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Questions regarding SpaceX's Starship, formerly the Big Falcon Rocket (BFR) upper stage or BFS
1
vote
2
answers
450
views
How precise does Super Heavy's tower landing have to be?
What is the position and velocity range it needs to fit in, to be safely caught by the Orbital Launch Mount?
3
votes
2
answers
843
views
What are these composite overwrapped pressure vessels on Super Heavy?
https://en.wikipedia.org/wiki/SpaceX_Super_Heavy
The oxygen tank has four chines attached. These protect the various COPVs on board, as well as providing lift during flight.
First I've heard of thes …
-2
votes
1
answer
88
views
How much propellent is vaporized to pressurize the Starship and Super Heavy tanks?
We know they use autogenous pressurization. But how much methane and oxygen is vaporised to do this? I would like a figure for each of the 8 individual tanks in the stack.
TBH I'm trying to figure out …
3
votes
1
answer
181
views
Why does an expendable Starship launch cost only $100 million?
Even the Falcon Heavy with a third the payload costs $150 million. And yet we have Payload Research saying that an expendable Starship launch costs less?
5
votes
3
answers
242
views
Has IFT-4 demonstrated that Starship is ready to enter service?
IFT-4 demonstrated a controlled entry into orbit. IFT-3 had already demonstrated the ability to open the payload bay door (or so SpaceX claims). Is there any reason why Starship cannot begin launching …
-1
votes
1
answer
109
views
How much energy is used for a Starship launch? [duplicate]
I want to understand how Earth will support the thousands of Starships Musk envisions.
I'm talking about the energy expended in all launch-related processes: propellant generation, transportation, del …
7
votes
1
answer
977
views
Starship IFT-4: whatever happened to the fin tip camera feed?
During reentry, there were two camera views. The view that looked at one of the flap hinges wound up getting ruined when the hinge failed, because debris and heat ruined the lens. But they never switc …
-1
votes
1
answer
176
views
Why will SpaceX fly a Block 1 ship on IFT-6? [duplicate]
While writing this question, I was directed to the question Why doesn't SpaceX plan on doing anything new on IFT-6? The top answer basically says it's because Block 2 is totally different.
They now ha …
1
vote
0
answers
157
views
What if the Starship fins were fixed?
The body flaps on Starship have the responsibilty of controlling attitude during atmospheric flight. They are also needed to deal with the large moments created by carrying payloads in the nose.
Movab …
0
votes
1
answer
165
views
SpaceX Raptor Vs Raptor Boost
I'm asking all these questions as one because I don't think they're worth cluttering the site separately for.
How much does Raptor Boost weigh compared to normal Raptor?
How much more thrust does Ra …
1
vote
0
answers
104
views
Is Starship monocoqué?
Does Starship have any internal bracing to support it? Or is it a "balloon tank" relying on tank pressure to stand?
10
votes
2
answers
2k
views
Starship IFT-3: Plasma appears, then disappears
How is that possible? It's not like it lost velocity or gained altitude in that time period.
0
votes
1
answer
155
views
Where are the Raptor Boost engines on Super Heavy?
SpaceX Super Heavy has two types of Raptor, one of them being Raptor Boost, which has no gimbals and limited throttling but increased thrust.
But I can't find information on Wikipedia on how many ther …
8
votes
1
answer
608
views
How are engines numbered on Starship and Super Heavy?
I was watching this video summarizing Elon Musk's recent remarks on the orbital test flight, and they mention specific engines. But unless a named engine shuts down and is shown on the small display i …
18
votes
3
answers
4k
views
On April 20 2023, how did Super Heavy burn for 40% longer than planned?
The launch profile as planned had the booster shutting down at 169 seconds.
In the event, it burned for 239s, or more than 40% longer. We know that the booster lost 5-7 engines during the flight, acco …