Questions tagged [spacex]

Space Exploration Technologies Corporation, or SpaceX, is a private space exploration company. It was the world's first privately held company to successfully launch a cargo mission into space and a crewed mission into orbit. See wiki for related tags.

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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 ...
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Do Falcon 9 grid fins lock up during reentry?

Do Falcon 9 grid fins lock up when extended during reentry? Or do they rely on aerodynamic forces to keep them extended once they're deployed? Could the fins flail down during the reentry burn when ...
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How big are the risks of Starship flipping during or after landing on the Moon?

Now that NASA has announced the selection of SpaceX to manufacture the Moon landing vehicle(s) for the Artemis program, I can't but notice how tall Starship is when compared to other concepts. Chances ...
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Minimum reentry velocity ideal for a spacecraft returning to Earth

During the return trip from Mars or Moon, SpaceX starship can refuel it's propellant tanks before reentry. It can use these propellants for reverse thrust to bring the spacecraft velocity to near idle ...
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How problematic is debris for Starship storage/depots?

So with the recent announcement that Starship has been selected as NASA's HLS (which is pretty radical), it's raised a question in me that been around for a while. For HLS; a Starship storage(depot) ...
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Evacuating the ISS but wait, there's only one Spacecraft?

I was doing some research regarding the Soyuz as I'm currently planning a summer project in which I would build a close replica of a Soyuz when the question popped into my mind, "What would ...
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Should the SpaceX Starship static fire tests more closely match actual flight parameters?

Under the current 10 km flight program, all 3 Raptors are used at launch. During the ascent, they shut down one at a time. After a flop and free fall of several minutes, they are reignited, with the ...
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Is Starship planned to fly directly to the ISS without first stage? Is it even possible?

I'm having difficulty understanding how/if Starship and/or Super Heavy could be used to deliver crew to LEO. Is it expected to deliver astronauts to the ISS Crew-Dragon-style, but without the 2nd ...
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Are the engines present on the SpaceX Starship Sea level engines or Vacuum engines?

The SpaceX Starship will have engines that light up in space and propel the ship to Mars. Companies and organizations use vacuum engines in space. However, Starship has to land on Mars, travel back ...
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Why SpaceX is keeping it's space industry policy transparent?

SpaceX has many global competitors, both private and government funded, in the space industry. But it is following a very transparent approach during the construction and testing phases. What possibly ...
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How much does the SpaceX Starship flex during the Flop maneuver?

Poring over the woes (and sucesses) of Starship prototypes SN 5-11, I had read they were trying a thinner stainless steel skin in later iterations. The flop maneuver places the centers of drag at the ...
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SN11 was launched in fog. Why not wait for better conditions?

The fog certainly frustrated the external observers, but it doesn't seem ideal from SpaceX perspective either. All the external observers were very distant from the launch/landing site and would be ...
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Why have SpaceX skipped the SpaceX Starship SN12, SN13, and SN14?

Something has happened to the SpaceX Starship SN11. (For full details and answers regarding SN11, check out the question What happened to the SpaceX Starship SN11?) Elon Musk recently posted this ...
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What happened to the SpaceX Starship SN11? Why did it crash?

What happened to the SpaceX Starship SN11? As per the live streams held on YouTube, I want to know what really happened to SpaceX Starship SN11 The live streams show a lot of smoke and others show ...
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Could another fuel be used in the SpaceX Starship header tank?

A memory of hexane and water in a separatory funnel brought to mind the issue of helium and LNG in the header tank while the Starship flips and does its powered landing. There was discussion of the ...
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Doesn't dirt get into critical Starship parts?

I guess that once Starship prototypes are complete they should be pretty weather- and dirt-proof. They should be perfectly sealed and stainless steel is well-suited to life outside (though sometimes I ...
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How does the economics of orbital refueling vs bigger rocket work?

SpaceX plans to refuel Starship in orbit for Moon and Mars missions. According to some other questions here, it seems like they would need 6 tanker Starships to send 1 Starship to Mars. At a glance, a ...
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Flying saucer shape rocket vs cylindrical shape rocket

Here's my hypothesis- Cylinder shaped large rocket is not suitable for vertical landing due to its high center of mass and bulky weight. However an equally weighing saucer shape rocket has more ...
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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 ...
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How can NASA be prevented from becoming too dependent on one rocket company or vice versa?

Wouldn't it be an unhealthy situation if NASA were to become too dependent on one company, for instance the only one that could launch heavy rockets ? And also, if a private rocket company's existence ...
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SpaceX launch simulation software?

Say you're a SpaceX launch engineer. You have a mission design meeting where you'll talk about different mission scenarios. The meeting is in a few hours. Would you run a quick simulation in KSP to ...
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What is super heavy booster? What will it be used for?

Also called BN1, right? Please explain me what is booster and what will it be used for? Also feel free to give me additional insights other than included in my question about BN1.
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Static Fire Tests: How is the rocket prevented from flying?

In rockets like Starship, if 35 Raptors are firing at same time, then in a full-duration static fire test there would be enormous loads being exerted from 35 raptors, on the clamps holding the rocket. ...
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Why do SpaceX Starships look so “homemade”?

Maybe this is not possible to answer, but I was hoping there was some reliable information available on this. It seems to me that the SpaceX Starship rockets have sort of a homemade quality to them, ...
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What is a static fire test?

I watched SN10 launching but not the static fire test. I am closely following SN11 launching, and read about a static fire test today. I don't know what it is. Can someone please explain "static ...
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What is this line, what is it called, what is the reason behind it?

