Questions tagged [reuse]

Questions regarding the reuse of parts or equipment.

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4
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1answer
516 views

Reuse statistics of SpaceX Dragon capsules?

The question about the rolled-up and deployable solar array How does ROSA unroll? (Roll Out Solar Array) begins: The upcoming SpaceX launch with the apparently first re-use of a dragon capsule will ...
21
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2answers
4k views

Do Falcon 9s get a thorough wash or a fresh coat of paint (they look clean pre-reflight)? [duplicate]

Before/during reflight, the boosters look white and clean, but after, they don't. I'm not sure if that's soot and/or burned paint. I looked but it doesn't seem to have been asked before. RE Is Falcon ...
31
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7answers
8k views

Why not land SpaceX's Starship like a plane?

I get the reasoning behind designing Starship to land upright. It doesn't require landing gear and the turnaround is expected to be much faster. But I'm beginning to question that logic. I think the ...
4
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2answers
587 views

Does Starship reuse actually serve a purpose for Mars, or only LEO/Earth-to-Earth?

(In this question, Starship refers to the reusable 2nd stage, not the full stack w/ Super Heavy). I was thinking about it the other day, and I realized that I'm not sure a reusable Starship actually ...
15
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1answer
985 views

What is the value of the cross-track angle between the two designated CRS-4 first stage recovery zones?

For the SpaceX Falcon 9 launch on its Dragon/CRS-4 cargo delivery mission to the International Space Station, according to Spaceflight 101, two downrange safety zones have been identified: The SpX-...
24
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6answers
9k views

Isn't Starship way too big?

The Shuttle was designed with a huge payload of 20 tons. This was supposed to not be a problem since: the reusability would drive down costs until satellite operators dropped expensive space hardware ...
7
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1answer
380 views

How did the SpaceX come up with such a disruptive design in the Falcon 9?

Because of the answers to Why has a rocket system like Starship never been proposed before? , now I need to ask something I'd always taken for granted. If Falcon 9 wasn't revolutionary for technical ...
8
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2answers
1k views

What is the most expensive part of a rocket?

I want to say fuel is, but this Question Why isn't stainless steel used for rocket engines? has got me thinking about cost in the long run. What part commonly found on most rockets cost the most ...
9
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2answers
482 views

Does SpaceX recover and reuse tank pressurization helium?

Given that SpaceX have successfully landed several Falcon 9 boosters and that these vehicles use helium pressure-fed engines, when these vehicles land, their propellant tanks will presumably be mostly ...
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0answers
71 views

How does Starship/Superheavy system compare with the hypothetical successor of Soviet Energia/Buran system, “Uragan”?

The both were meant to be fully reusable and have comparable scale.
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0answers
94 views

How much cheaper are pressure fed engines compared to other cycles (e.g. staged combustion, gas generator, electric pump-fed)?

It's well known that pressure fed engines are mechanically simpler, and therefore cheaper than pump-fed cycles (although pressure fed has worse performance). However, I haven't found any sources that ...
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3answers
464 views

Are SpaceX competitors planning to create reusable vehicles

Although I know programs and visions of many space companies, I'd like to ask, does anybody knows if there is any competitor to SpaceX that wants to create a reusable rocket in the future? Let's ...
66
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9answers
38k views

Why would SpaceX not use parachutes for the final descent of the first stage?

According to what I've read, SpaceX tried to use parachutes to recover the first stage of the Falcon 9, but it did not survive reentry. Now they plan to use 2 separate rocket burns to land: Reentry ...
4
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4answers
337 views

How would the US military switch to re-usable rockets?

The Ars Technica article After 25 years, military told to move from “expendable” to “reusable” rockets gives me pause. The military rockets I'm aware of generally explode at end of mission by design (...
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4answers
4k views

SpaceX first stage landing: Why not use an elevated net above the landing platform to catch the rocket?

The rocket would keep same descent system as now (no parachute). But instead of landing on feet, it would have long grid fins on its top that would be catched by an elevated cable net. The previous ...
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1answer
433 views

How were STS SRBs disassembled

What was the process for disassembling the SRBs following their recovery? Was it broken down to the field or factory seal level of segments, and how was it taken apart?
7
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1answer
1k views

Was Sea Dragon second stage reusability ever plausible?

