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Thread: SpaceX

  1. #5221
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    So, summarizing the tweetstorm...

    Raptor (sea level w/gimbal), RBoost (sea level w/o gimbal), and Raptor Vacuum (RVac) have been evolved/merged into,

    Raptor 2: 230 tonnes of thrust, either gimbaled or fixed.
    Raptor Vacuum (RVac): may or may not have a Raptor 2 core, TBD

    Super Heavy: 32-33 x Raptor 2, up to 7,600 tonne-force of thrust
    Starship: looking at 3 Raptor 2's, up to 6 RVacs

  2. #5222
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    Starship based space telescope?

    Saul Perlmutter = Lawrence Berkeley National Laboratory astrophysicist. 2011 Nobel in Physics, National Academy, etc. etc.

    Chris G - NSF @ChrisG_NSF
    Jul 7, 2021
    Replying to @elonmusk and @DJSnM
    Have you looked at a variant of Starship that is essentially the probe, too? Instead of paying to build two things, could a deep-space Starship incorporate those science instruments? Reduce cost even a little more for science missions?
    |
    Elon Musk ✓ @elonmusk
    Yeah, that would be cool. Also, using ship itself as structure for new giant telescope that’s >10X Hubble resolution. Was talking to Saul Perlmutter (who’s awesome) & he suggested wanting to do that.

    https://twitter.com/elonmusk/status/1412846722561105921

    Toby Li @tobyliiiiiiiiii
    Jul 7, 2021
    Replying to @elonmusk @ChrisG_NSF and @DJSnM
    Has SpaceX ever considered tethering two crew Starships to create artificial gravity enroute to Mars?
    |
    Elon Musk ✓ @elonmusk
    Yes

    https://twitter.com/elonmusk/status/1412864246719737856

  3. #5223
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    Quote Originally Posted by docmordrid View Post
    Wow...

    Elon Musk ✓@elonmusk
    Unfortunately, launch is called off for today, as an aircraft entered the “keep out zone”, which is unreasonably gigantic.

    There is simply no way that humanity can become a spacefaring civilization without major regulatory reform. The current regulatory system is broken.

    https://twitter.com/elonmusk/status/1409951549988782087
    Improved method of dealing with exclusion zones, according to FAA: https://phys.org/news/2021-07-faa-to...ons-space.html
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

  4. #5224
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    Quote Originally Posted by Noclevername View Post
    Improved method of dealing with exclusion zones, according to FAA: https://phys.org/news/2021-07-faa-to...ons-space.html
    Reading the link information
    During space operations, the FAA shuts down a huge section of airspace for hours in case the rocket or the space vehicle breaks apart. Airlines must reroute flights, which causes them to burn more fuel and fall behind schedule. A single launch can affect hundreds of flights.
    This was used for the launch for Transporter 2. I presume that it was in place for the scrubbed launch. The new equipment reduces the time the no fly area is active.
    The FAA said other changes it has already made have reduced airspace closures from an average of more than four hours to a little more than two hours for a launch. The agency said the Space Data Integrator will reduce that further, but didn't give a precise time.
    But an aircraft violated the area and scrubbed the launch. Musk related this in his tweet. Now the job is to have a smaller no fly area although there will be a fly through at some point in time, so I see no reference to reducing the area in the article. Bureaucracy in action. SpaceX will have to lobby to obtain a smaller area.

  5. #5225
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    See my earlier post on the topic. FAA have been tinkering with the "new" system for many years. It looks like the debacle with Transporter 2 was a trigger to actually start implementing it instead of staying in the development phase forever.
    With sufficient thrust, water towers fly just fine.

  6. #5226
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    That system started development in 2015/2016 with transponders on Cargo Dragon during CRS missions.

    SpaceX's new droneship A Shortfall of Gravitas (ASoG) is undergoing sea trials in the Gulf of Mexico, and...

    Michael Baylor @nextspaceflight
    Jul 9, 2021
    Replying to @elonmusk
    Will ASOG be fully automated? No tug boat required?
    |
    Elon Musk ✓ @elonmusk
    Yes

    https://twitter.com/elonmusk/status/1413624409848434689

  7. #5227
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    A Shortfall of Gravitas is a beast!

    (video tweet)
    https://twitter.com/elonmusk/status/1413598670331711493

  8. #5228
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    Quote Originally Posted by docmordrid View Post
    A Shortfall of Gravitas is a beast!

    (video tweet)
    https://twitter.com/elonmusk/status/1413598670331711493
    Well Musk is definitely going for the Bond villain aesthetic there, then again can you blame him?

  9. #5229
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    Screencaps

    For some reason I keep hearing The Imperial March...

