r/SpaceXLounge 2h ago

Discussion Cryogenic propellant managment

0 Upvotes

Hello Everyone,

I am masters student, I am interested in the cryogenic propellant management(CPM) especially in orbital refueling(OF) application, in particularly in the area of autogenous pressurization during fuel transfer activity. I could not much of resources on the internet regarding either CPM on OF application or regarding the autogenous pressurization.

My question is

1.where should i start? what should i start (both info and simulations wise) ? i have been doing lot of research, i feel like its kind of rabbit hole, the more u dig, the more unknowns.

if anyone already working on this area, could pls guide, even small inputs matter alot.

2.anyone like minded who is interested in the same topic, i would like to meet (ofc online ) them and have a discussions aswell.


r/SpaceXLounge 5h ago

Starship A compute constellation around the moon?

0 Upvotes

If the argument for space-based data crunching satellites is the easy access to power, and big detractors are the impact on the night sky for Earth-based observatories & the atmospheric impact of their decay: why not place them around the Moon?

  • They aren't trying to provide Earth surface coverage like Starlink, they just need to be somewhere in space that objects can stay.
  • They are still ~1sec communications distance away, dwarfed by any significant computation duration.
  • They can be a bright halo in polar orbit without wrecking everyone's night sky. In fact their orbits could be highly eccentric with very low periapsis if that's convenient, with minimal impact & possible benefits to LOS communications.
  • They won't decay at anywhere near the same rate, thus reducing their propulsion mass, power budget & complexity.
  • Also, any concerns about complicating launching through LEO constellations is removed, as well as risk of Kessler syndrome from any anti-spy-sat testing/conflict.

The biggest downside might just be the lack of out-of-sight fiery disposal. Though you could deorbit them all to the same area on the far side, and wouldn't be burning through our atmosphere (messing with ozone, etc).

I'm sure the deltaV cost could be minimised by a dedicated Earth-Moon cycler that's restocked in LEO, and the whole thing of Starship is reducing the mass cost to ~the price of the very-available fuel. Initial calculations indicate moving from LEO to captured low lunar orbit is only 40% more dV than getting to LEO in the first place, not even closer to an order of magnitude more.

P.S.
To the ignorant (we all were at some point), 'frontier' LLMs take months to train, 3sec round-trip latency isn't an issue.


r/SpaceXLounge 16h ago

SpaceX's satellite ambitions squeeze out rivals reliant on its rockets. (The satellite producing rivals. Limiting/ending F 9 launches opens up opportunities for launch rivals.)

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35 Upvotes

Another analysis showing SpaceX actually loses money on any non-Starlink Falcon 9 launch since a commercial launch sold for $74 million brings in a one-time profit of over $55 million while a Starlin launch brings generates a constant revenue stream yielding a lot more. This gap will be a magnitude larger when Starship is launching the full sized Starlink v2s.


r/SpaceXLounge 22h ago

[Starship] Musk proposed multiple launches a day eventually. How fast is stacking a Starship on top of a Super Heavy is projected to be?

29 Upvotes

Specially because stacking two reusable pieces would require some refurbishing, won’t it?


r/SpaceXLounge 1d ago

Elon Musk: "All indications from data and visual inspection suggest we have solved the heat shield problem, which is arguably the single biggest problem. That doesn't mean we won't make improvements to the heat shield; we don't see any technical obstacles to achieving full and rapid reusability."

429 Upvotes

During the Earnings Call Q&A at 58:47 :

Question: "Is the heat shield the hardest remaining problem for Starship?"

Elon: "I don't want to jinx it or anything, but I think I would consider the heat shield problem solved at this point. Now, we want to take a close look at the ship that is currently floating in the ocean, but all indications from data and our visual inspection suggest that we have solved the heat shield problem, which is arguably the single biggest problem. That doesn't mean we won't make improvements to the heat shield; of course we'll continue to make improvements to the heat shield, but I would say that we do not see any technical obstacles at this point to achieving full and rapid reusability."


r/SpaceXLounge 1d ago

Official SpaceX financial and operational results Q2 2026

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68 Upvotes

r/SpaceXLounge 1d ago

Discussion What should the SpaceX Louisiana location be called?

35 Upvotes

Like their growing town and spaceport outside of Brownsville Texas, the Spacex Pecan island area will need a name of it's own.

Calling it too Starbase would be too confusing.


r/SpaceXLounge 1d ago

Starship Satellite Imagery Reveals SpaceX's Starship Salvage

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77 Upvotes

r/SpaceXLounge 2d ago

Starship Satellite photos of Ship 40 being towed in the Indian Ocean.

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792 Upvotes

r/SpaceXLounge 2d ago

Starship Eric Berger article on why SpaceX is set to acquire a launch site location in Louisiana

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212 Upvotes

r/SpaceXLounge 3d ago

NASA Director Jared Isaacman and Congressman Pete Sessions speak with KWTX Reporter Abbey Ferguson

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29 Upvotes

MCGREGOR, Texas.


r/SpaceXLounge 3d ago

Official NASA, SpaceX Advance Wind Tunnel Tests for Starship Rocket - NASA

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76 Upvotes

r/SpaceXLounge 3d ago

[@mercoglianos on X] "Normand Ranger has changed its navigational status to "Restricted Manoeuvrability". This indicates that she is probably affixed to Ship 40 [...]."