Many websites consistently claim that the first stage of the enormous Sea Dragon rocket was intended to be reusable. While recovering a giant booster from sea after a splashdown may seem tricky, it ...
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1answer
147 views

How long is Falcon 9 suicide burn?

My question is How long is a Falcon 9 suicide burn? I assume the answer might vary between rides, depending on the payload lifted and its destination orbit so the time might not be the same for a ...
3
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1answer
146 views

What's the benefit of making boosters land nicely (SpaceX) instead of parachuting them at sea (Space Shuttle) [duplicate]

SpaceX boosters return by landing nicely thanks to an elaborate guiding system. This requires, well, a guiding system (so, more electronics, more opportunities for failure and massive engineering ...
4
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1answer
221 views

Starship deceleration during belly flop?

Was just wondering what level of deceleration did they get during that belly flop manouver? Updated: Hiya, you're all correct, and I was a tad vague in my question! What I'm after is the vertical ...
2
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1answer
62 views

Will there be any additional benefits of reusability for the space tug?

We are now seeing certain advantages of the reusable use of different rocket stages. Decrease in price (perhaps not so much yet), increase in launch reliability, etc. Are there any other benefits of ...
2
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1answer
100 views

Does Falcon 9 perform static fires before every launch?

Before launching every Falcon 9 rocket, is SpaceX performing a Wet Dress Rehearshal (WDR) and a static fire? If not before every launch then is it doing it before every first launch of a new booster? ...
6
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1answer
233 views

Which RS-25s are on the Artemis 1 rocket?

The SLS core to be used for the Artemis 1 flight will use four RS-25 engines. These reusable engines were used on the Space Shuttle Orbiter previously. Is there a listing of which SSMEs are planned ...
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4answers
780 views

Why do all recent proposed lunar landers have payloads on top?

Every recently-proposed vacuum lander I've seen has its payload as far off the ground as possible. This necessitates cranes, ladders, and elevators to get things down. (Starship may be a partial ...
4
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1answer
79 views

Does the SpaceX Falcon 9 first stage fleet, fly in order?

SpaceX by the end of 2020, made it very clear that they have solved the first stage reflight problem. Two cores have flown 7 times. Several are over 4 flights. At the beginning of 2021 they have about ...
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4answers
3k views

Are SpaceX Falcon rocket boosters significantly cheaper to operate than traditional expendable boosters?

The title pretty much sums it all up. I remember somebody once remarked about the space shuttle program that “the space shuttle was originally designed to be a space truck. But the shuttle is to ...
5
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1answer
302 views

Are LiPo batteries more suitable for 1st stage electric power than Li-ion batteries?

I've just ran across two mentions in Scott Manley's videos of LiPo batteries (Lithium-polymer) in first stage launch applications. These involve power levels of megawatts. Why The Electron Rocket May ...
7
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1answer
635 views

how much reusable are electric pump fed rocket engines like Rutherford Engines of Electron rocket?

In electric pump fed rocket engines, propellants are pumped by two electric motors. So there is just one combustion chamber and that is the main combustion chamber. I guess electric pumps are fairly ...
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1answer
95 views

Why isn't the engine's Case-Throat-Nozzle reusable in Virgin Galactic's SpaceShipTwo?

I raed on https://www.smithsonianmag.com/smithsonian-institution/engine-powering-future-civilian-spaceflight-enters-collections-180971493/ (mirror): RocketMotorTwo is a hybrid rocket motor that ...
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0answers
87 views

Was the Martin Spacemaster a feasible design for a fully reusable launch system?

The first time I saw this design was in this post and I was intrigued. The Martin Spacemaster from ~1970. What a cool design! Lots of SSME's, fully reusable, asymmetrical cockpit, and air breathing ...
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0answers
74 views

Which components are non-reusable after a sub-orbital spaceflight with Virgin Galactic?

I wonder which components are non-reusable after a sub-orbital spaceflight with Virgin Galactic. What I have found so far: https://www.virgingalactic.com/learn/ (mirror): With the exception of the ...
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0answers
92 views

Does Falcon-9's second stage “blow” into the first stage's top intentionally? [duplicate]

Every time I watch Falcon-9 moments like that at , I wonder: Is it really intentional that the main engine of stage 2 after startup blows directly into stage 1´s top, ...
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1answer
2k views

Is Falcon 9 repainted before reuse?