    ASoG 1-1200.jpg

    ASoG 2-1200.jpg

    ASoG 3-1200.jpg

  10. #5230
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    Quote Originally Posted by docmordrid View Post
    A Shortfall of Gravitas is a beast!

    (video tweet)
    https://twitter.com/elonmusk/status/1413598670331711493
    Wow! Imagine automated fleets of them sailing round the seas landing (and launching?) P2P starships. They could presumably have helipads attached to enable passengers to be offloaded…

    Not necessarily something for the vaguely distant future.

  11. #5231
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    SpaceX

    (Double post deleted)
    Last edited by Extravoice; 2021-Jul-10 at 09:50 AM.
    I may have many faults, but being wrong ain't one of them. - Jimmy Hoffa

  12. #5232
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    Quote Originally Posted by docmordrid View Post
    For some reason I keep hearing The Imperial March...
    Are we sure that’s not a scene from the latest Bond movie?
    I may have many faults, but being wrong ain't one of them. - Jimmy Hoffa

  13. #5233
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    Super Heavy Booster 3 static fire next week

    No doubt, a partial engine set

    https://twitter.com/nextspaceflight/...63230157893636

  14. #5234
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    Sounds like Orbital Integration Tower #2 this year.

    https://twitter.com/cnunezimages/sta...44441035644930

  15. #5235
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    Whoa. Lots of Raptors, though they’ll need more:

    https://twitter.com/Erdayastronaut/s...06757042966531

    Musk also says they are starting a second Raptor factory. Makes sense, they need a lot of them for each Super Heavy, so will probably be a key constraint on construction time.

    https://twitter.com/elonmusk/status/1413909599711907845

    "The problem with quotes on the Internet is that it is hard to verify their authenticity." — Abraham Lincoln

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  16. #5236
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  17. #5237
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    Quote Originally Posted by Grashtel View Post
    Well Musk is definitely going for the Bond villain aesthetic there, then again can you blame him?
    I just Googled Elon Musk Villain Song. Cause you know, why not.
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

  18. #5238
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    Eric Berger @SciGuySpace (Are Technica)
    Jul 10, 2021
    So Texas is going to have an orbital launch site *and* a major rocket engine factory in addition to the Starship build site. This was hard to imagine even a few years ago.
    ||
    Elon Musk ✓ @elonmusk
    Replying to @Erdayastronaut
    We are breaking ground soon on a second Raptor factory at SpaceX Texas test site. This will focus on volume production of Raptor 2, while California factory will make Raptor Vacuum & new, experimental designs.

    |
    Elon Musk ✓ @elonmusk
    Yes. It will be the highest output & most advanced rocket engine factory in the world.


    https://twitter.com/elonmusk/status/1413935041332191233

  19. #5239
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    Quote Originally Posted by docmordrid View Post
    The mill that finished this lust be a hefty piece of equipment!
    With sufficient thrust, water towers fly just fine.

  20. #5240
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    Quote Originally Posted by Van Rijn View Post
    Whoa. Lots of Raptors, though they’ll need more:

    https://twitter.com/Erdayastronaut/s...06757042966531

    Musk also says they are starting a second Raptor factory. Makes sense, they need a lot of them for each Super Heavy, so will probably be a key constraint on construction time.

    https://twitter.com/elonmusk/status/1413909599711907845

    Adding to this, he also said that by high volume engine production, he means 2 to 4 raptor engines produced per day!

    https://twitter.com/elonmusk/status/1413910404246523906

    ’By “volume production”, I mean 2 to 4 engines per day. That’s super high volume for big rocket engines, but low volume by automotive standards.’

    That would be enough engines for a Super Heavy in weeks. I keep thinking of the new, not reusable SLS engines that are derived from the reusable shuttle main engines, the RS-25s. They will take much longer to build, and will cost $146 million each. Musk claims the raptors are less than a million each, but I’m sure he isn’t adding in startup and development costs. Still, a massive difference and the Raptors appear to have similar thrust to RS-25s, and are supposed to be at least as reusable as the originals (the originals were regularly run harder than they had been designed for, requiring refurbishment after each flight).

    "The problem with quotes on the Internet is that it is hard to verify their authenticity." — Abraham Lincoln

    I say there is an invisible elf in my backyard. How do you prove that I am wrong?

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  21. #5241
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    And still more. Asked how many Raptors he is aiming to produce:

    https://twitter.com/elonmusk/status/1413911893316603908

    Roughly 800 to 1000 per year. That’s about what’s needed over ten years to create the fleet to build a self-sustaining city on Mars. City itself probably takes roughly 20 years, so hopefully it is built by ~2050.

