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Thread: SpaceX

  1. #4051
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    Oh, my...

    coming up: two on their pads at once

    RGVAerialPhotography @RGVaerialphotos
    Jan 2, 2021
    With SN10 nearly complete and repairs being done at the landing pad, do you think this is something we will get to see in the next few weeks?
    #spacex #starship #Bocachica
    (2100ft msl, 01/01/2020)

    20210102_200803.jpg
    |
    Elon Musk ✓ @elonmusk
    Yes

    https://twitter.com/elonmusk/status/1345521261246496769

  2. #4052
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    Quote Originally Posted by Garrison View Post
    So it appears that Elon Musk has decided Super Heavy setting down on landing legs is too prosaic and he wants to have a mechanism that catches the grid fins. Scott Manley explains:

    https://www.youtube.com/watch?v=lEAyjtIIccY
    I wouldn’t involve the TEL, but maybe have lightning protection towers do double duty.

    Think Arecibo meets the mock beheading scene from The Wicker Man.
    There, several swords are irised around a stuffed figure.

    Arrestor cables may be held by bogies at different levels such that they cinch up up after the engine block passes—the cables feeding into plungers at a base.

    Below, perhaps the opposite of the R-7 petal system, the cables pantographing the core over just so.

    If there are problems refueling...the SPECTRE spacecraft Bird One would have to disgorge inner tanks to make room for the capsules it could eat. Perhaps that set up could help in some ways.

  3. #4053
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    SN9's flight could be very, very soon.

    https://youtu.be/PiQGWWZyxgA

    Video note
    NOTE: Work on this animation started before SN9 rolled out the pad. I did not expect SN9 to be placed on Pad B as opposed to Pad A.

    SN8 got SO close. In the next few weeks, SpaceX will attempt to stick the landing with the next Starship Prototype, SN9. The flight will likely be very similar to SN8's flight, though the exact altitude may be different.

    If you like to help support future videos: https://www.patreon.com/C_Bass3d

    Twitter: https://twitter.com/C_Bass3d

  4. #4054
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    I expect a polished version of the SN8 flight, just like with the two hover flights. So a less explosive landing and less overshoot on the return to vertical. The rest of the flight already was pretty perfect on SN8.
    With sufficient thrust, water towers fly just fine.

  5. #4055
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    Something for you airplane guys to chew over,

    Super Heavy will be 9 meters wide with 4 grid fins. Each grid fin will be 8 meters long, so the "wing span" will be about 25 meters (82 feet).

    That's a pretty broad span for catching the stage with a cable snare.
    Last edited by docmordrid; 2021-Jan-03 at 09:38 AM.

  6. #4056
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    The cranes used to unload container ships are on rails...maybe the arrestor towers can be, with quick releases.
    As an aside, I think the first LV reused was a Redstone. IIRC one lost thrust, settled down on its fins heavily—bending them a bit.
    It was launched later. The control console could fit in a car trunk.

    From a Space Review excerpt comparing it with Saturn V, which is what Super Heavy amounts to.
    Redstone, with hypergolics an dull paint, we call SCUDs.

  7. #4057
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    Quote Originally Posted by docmordrid View Post
    Something for you airplane guys to chew over,

    Super Heavy will be 9 meters wide with 4 grid fins. Each grid fin will be 8 meters long, so the "wing span" will be about 25 meters (82 feet).

    That's a pretty broad span for catching the stage with a cable snare.
    It is one of those things that seems unlikely the first time you think of it but becomes more reasonable the more details you learn. The systems Scott Manley mocked up in KSP actually looked somewhat reasonable and I have no doubt there are plenty of other designs. However I also believe the early Super Heavies will have legs and this will be a long term goal.

  8. #4058
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    Quote Originally Posted by publiusr View Post
    As an aside, I think the first LV reused was a Redstone. IIRC one lost thrust, settled down on its fins heavily—bending them a bit.
    It was launched later.
    In order to reuse a launch vehicle, it has to launch something into space first. A short burp above the platform doesn't count.
    With sufficient thrust, water towers fly just fine.

  9. #4059
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    I have to give credit to SpaceX for allowing their engineers to think outside the box.
    Many times in my engineering career I've lamented having to create a "brute force" design because there was neither time nor money to explore options.

    I also give them credit for apparently being able to balance the "design and demo cycle". I've worked on several projects where design work for production suddenly took back seat to having something to demo.
    This can actually be detrimental to the overall schedule as you essentially jury rig something to show the suits/investors rather than devote time to the final design target.

