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Thread: SpaceX

  1. #4801
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    Quote Originally Posted by cjameshuff View Post
    For the reentry burn, a higher throttle means decelerating at higher altitude and then accelerating more post-burn, a lower throttle means getting lower at high speed during the burn, but a lower altitude at end of burn and lower peak airspeed after the burn. Their grid fins seem to take the worst heating several seconds after the burn, and it seems like they'd try to reduce that. However, they also do the burn with 3 engines, so maybe they have some other reason to use higher thrust during the burn. (Exhaust heating from the burn itself being lower at higher altitude, maybe?)
    IIRC, grid fin heating was the reason SpaceX switched from aluminum to titanium for material-of-construction. I wonder if this change allowed them to tolerate more heating and thus change their deceleration profile for other reasons.
    At night the stars put on a show for free (Carole King)

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  2. #4802
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    Inspiration4

    NET September 15, 2021

    Crew Dragon's next crewed mission...

    https://twitter.com/inspiration4x/st...97947602034689

  3. #4803
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    ‘A bunch of people will probably die’: Elon Musk gets candid on Mars tourism in barefoot interview
    https://www.nzherald.co.nz/business/...VDVY2PFH7FDIM/

    Elon Musk wants SpaceX to reach Mars so humanity is not a 'single-planet species'
    https://www.cnbc.com/2021/04/23/elon...t-species.html

  4. #4804
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    Yesterday I heard 2 separate reports of space debris posing a threat to the launch. One report said that the debris missed by 28 miles, another said it missed by 100 feet. Anyone know the real story? Thx

  5. #4805
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    Quote Originally Posted by Spacedude View Post
    Yesterday I heard 2 separate reports of space debris posing a threat to the launch. One report said that the debris missed by 28 miles, another said it missed by 100 feet. Anyone know the real story? Thx
    About 1340 Eastern NASA alerted Crew-2 of possible debris impact and had them suit up in case of a collision. It ended up being further away than previously estimated so they un-suited and went to sleep.

    Approach, docking, and a portrait of other Visiting Vehicles (Crew-1 above, Soyuz below). Had to do some color correction & processing on the docked image.

    Screenshot_2021-04-24-07-25-39-464.jpeg

    Screenshot_2021-04-24-07-28-59-498.jpeg

    Screenshot_2021-04-24-07-32-23-996.jpeg

    Screenshot_2021-04-24-07-40-33-977.jpeg

    Screenshot_2021-04-24-07-41-53-524.jpeg

  6. #4806
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  7. #4807
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    SpaceX "Lone Star Minerals Development" subsidiary shipyard

    From the Port of Brownsville (Texas) minutes,

    https://www.portofbrownsville.com/wp...16-Minutes.pdf

    An 'authority to negotiate' for a site in the Port of Brownsville near the new connector road to Route 4 (leading to SpaceX's Boca Chica factory/launch site) was granted.

    SpaceX _Lone Star Minerals_ shipyard_2021-04-24-15-35-48-184.jpg

    This shipyard will, at the least, be used for building/modifying/outfitting ships, droneships, sea platforms, etc. for launch & landing, Point to Point Earth transportation, etc.

    Presumably they'll then be moved to new points of operation; US & the Americas, Asia, Europe, where ever.

  8. #4808
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    Monday looks like SN-15 static fire(s?) day

    1300 - 2100 US Eastern

    https://twitter.com/bocachicagal/sta...11356484620289

  9. #4809
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    SN-15 Static Fire!

    ​​​​​​​Assuming the data is good they may do another using the header tanks.

    https://twitter.com/NASASpaceflight/...01847504154624
    Last edited by docmordrid; 2021-Apr-26 at 10:26 PM.

  10. #4810
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    "Putting SpaceX’s Starship program in the proper context"

    https://www.thespacereview.com/article/4160/1

    Where does the SpaceX Starship vehicle fit, anyway? It came out of nowhere, in response to no government RFP or recognized industry-wide need. There is no established market for its capabilities and apparently is being constructed for much the same reasons that people build little airplanes in their garage. It has been created based on the vision of one man. But perhaps the real question is, “Where should the Starship fit in the launch industry?”
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  11. #4811
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    "Bezos’ Blue Origin protests NASA awarding astronaut lunar lander contract to Musk’s SpaceX"

    https://www.cnbc.com/2021/04/26/jeff...ks-spacex.html

    Jeff Bezos’ Blue Origin filed a protest with the Government Accountability Office against NASA on Monday, challenging the space agency’s award of a nearly $3 billion moon lander contract to Elon Musk’s SpaceX earlier this month.

    SpaceX, in a competition against Blue Origin and Leidos’ subsidiary Dynetics, was awarded $2.89 billion for NASA’s Human Landing System program. The HLS program is focused on building a lunar lander that can carry astronauts to the moon’s surface under NASA’s Artemis missions. For HLS, SpaceX bid a variation of its Starship rocket, prototypes of which the company has been testing at its facility in Texas.
    I am because we are
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  12. #4812
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    Well, gosh, Blue Origin, if this bothers you so much why didn’t you make a competitive bid?

    "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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  13. #4813
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    Quote Originally Posted by Van Rijn View Post
    Well, gosh, Blue Origin, if this bothers you so much why didn’t you make a competitive bid?
    Or even a compliant one.
    I may have many faults, but being wrong ain't one of them. - Jimmy Hoffa

  14. #4814
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    Blue Origin, a company which has sent 0kg to orbit, is making themselves look silly with this protest. They presented a plywood & balloons lander concept, SpaceX actually flew 120+ tonnes of stainless steel prototype and could show NASA the production line.

