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Thread: SpaceX

  1. #2581
    Join Date
    Oct 2001
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    4,469
    Would the same sound mitigation be used for any would-be sea launches, though? And what's the impact of this noise level on marine and coast life? My previous question was more about that than land launches at 39-A.

    CJSF
    "Flipping this one final switch I'm effectively ensuring that I will be
    Overcoming all resistance long after my remains have been
    Vaporized with extreme prejudice and shot into outer space.

    I'll be haunting you."

    -They Might Be Giants, "I'll Be Haunting You"


    lonelybirder.org

  2. #2582
    Join Date
    Feb 2011
    Posts
    910
    Quote Originally Posted by CJSF View Post
    Would the same sound mitigation be used for any would-be sea launches, though? And what's the impact of this noise level on marine and coast life? My previous question was more about that than land launches at 39-A.

    CJSF
    I doubt they'll just shoot the plume at the water's surface because it's salt water, which is very corrosive - and abrasive if partly evaporated. A blistering hot salt spray being back-splashed and abrading the platforms steel structure is the last thing they'd want.

  3. #2583
    Join Date
    Feb 2011
    Posts
    910
    Coolness....

    Malcolm Head @malcolmmarsman
    Starship's success revolves around the skydiver-and-flip manuver, which appears to be extremely complex. What gives you confidence that it will work?

    https://twitter.com/malcolmmarsman/s...48482005053449
    |
    Elon Musk @elonmusk
    No problem. We could program Starship to perform Swan Lake in the sky. Minimizing landing burn propellant mass is what's hard.

    https://twitter.com/elonmusk/status/1192549052170166272
    |
    Charles A. Lurio @TheLurioReport
    Replying to @elonmusk @Malcolmmarsman and @flcnhvy
    Starship pull-up maneuver was conceived in '90s for never-built, incremental successors to DC-X. Old tech. Now, Swan Lake could probably use today's computing power.

    https://twitter.com/TheLurioReport/s...26084535242752

    DC-X Flight #8: "Swan Dive" maneuver

    https://youtu.be/wv9n9Casp1o

  4. #2584
    Join Date
    Jun 2004
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    The Great NorthWet
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    14,640
    Quote Originally Posted by bknight View Post
    That would work if there are rather calm seas, without the platform oscillating with waves or some method of launch pad dampening, much like a drilling assembly stabilization.
    That's part of the beauty of semi-submersibles. Once ballasted down, they are quite stable and little affected by waves, even without dynamic positioning.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  5. #2585
    Join Date
    Jun 2015
    Location
    Houston
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    1,204
    Quote Originally Posted by Trebuchet View Post
    That's part of the beauty of semi-submersibles. Once ballasted down, they are quite stable and little affected by waves, even without dynamic positioning.
    You obviously have not been on one during very rough sea conditions.

  6. #2586
    Join Date
    Feb 2011
    Posts
    910
    @spacepadreisle
    #Starship MK1 at #SpaceX #BocaChica first round of testing delayed one more day due to major cold front. Now rescheduled for Wednesday and Thursday Nov 13-14, 12-8pm co.cameron.tx.us/wp/space-x/

    https://twitter.com/spacepadreisle/s...44896774950912

    IMG_20191109_121732.jpg

  7. #2587
    Join Date
    Sep 2004
    Posts
    15,546
    Quote Originally Posted by bknight View Post
    You obviously have not been on one during very rough sea conditions.
    The weird part is not when the dustbin, all by itself, tumbles over and empties itself all over the bridge floor. The weird part is when 6 seconds later, all by itself, all the litter proceeds in the direction of the dustbin, hops in, and the dustbin rights itself up again.
    With sufficient thrust, water towers fly just fine.

  8. #2588
    Join Date
    Feb 2011
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    910
    Quote Originally Posted by Nicolas View Post
    The weird part is not when the dustbin, all by itself, tumbles over and empties itself all over the bridge floor. The weird part is when 6 seconds later, all by itself, all the litter proceeds in the direction of the dustbin, hops in, and the dustbin rights itself up again.
    Any boat on Gitchi-Gami during a fall storm?

    Wicked waters that can scare the bejesus out of you....
    Last edited by docmordrid; 2019-Nov-12 at 06:04 AM.

  9. #2589
    Join Date
    Sep 2004
    Posts
    15,546
    Close. Atlantic crossings with vessels optimized for very different conditions.
    With sufficient thrust, water towers fly just fine.

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