Before reusing the first stage of Falcon 9, is it repainted? If yes then why?
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0answers
145 views

Would the lunar rovers work (again) today? What would be needed? [duplicate]

3 Apollo missions brought their lunar rovers (Lunar Roving Vehicle) LRV with them, and they remained on the moon. Some of them have broken parts, and their batteries seem to be emtpy, according to ...
14
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1answer
1k views

Could an EVA Suit meant for Mars be used for EVA on another celestial, or vice-versa?

A quick follow-up to What is the power requirement of a spacesuit? The Apollo 11 crew were in a vacuum out on Luna; their space-suits fulfilled the purpose of a basic space-suit about which Wikipedia ...
3
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1answer
138 views

Are any parts of Sokol suits re-used?

The Sokol spacesuit is the Russian launch and re-entry suit. They appear to be custom-made for each cosmonaut, with mission patches and nametags sewn on to the suit. Even if the suit as a whole is ...
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0answers
219 views

Will SpaceX paint over the NASA Worm on booster 1058 for its next flight?

For the Dragon Crew mission SpaceX flew a brand new booster (how declasse) B1058 and painted it with the old style NASA Worm logo. SpaceX owns the booster and is most likely to fly it many more times ...
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1answer
100 views

Falcon 9 landing stages

I know the first stage of Falcon 9 separates at about 2:30 min and it lands at about 8:30 min But what are the distinct stages of the descent? Like deorbit burns, grid fin deployment, leg deployment ...
1
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1answer
85 views

How long it takes for the Falcon 9 payload fairings to reach the sea?

The payload fairings of Falcon 9 are released at about 3:15 min How much time they need to fall and reach the sea? And what is their maximum speed while reentry?
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0answers
172 views

Shuttle main engines RS-25 refurbishment/material damage

There was some thread here on Space Stack-Exchange about RS-25 refurbishment, but I am interested now, how this refurbishment look from the point of material damage of SSME hardware. In the early ...
2
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0answers
57 views

Shuttle main engines RS-25, material damage on parts that needed replacement/refurbishment

Since other members wrote, that my my original question here Shuttle main engines RS-25 refurbishment/material damage was too broad I modified it to asked just one thing, while the other questions I ...
2
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1answer
240 views

Most challenging aspects of a reusable satellite scheme like this?

What would be the most challenging aspects of a reusable satellite scheme similar to the one shown in this video? For the kilo-constellations (e.g. SpaceX's StarLink with 4,500 to 7,500 satellites) ...
3
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1answer
134 views

Does RUAG Space recover and reuse Ariane 5 and Atlas V payload fairings after splashdown?

RUAG Space is the company that manufactures payload fairings for the Ariane, Vega, Atlas V (500 series) and the upcoming Vulcan. Back when Spacex started trying to catch the fairing without it hitting ...
8
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1answer
284 views

How much of the recovery system does Spacex remove from a Falcon 9 when using it in an expended manner?

Falcon 9s have a limit to how many times they can be reused, and, for the last flight of a booster they don't make it land (in one piece), and instead use all the fuel to help the payload. That way ...
10
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1answer
965 views

Final results on Space Shuttle SRB reuse goal?

One of the stated goals of the Space Shuttle solid rocket boosters (SRBs) was their re-usability and cost savings from such reuse. I know that many of them were reused, but in the end, how successful ...
9
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2answers
2k views

What happens to payload fairings of GEO launches?

Say you launch a satellite into GEO using Falcon9 The 1st stage returns The 2nd stage is moved into graveyard orbit. But what happens to the payload fairings?
3
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1answer
112 views

How many times can Falcon 9's payload fairings be reused?

Falcon 9's first stage can be reused 10 times or even 100 times. But how about its payload fairings?
3
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2answers
604 views

Did SpaceX ever reuse payload fairings?

Did they ever reuse the payload fairings of the Falcon 9? There are a few related questions about maximum reuses and fastest refurbishment that might be asked later I guess
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1answer
69 views

Plasma magnet drive for reusing stages

From what I understand, one of the reasons why it's impractical to recover upper stages of rockets is that they're traveling at high speeds, and methods of making them bleed off that speed (such as ...
5
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1answer
78 views

Does a published account of the economics of Russian debris shipbreaking exist?

Most Soviet and Russian rockets are/were launched from an inland site, and spent booster stages crash on the ground in sparsely populated (and frequently impoverished) rural areas. Since the fall of ...

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