I started following SpaceX recently. I used to read the updates but now I am diving deeper to learn new things. SpaceX is fascinating and I really like everything about it. But I have question, I don'...
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Can someone explain the SN10 landing failure in layperson's terms?

The things I can't understand from what Elon tweeted are: "engine was low on thrust due (probably) to partial helium ingestion" There are only tanks for liquid oxygen and CH4 - where did ...
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What will be the final Starship prototype?

So far, Spacex has made and destroyed/launched Starhopper,MK1-MK4, and SN1-SN10. They also have SN11 on the launchpad and BN1,BN2, and SN15-SN20 under construction. What will be the final Starship ...
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Will the Starship skirt envelope heat during landing?

Starship lands on the pad using the landing burn of 1-2 raptor engines. The landing legs offer little vertical clearance from the ground, whereas during lift off, the suborbital launch pad provides ...
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Will i be able to see the SpaceX tonight launch from Ocala, Fl?

Im currently in Ocala, FL and SpaceX launches a rocket tonight (March 9th) from Cape Canaveral. Will I be able to see it given the proper conditions?
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Why SpaceX want to land the rocket on the ground?

click for full size Won't it be easier and save a lot of money to just catch it or land it in a basket? So rocket coming down can open arm longer than the diameter of the high basket where it goes ...
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Why did SN10 rest at a slight incline after landing? [duplicate]

Recently when SpaceX's SN10 landed, before it exploded, it sat still on the ground for a few minutes. It appears to be resting at a slight incline. Why is this?
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Why was the SpaceX Starship SN10 slanted when it landed?

Why was the SpaceX Starship SN10 slanted when it landed? Was the landing pad uneven? Or did the Starship land a little way away from it? Or was this caused due to hull damage?
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Does the SpaceX Starship plan to have landing legs?

Does the SpaceX Starship plan to have landing legs? And if so, how many and where will they be located on the body of the rocket?
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Trying to calculate Starship's ability to escape earth gravitational potential

The Wikipedia had the spectrum of SpaceX Raptor's specific impulse to be 330s at sea level and 380 in vacuum. Using an updated effective exhaust velocity at sea level to = 3280 m/s and in the vacuum ...
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Why did the SpaceX Starship SN10 explode?

Much to everyone's relief. The SpaceX Starship SN10 successfully completed its flight and landed..... But, sometime later, It exploded! Why? And did it have anything to do with the fire near the ...
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Why might particulate matter be shaken loose during Crew Dragon Demo-1 launch?

Here is the picture of Expedition 58 crew members enter the Dragon 2 of Crew Dragon Demo-1 for the first time. They are wearing protective gear to avoid breathing particulate matter that may have ...
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Did improper *Aerodynamic inputs* contribute to the SN 9 RUD?

Reviewing the last few seconds of the SN 9 flight revealed an unrecoverable over-rotation which the gimballing of the lone functioning rocket engine could not compensate for. The "flip" ...
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If we used Hubble, or the James Webb Space Telescope, how good image could we get of the Starman?

I know that this is never going to happen, because those telescopes have much more important things to look for ... But I was just wondering if we still did it, what would the best result look like? ...
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Can you Hoverslam without going vertical?

Problem of the day, that pesky Starship Hoverslam. Imagining a crazy (childish) contest to see who could flip at the lowest altitude and brake to 0 rate of descent and land, it was (hilariously) ...
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If a company/agency has already developed a kerolox/hydrolox rocket, is it wise for them to switch to an all-methalox rocket? (to lower costs)

Multiple rockets, such as the Atlas V or Saturn V, have used the combination of a kerosene/liquid oxygen (kerolox) lower stage for higher density and thrust within the atmosphere and a liquid hydrogen/...
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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 ...
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Could a jet style flame holder help a Raptor relight during its landing manuver?

After reviewing the split second ignition of the 3 Starship SN 9 Raptor engines on their successful liftoff and ascent on video, thoughts began to focus on their relight issues during the "seven ...
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Spacecraft that can be used for microgravity missions and experiments

Do you know any of spacecraft that can be used for microgravity missions and experiments? Nowadays it`s rather popular and useful to use uncrewed guided space vehicles for particular microgravity ...
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What local pressure changes would a starship launch on Mars cause?

When Starship launches from Mars it will burn thousands of tonnes of fuel in seconds. This will cause a local increase in pressure, humidity (it might exist!) and temperature. Do we have any idea how ...
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What is this ring-shaped part falling from Starship SN9 after launch?

The picture shown is a screenshot during the recent launch of SpaceX's SN9 from a live stream, and I noticed that a black ring fell off the exhaust/engine. It only shows up for around a frame or two ...
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SpaceX Starship: Could they use the Vacuum engines during landing in case of other engine failure?

With the recent test (and RUD due to single engine relight failure) of SN-9, Musk has stated that what they should've done was light all three raptor engines simultaneously then turn one off so as to ...
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Why does starship flip vertical at the last moment instead of earlier

In the test flight of SN9, it appeared that 1 of 2 engines did not relight upon landing. Why is the transition to vertical not done at a higher altitude where a backup engine could be lit if needed ...
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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 ...
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Which US Air Force career should I be in for the best chances at becoming some sort of electrical engineer at SpaceX? [closed]

I flunked in high school and early college because I wasn't in the right mindset. No drive or motivation to do my best. I now want to pursue SpaceX's vision because it's similar to my vision, and I ...

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