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Thread: SpaceX Starship & StarHopper [Starship Mk1 pre-flight tests begin]

  1. #91
    Moderator Dr Mordrid's Avatar
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    1)

    Elon Musk ✔ @elonmusk
    Replying to @TJ_Cooney

    Wow, 2011 seems like eons ago! With fairing recovery, Falcon is ~80% reusable, but reflight takes several days & requires boats. Starship will be fully reusable with booster reflight possible every few hours & ship reflight every 8 hours. No boats needed.
    |
    That said, most Starship spaceports will probably need to be ~20 miles / 30km offshore for acceptable noise levels, especially for frequent daily flights, as would occur for point to point flights on Earth

    https://twitter.com/elonmusk/status/1191496935250616321

    2) cargo module fin installation (time lapse)

    Dr. Mordrid
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  2. #92
    Moderator Dr Mordrid's Avatar
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    I'd pay good money to see this...

    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
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    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
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    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

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  3. #93
    Moderator Dr Mordrid's Avatar
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    Starship Mk1

    Preps underway for the start of ground support equipment (GSE), pressure and fuelling tests, and a static fire, leading up Mk1 lifting off for its 20km test of the skydiver landing - hopefully in December.

    The fun begins tomorrow, so fire up LabPadre's 24/7 live stream.

    Dr. Mordrid
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    An elephant is a mouse built to government specifications.

    I carry a gun because I can't throw a rock 1,250 fps

  4. #94
    Super MURCer KRSESQ's Avatar
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    That thing looks like they literally rolled it to the launchpad. I assume they expect those dents to pop out when they pressurize the tanks?

  5. #95
    Moderator Dr Mordrid's Avatar
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    Some will, but Mk1 doesn't need to be a high-qual finish structure. All it needs to do is go up 20km and prove the skydiver landing.

    In skydiver Starship scrubs almost all horizontal speed during entry, then belly-flops vertically using the drag fins to maintain attitude. Then it rotates for a vertical landing.



    Mk2's ring segments are also made of ~6 mm plates, but with a better finish. It'll fly from the pad they're co-siting at KSC LC-39A. It'll go to the launch site soon.

    Mk2
    EHldLliX4AETkK6.jpg

    Mk3 (Boca Chica) and Mk4 (KSC) will use single-piece one-weld 2mm steel rings with a higher quality build. They are the next builds, followed by Super Heavy 1 and 2.

    Mk4 or Mk5 will go to orbit.

    Mk4 single-piece ring segments, some pre-stacked in pairs.
    Mk4 rings-640.jpeg
    Last edited by Dr Mordrid; 17th November 2019 at 21:22.
    Dr. Mordrid
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  6. #96
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    Cargo Starship, new image from the NASA lunar landers announcement - cropped & zoomed

    Cargo Starship zoom 2048.jpg
    Dr. Mordrid
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  7. #97
    Moderator Dr Mordrid's Avatar
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    Oopsie!!

    Mk1 popped its top during pressurization tests. Looked like a weld unzipped. Musk says they're moving on to Mk3.

    When he says "quite different" one example seen on Mk2 is the upper dome was built an entirely different way.

    Mk1 Starship Nov 20 pressure failure2.jpg

    Everyday Astronaut @Erdayastronaut
    Starship MK-1 appears to have blown its top off during a pressure test today. My guess... this will be a good time for @spacex to move onto their next, more refined and higher quality versions (MK-2/3) instead of reparing MK-1. @elonmusk, any chance you’ll just move onto MK-3?
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    Elon Musk ✔ @elonmusk
    Absolutely, but to move to Mk3 design. This had some value as a manufacturing pathfinder, but flight design is quite different.
    4:54 PM - Nov 20, 2019

    https://twitter.com/elonmusk/status/1197271943180771329
    Last edited by Dr Mordrid; 20th November 2019 at 17:58.
    Dr. Mordrid
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  8. #98
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    Turns out they were moving on to the Mk3 builds for flight anyhow. Those use the single-piece ring segments and a different dome design.

    SpaceX statement

    The purpose of today's test was to pressurize systems to the max, so the outcome was not completely unexpected. There were no injuries, nor is this a serious setback. As Elon tweeted, Mk1 served as a valuable manufacturing pathfinder but flight design is quite different. The decision had already been made to not fly this test article and the team is focused on the Mk3 builds, which are designed for orbit.
    Video of it letting go at the tweet

    https://twitter.com/thesheetztweetz/...06617760559104
    Last edited by Dr Mordrid; 20th November 2019 at 17:58.
    Dr. Mordrid
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    An elephant is a mouse built to government specifications.

    I carry a gun because I can't throw a rock 1,250 fps

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