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Questions tagged [sls]

The Space Launch System (SLS) is NASA's rocket replacement for the Space Shuttle for large payloads. Use for questions about the vehicle and the launching of any payloads.

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Escape system of SLS vs Ares I

One of the criticism directed at the Ares I rocket was the danger during a launch termination of the solid-propellant 1st stage. As far as I understood it, a terminated Titan IV solid-propellant ...
David-H-K's user avatar
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6 votes
0 answers
148 views

Why doesn’t the SLS have a service structure?

Both the Saturn V and the Shuttle had the Mobile Service Structure and the Rotating Service Structure respectively for work on the pad. Why doesn’t the SLS have such a thing?
BDA's user avatar
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6 votes
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What are these wires on the side of the SLS core stage?

I was reading about the SLS core being moved for testing and I noticed something odd on the core stage. There's several lines on the stage, which in closer inspection are wires. It's not obvious what ...
Machavity's user avatar
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6 votes
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262 views

Couldn't the shuttle orbiter be replaced with a cargo bay, instead of creating the SLS?

Are there any technical reasons for not simply continuing the space shuttle production, except for replacing the orbiter with a pretty simple cargo bay (a payload fairing)? Like the Russians planned ...
LocalFluff's user avatar
5 votes
0 answers
223 views

What are the arms for under the nozzle of NASA engine tests?

When NASA tests rocket engines at the Stennis Space Center, the engines have two arms under the nozzle. When the engines start these arms swing out of the way of the exhaust. What are these arms for? ...
Tom's user avatar
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4 votes
0 answers
154 views

Why does the ICPS carry extra hydrogen?

The Interim Cryogenic Propulsion Stage (ICPS) of the Space Launch System is essentially the Delta Cryogenic Second Stage (DCSS) lifted from the Delta IV rocket. However, among other minor changes, the ...
Andykins 's user avatar
4 votes
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116 views

Can Delta Heavy launch a fully fueled upper stage with no payload attached?

There is right now talk of a potential dual launch mission to fulfill EM-1, where a Delta Heavy would launch a fully fueled upper stage to LEO, to there bet met with the Orion spacecraft, likely ...
PearsonArtPhoto's user avatar
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4 votes
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733 views

If the J-2X is too powerful for SLS, why was it appropriate for Saturn V?

Reading an article about new engines for the SLS (Summary: There is no plan what to do once the current SSME's are expended), they mention that the J-2X is too powerful for the upper stage of SLS. ...
geoffc's user avatar
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3 votes
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199 views

From where will the planned Artemis I launch be visible?

The latest planned Artemis I launch window is 69 minutes long, opening 2022-11-14T00:07:00−05:00, which if used will lead to a launch in complete darkness. I'm interested in the possibility of ...
Will's user avatar
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3 votes
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Likely explanation for the bottom of the SLS rocket being covered with reflective silver "muffler" tape?

NASA.gov's First Artemis Rocket Stage Moved onto NASA Barge Ahead of Green Run contains a high resolution image of the rocket. The bottom end of the rocket's cylindrical shape is closed flat and ...
uhoh's user avatar
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3 votes
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What is holding SLS back from launching?

I'm kind of confused on this point SLS has engines, a tank, side rocket boosters, a capsule, and seemingly all of the pieces. What is the major technical issue right now that is keeping SLS from ...
PearsonArtPhoto's user avatar
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3 votes
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159 views

Why isn't the Europa mission more ambitious given the capacity of SLS?

SLS Block I will have about three and Block II five times more capacity in terms of payload mass to LEO, than any launcher which has been used for an interplanetary mission to date. But the mission ...
LocalFluff's user avatar
2 votes
0 answers
95 views

What is the scheduled launch date history for SLS EM-1?

The Falcon Heavy was famous for being "6 months away" for around 6 years, seen in this chart. How has the SLS maiden launch schedule changed since its first proposed date? P.S. If someone could ...
costrom's user avatar
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2 votes
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Energy use of Asteroid Redirect Robotic Mission (ARRM)?

In the ARRM feasibility Study Table 4, parameters of four different options (three different launchers and different trajectories) are gathered. What would be the total energy use of a mission like ...
Nina K's user avatar
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1 vote
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124 views

Are there any plans on replacing the shuttle-era RS-25D's during the Artemis III/IV missions?

The last two Artemis missions which use the shuttle-era RS-25D engines will fly in 2025 and 2026. Is there ever a possibility that, in the case that Aerojet Rocketdyne delivers their RS-25Es (or at ...
WarpPrime's user avatar
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