    Of course, we’ll have to wait and see. I’m not going to trust the Super Heavy to work well until I see it proven. I still think of the Soviet N-1, the moon rocket with many engines, though I know a big issue there was the primitive control system. Even that might have been eventually perfected if the USSR had continued to support development.

    And, there will need to be sufficient commercial and government interest for this to be realized, and before there are Mars cities, there would be big space hotels, lunar bases, and other things that have remained dreams and hopes for decades. But this is the only way I can see any of that having a chance of occurring.

    "The problem with quotes on the Internet is that it is hard to verify their authenticity." — Abraham Lincoln

    I say there is an invisible elf in my backyard. How do you prove that I am wrong?

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  22. #5242
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    Everything SpaceX @spacex360
    A second Raptor has arrived at the launch site ahead of installation onto Booster 3 (see far left)!

    https://twitter.com/spacex360/status...30795049013248
    Last edited by docmordrid; 2021-Jul-11 at 03:52 PM.

  23. #5243
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    https://blogs.nasa.gov/commercialcre...pace-research/

    NASA and SpaceX are targeting no earlier than Wednesday, July 21, for Crew Dragon Endeavour’s International Space Station port relocation operation. Kimbrough, McArthur, Hoshide Pesquet will suit up in their launch and entry spacesuits for Crew Dragon’s automated relocation maneuver from the forward to the space-facing port of the station’s Harmony module. The maneuver frees up the forward port to prepare for the arrival of NASA’s Boeing Orbital Flight Test-2 (OFT-2) mission at the microgravity laboratory at the end of July.

  24. #5244
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    Quote Originally Posted by Van Rijn View Post

    Roughly 800 to 1000 per year. That’s about what’s needed over ten years to create the fleet to build a self-sustaining city on Mars. City itself probably takes roughly 20 years, so hopefully it is built by ~2050.
    Interesting. Would be good to hear more about Musks's vision - and especially the potential timetable for generating substantial economic activity (resource extraction, manufacturing, growing food etc.) in the city on mars.

    This is a key element in shifting from a space future economy that is dominated by earth-moon system growth over the next 3-4 decades, to a more multi-modal space economy around earth, mars and the belt.

    There is so much uncertainty about how the space future will evolve over the next few decades. This is explored further here. It is not inevitable that economic activity in the mars system will grow to match that in earth-moon space. And, as Van Rijn says, this will be very dependent on sufficient government and commercial interest.

  25. #5245
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    Quote Originally Posted by DavidLondon View Post
    Interesting. Would be good to hear more about Musks's vision - and especially the potential timetable for generating substantial economic activity (resource extraction, manufacturing, growing food etc.) in the city on mars.

    This is a key element in shifting from a space future economy that is dominated by earth-moon system growth over the next 3-4 decades, to a more multi-modal space economy around earth, mars and the belt.

    There is so much uncertainty about how the space future will evolve over the next few decades. This is explored further here. It is not inevitable that economic activity in the mars system will grow to match that in earth-moon space. And, as Van Rijn says, this will be very dependent on sufficient government and commercial interest.
    Besides the ability to carry mass quantities of most anything propulsion needs to evolve from chemical to get higher thrust plasma & nuclear drives. There are two in development that sound interesting,

    1) the DARPA DRACO nuclear thermal rocket. The contracts went to General Atomics and Ultra Safe Nuclear Technologies (USNC-Tech), and Lockheed Martin & Blue Origin for test vehicle integration. USNC-Tech uses a high assay low enrichment uranium. Test flight 2025.

    2) a new plasma/plasmoid drive design,

    https://www.cambridge.org/core/servi...d-thruster.pdf

  26. #5246
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    Super Heavy engine count decided;

    33 with 230t of thrust

    https://twitter.com/elonmusk/status/1414284648641925124

  27. #5247
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    Elon Musk will ride Branson's SpaceshipTwo...

    https://twitter.com/RogerLewisHolt/s...505252355?s=19

  28. #5248
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    Some of today' headlines are hilarious/depressing: "Virgin beats SpaceX to space". How hard is it to inform yourself a bit so you know what is and is not going on.
    With sufficient thrust, water towers fly just fine.

  29. #5249
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    Quote Originally Posted by Nicolas View Post
    Some of today' headlines are hilarious/depressing: "Virgin beats SpaceX to space". How hard is it to inform yourself a bit so you know what is and is not going on.
    That makes no sense on several levels.
    At night the stars put on a show for free (Carole King)

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  30. #5250
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    Quote Originally Posted by Swift View Post
    That makes no sense on several levels.
    It’s just sooooo easy to confuse these space-faring billionaires.
    I may have many faults, but being wrong ain't one of them. - Jimmy Hoffa

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