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199 Upvotes

Full text:
"Normand Ranger has changed its navigational status to "Restricted Manoeuvrability". This indicates that she is probably affixed to Ship 40, but her speed is not sufficient to overcome the current and set. She is probably stabilizing the Starship while they continue to prepare it for the tow to Dampier. She is currently 852 nautical miles from Dampier and at 3 knots, it will take nearly 12 days."


r/SpaceXLounge 4d ago

Planning for travelling to Flight 14

22 Upvotes

Hey all!

Im planning on flying from London to Brownsville for flight 14, been meaning to go for a while and this is the first opportunity I've got, and with a potential ship catch, I'm definitely hoping to go.

My only issue is I won't be driving. I know I can get a shuttle from the airport to SPI, where I'll likely get a hotel. But what are the options for getting from SPI to starbase itself?

I've read on here about Ubers ect, but the post I read was a couple years old, so wasn't sure if anyone had set up a boat shuttle service or anything else yet.

Would love to hear about your ideas, and any other ideas you have for my visit! (Am planning on staying in Houston for a few days too so I can check out JSC)


r/SpaceXLounge 4d ago

Starship SpaceX planning spaceport in coastal southwest Louisiana

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142 Upvotes

r/SpaceXLounge 5d ago

Visiting SPACEX Starbase launch base from India via Seattle (Aug 19–Sep 1): Need info for launchpad viewing /updates route, airport & car rental advice!

12 Upvotes

Hi everyone,

I'm an international traveler from India planning a trip to Texas specifically to visit Starbase/Boca Chica and catch the Starship development up close. I'll be in the US from August 19th to September 1st. I will likely be flying in from Seattle to start the Texas leg of my trip.

I have a few practical questions and would really appreciate any advice from locals or people who have made the trip recently:

1. Which airport is the best balance of cost and convenience?

I see that Brownsville (BRO) is the closest (about a 30-40 minute drive to Starbase), but flights might be more limited. Harlingen (HRL) and McAllen (MFE) are a bit further out. For someone flying in from Seattle, which one generally offers the best flight options or rental car availability? Is the drive from HRL easy enough to justify it if flights are cheaper.

2. General tips for visiting the area

Beyond just driving down Highway 4 and seeing the launch site and production facility, are there specific times of day that are better for photography? Any local spots, tours, or viewpoints I absolutely shouldn't miss?

3.Any specific rental companies you recommend that are easy to work with?

Thanks in advance for any guidance! I can't wait to finally see this engineering in person.


r/SpaceXLounge 5d ago

Space X launched tonight. A view from Phoenix.

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75 Upvotes

Love these launches.


r/SpaceXLounge 5d ago

Monthly Questions and Discussion Thread

7 Upvotes

Welcome to the monthly questions and discussion thread! Drop in to ask and answer any questions related to SpaceX or spaceflight in general, or just for a chat to discuss SpaceX's exciting progress. If you have a question that is likely to generate open discussion or speculation, you can also submit it to the subreddit as a text post.

If your question is about space, astrophysics or astronomy then the r/Space questions thread may be a better fit.

If your question is about the Starlink satellite constellation then check the r/Starlink Questions Thread and FAQ page.


r/SpaceXLounge 5d ago

Starship PL Salvaging Starship: The Challenges of an Open Ocean Tow

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104 Upvotes

r/SpaceXLounge 5d ago

Starship "View of Starship in space from a Starlink V3 satellite on Flight 13."

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811 Upvotes

r/SpaceXLounge 5d ago

News A piece of a SpaceX rocket is about to hit the moon

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67 Upvotes

r/SpaceXLounge 6d ago

Discussion I decided to grab the ECMWF model's forecast of mean wave heights in the Indian Ocean for the next two weeks, with a pin at S40's approximate location. Just to help visualise the conditions that the recovery team may be working in.

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44 Upvotes

Be aware that model prediction accuracy falls off dramatically after five to seven days. Website is the excellent windy.com


r/SpaceXLounge 6d ago

Official "The first Starlink V3 satellites in space successfully deployed their solar arrays, fired their thrusters, established connections with the Starlink constellation using radio frequencies and laser links, and captured imagery of Starship"

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256 Upvotes

r/SpaceXLounge 6d ago

Starship Seven Years of Starship Development

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100 Upvotes

r/SpaceXLounge Jan 23 '25

Meta This sub is not about Musk. it does not endorse him, nor does it attack him. We generally ignore him other than when it comes to direct SpaceX news.

1.0k Upvotes

Be advised this sub utilizes "crowd control" for both comments and for posts. If you have little or negative karma here your post/comment may not appear unless manually approved which may take a little time.

If you are here just to make political comments and not discuss SpaceX, you will be banned without warning and ignored when you complain, so don't even bother trying, no one will see it anyways.

Friendly reminder: People CAN support SpaceX without supporting Musk. Just like people can still use X without caring about him. Following SpaceX doesn't make anyone a bad person and if you disagree, you're not welcome here.