    One final thought. We see SpaceX doing a lot of "build and test", but there has to be a lot of real engineering going on behind the scenes. One does not -for example- simply build a tank to 1/8" thickness, pressurize it, and declare it "good enough". (See the Columbia foam incident for a design that worked "most of the time".) The good news is that SpaceX hasn't been caught in the design paralysis that seems to have hit other companies in the business.
    I may have many faults, but being wrong ain't one of them. - Jimmy Hoffa

  10. #4060
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    Tim Dodd, The Everyday Astronaut, reports that SN-09 will fly NET Wednesday January 6, 2021. 12.5 km.

    https://everydayastronaut.com/starsh...er-flight/amp/

    SpaceX will post a streaming link. Tim Dodd will be streaming on his YouTube channel,

    https://youtube.com/everydayastronaut/live

  11. #4061
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    Quote Originally Posted by docmordrid View Post
    Tim Dodd, The Everyday Astronaut, reports that SN-09 will fly NET Wednesday January 6, 2021. 12.5 km.

    https://everydayastronaut.com/starsh...er-flight/amp/

    SpaceX will post a streaming link. Tim Dodd will be streaming on his YouTube channel,

    https://youtube.com/everydayastronaut/live
    Have they moved SN8 from the landing pad?
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  12. #4062
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    Most of it, and still working.

    https://youtu.be/6Jg8HBZwCpA

    The lighter side of the tower catching a Super Heavy booster mid-air...

    CC: Boston Robotics, Jack Skellington

    https://twitter.com/Julius_Burton/st...36609848684550
    Last edited by docmordrid; 2021-Jan-04 at 02:26 AM.

  13. #4063
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    Quote Originally Posted by docmordrid View Post

    The lighter side of the tower catching a Super Heavy booster mid-air...

    CC: Boston Robotics, Jack Skellington

    https://twitter.com/Julius_Burton/st...36609848684550
    I like the pat on the "head" after the catch.
    At night the stars put on a show for free (Carole King)

    All moderation in purple - The rules

  14. #4064
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    “Nice HLLV...good boy”

  15. #4065
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    Quote Originally Posted by docmordrid View Post
    Most of it, and still working.

    https://youtu.be/6Jg8HBZwCpA

    The lighter side of the tower catching a Super Heavy booster mid-air...

    CC: Boston Robotics, Jack Skellington

    https://twitter.com/Julius_Burton/st...36609848684550
    Yup, saw the NSF video yesterday after I posted.

    Quote Originally Posted by Swift View Post
    I like the pat on the "head" after the catch.
    Me too!
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  16. #4066
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    Scott Manley did a video on the subject.
    https://www.youtube.com/watch?v=lEAy...p=wgIECgIIAQ==

  17. #4067
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    SN-09

    TFRs (Temporary Flight Restrictions)

    Static fire: Wednesday, Jan 6

    TFR: Friday, Jan 8 (alt: unlimited)

    https://tfr.faa.gov/save_pages/detail_1_1073.html

    TFR: Saturday, Jan 9 (alt: unlimited)

    https://tfr.faa.gov/save_pages/detail_1_1076.html

  18. #4068
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    Another SN-09 TFR - this one for Sunday, January 10. Also to unlimited altitude.

    https://tfr.faa.gov/save_pages/detail_1_1077.html

  19. #4069
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    Extending Crew-1?

    Crew Dragon sez: "Bring It!" 🚀🇺🇸🚀

    Christian Davenport ✓ @wapodavenport
    Jan 6, 2021
    NASA tells me the agency is looking at “potentially extending the Crew-1 time on” ISS in order to ensure continued US presence. Dates still in flux, but If Crew-2 were to launch in April and Crew-1 to come home in May that would not leave much room in the schedule. 1/
    ||
    If there’s a launch delay that could make things real tight. As a result: “NASA is investigating several activities that would provide us with more margin for the handover,” NASA says, including extending Crew-1, which would be a real test for Crew Dragon. 2/

    https://twitter.com/wapodavenport/st...21817286217728

  20. #4070
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    SN-09 Static Fire

    Road closed
    Pad cleared
    Tank farm venting
    Propellants loading

    https://youtu.be/j8VyADSAPhM

  21. #4071
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    SN-09

    LOX venting

  22. #4072
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    Tri-venting (usually 12-15 min to ignition)

    SIREN! (10 min)

  23. #4073
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    Static fire !!!

  24. #4074
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  25. #4075
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    Observe and learn SLS, observe and learn how you do static fire tests.

    The static fire of SN9 appeared to go smooth. No fire afterwards that the camera could see and everything seemed to go according to plan. And it refrained from falling over, which is nice.
    With sufficient thrust, water towers fly just fine.

  26. #4076
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    Sounds like another static fire tomorrow (Thursday) - trying for longer.

  27. #4077
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    Starship SN6 has its mass simulator removed, potentially preparing it to be used as the NASA Human Landing System mockup. Meanwhile SN9 continues toward launch preparations, launch currently scheduled for no earlier than January 8th.
    https://youtu.be/woarJ2QrBoo

  28. #4078
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    SpaceX is testing a Falcon Heavy booster at McGregor. This spring it'll fly the USSF-44 mission for the US Space Force.

    https://twitter.com/SciGuySpace/stat...40792688574465

  29. #4079
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    Turksat 5A was rescheduled because of the Turkey-Armenian kerfuffle. The satellite also supports Turkey's military, so protests ensued.

    Date: January 7
    Time: 2028 pm Eastern (0128 UT)

  30. #4080
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    Can someone give (a link to) some context about the Starship lunar mockup? Is it a SpaceX initiative, or part of the deliverables for a NASA contract? Is it for development purposes, or as a sales pitch prop that has more impact than a 3D render?
    With sufficient thrust, water towers fly just fine.

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