    Game, set, match.

    Quote Originally Posted by selvaarchi View Post
    "Putting SpaceX’s Starship program in the proper context"

    https://www.thespacereview.com/article/4160/1
    The last 2 paragraphs deliver the punchline...

    Already, the Starship is far beyond anything previously accomplished in its area. It is not a very limited subscale-of-a-subscale test vehicle along the lines of the Delta Clipper. It is not a subscale prototype like the cancelled X-33; it is a full-scale prototype and has actually flown multiple times, using an entirely new propulsion system. The reason they’ve had so many failures of the Starship prototypes is that it represents nearly a half-century of development compressed into a short period of time.

    And the Starship is actually designed for true human space exploration, not for endlessly repeating the Gemini program with a minivan rather than a sports car. Good luck to them!
    Last edited by docmordrid; 2021-Apr-27 at 06:05 AM.

  15. #4815
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    I must say though, Blue Origin does have the nicer warehouse. It's something...
    With sufficient thrust, water towers fly just fine.

  16. #4816
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    Quote Originally Posted by Nicolas View Post
    I must say though, Blue Origin does have the nicer warehouse. It's something...
    Maybe they have more unoccupied hands to spruce things up. Just sayin'.
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

  17. #4817
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    And no activity going on that can put stains and trash on those pristine floors. Sigh....

    They even have a video showing of their dormant, unused aunch complex. Weird. Boca might be a bit haphazard in comparison, but for a good reason.
    With sufficient thrust, water towers fly just fine.

  18. #4818
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    FCC approves lower StarLink orbits...which drew many objections from the competition.

    https://twitter.com/joroulette/statu...66221691015169

  19. #4819
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  20. #4820
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    Static fire today used the header (landing) tanks.

    Targeting a Friday launch.

  21. #4821
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    Crew-1's return delayed by weather...

    HOUSTON (NASA PR) — NASA’s SpaceX Crew-1 mission with NASA astronauts Michael Hopkins, Victor Glover, and Shannon Walker, and Soichi Noguchi of the Japan Aerospace Exploration Agency (JAXA) is now targeting a return to Earth at 11:36 a.m. EDT Saturday, May 1, in the Gulf of Mexico off the coast of Florida. The Crew Dragon spacecraft, named Resilience, is scheduled to undock from the International Space Station at 5:55 p.m. Friday, April 30, to begin the journey home.

    NASA and SpaceX agreed to move Crew-1’s undocking and splashdown from Wednesday, April 28, following a review of forecast weather conditions in the splashdown zones off the coast of Florida, which currently predict wind speeds above the recovery criteria. Teams will continue to monitor weather conditions for splashdown ahead of Friday’s planned undocking.

    The return to Earth – and activities leading up to the return – will air live on NASA Television, the NASA App, and the agency’s website.
    >

  22. #4822
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    Blue Origins protest is a hoot 😂

    https://spacenews.com/blue-origin-pr...-system-award/

    >

    Blue Origin argued that, by selecting SpaceX, NASA is jeopardizing the broader commercial space industry. “This single award endangers domestic supply chains for space and negatively impacts jobs across the country, by placing NASA space exploration in the hands of one vertically integrated enterprise that manufactures virtually all its own components and obviates a broad-based nationwide supplier network,” it stated. “Starship is incompatible with other U.S. commercial launch vehicles, further restricting NASA’s alternatives and entrenching SpaceX’s monopolistic control of NASA deep space exploration.”

    >

  23. #4823
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    LabPadre stream of the header tank test, including their thermal*cam

    https://youtu.be/xPTdb8JpZpo

  24. #4824
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    Quote Originally Posted by docmordrid View Post
    They are talking about the company that hired 500 people overnight, right? And their main argument is "don't choose that, they're efficient"?
    With sufficient thrust, water towers fly just fine.

  25. #4825
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    StarLink 24

    Date: April 28, 2021
    Time: 1144 Eastern

    https://youtu.be/RBxkRKZ34yo

  26. #4826
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    Nice launch and landing of the first stage. Great video of that landing.

  27. #4827
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    entrenching SpaceX’s monopolistic control of NASA deep space exploration
    ...their what? Since they launched their boss's car into solar orbit, exactly what percentage of NASA's deep space launches have gone to SpaceX?
    Really, they've been remarkably slow to make use of SpaceX outside of ISS services.

  28. #4828
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    Sounds like Jeffy-boy's reaching for straws.

    FCC grants a Special Temporary Authority to SpaceX for using a StarLink terminal on Starship.

    https://twitter.com/WatchersTank/sta...08892428259331

  29. #4829
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    SN-15, SN-16, SN-17

    And here we go...three Starship launches licensed by FAA

    Christian Davenport ✓ @wapodavenport
    NEW: The FAA has authorized the next THREE SpaceX Starship launches, SN15-17: “Prior to the launch of SN15, the FAA will verify that SpaceX implemented corrective actions arising from the SN11 mishap investigation.” 1/2
    ||
    “For the launch of SN16 and SN17, SpaceX may be subject to additional corrective actions if any new mishap investigations were to occur.” 2/2
    ||
    And more thing... “The FAA safety inspector is expected to arrive on site on April 29 to support a possible launch this week.”

    https://twitter.com/wapodavenport/st...28942418161665
    https://twitter.com/wapodavenport/st...29385206640640

  30. #4830
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    Sounds reasonable. It's still a huge explosive vessel they're bringing into the air, so a bit of external oversight doesn't hurt.
    With sufficient thrust, water towers fly just fine.

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