings.

I would not describe any space shuttle as "crashed." Challenger exploded during launch and Colombia broke up during re-entry; destroyed in service yes, crashed no. Enterprise, Atlantis, Discovery and Endeavour all survived service and are on display at museums. No other airworthy space shuttles were built. Explorer/Independence and Inspiration are 1:1 scale models, and Pathfinder was basically a boilerplate meant for testing and incapable of flight.

[–] [email protected] 4 points 1 month ago (1 children)
  1. Okay, I stand corrected, NASA tests probably didn’t disintegrate. But something to consider is that SpaceX has always expected that the pretty early tests would fail as you can see in their statements.
  2. The Starship tests didn’t crash either. The first three disintegrated at different points in time and the fourth succeeded (albeit with one engine failure out of 33 and slight damage on reentry).
[–] [email protected] 5 points 1 month ago (1 children)

NASA blew up a LOT of shit before the space shuttle program. Who can forget Ranger 1 aka Stayputnik that blew up on the pad? But I'm especially thinking of a Little Joe launch, which I think was intended to test the Apollo launch escape tower, which developed an uncontrolled roll and threw itself apart. It was actually considered by NASA to be a double success because the escape system functioned correctly when the rocket was legitimately out of control.

Also, the Space Shuttle was THE WORST idea. It was as safe as barb wire contact lenses; it's God's greatest miracle that it only killed 15 people.

[–] [email protected] 2 points 1 month ago (1 children)

Frankly I'm surprised that I couldn't find any disintegrated SLS flight tests with what happened to Colombia. There was something about Orbiter Integrated Tests but I couldn't find some sort of itemized record on it.

I refrained from bringing up ancient stuff like Ranger because that's a much higher R&D milestone to surpass.

[–] [email protected] 5 points 1 month ago

The space shuttle never flew unmanned. Enterprise did all her glide tests manned, and STS-1 and STS-2 were flown by 2-man crews.

John Young, commander of STS-1, was informed by fellow astronaut Tony England that the House had included the space shuttle program in the budget on April 21, 1972. At the time, he was standing in the Descartes Highlands on the surface of the Moon in his capacity as Commander of Apollo 16.