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Thread: Falcon 9: AMOS-17 commsat

  1. #1
    Moderator Dr Mordrid's Avatar
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    Default Falcon 9: AMOS-17 commsat

    AMOS-17 for SpaceCom of Israel

    After a sketchy valve on the upper stage revealed itself during the static fire, it was replaced and a second static fire performed.

    Date: August 6 (Tuesday)
    Window; 1852-2020 EDT (2252-0020 UTC)
    Core: B1047.3
    Pad: LC-40
    Recovery: expended
    Orbit: GTO
    Payload mass: ~6.5t
    Last edited by Dr Mordrid; 5th August 2019 at 09:09.
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    Moderator Dr Mordrid's Avatar
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    Default

    Webcast

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    Moderator Dr Mordrid's Avatar
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    AMOS-17 launch success, and fairing recovery vessel Ms Tree caught a fairing

    https://twitter.com/elonmusk/status/1158899839456800769
    Dr. Mordrid
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    Watched the AMOS- 17 launch live. Seemed to go fast from lift off to deployment.
    paulw

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    Moderator Dr Mordrid's Avatar
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    With no recovery (3rd use and at the customers request) and a 6.5t payload on a rocket which can lift over 8.3t to GTO, UP is definitely GO. Zoom...

    They frequently need to throttle it down so a given satellite's load limits aren't exceeded.

    Twitter video of the high speed (pump jet) Ms Tree net-ship catching one fairing half.

    There's a telemetry link between the fairing and Ms Tree, which the net-ship guidance system uses to autonomously position itself under the fairing. The crew is hands-off at this point.

    https://twitter.com/elonmusk/status/1158968745227780096

    Ms Tree
    Last edited by Dr Mordrid; 6th August 2019 at 23:30.
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    Super MURCer Evildead666's Avatar
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    Great News.

    Is the Ms Tree ship autonomous/unmanned or are there people on board ?

    Also, seeing the vid for the first time, i realise that I was expecting the ship to catch the fairing without a parachute
    ie, a really really fast f-ing boat racing left and right to catch the damn thing lol.
    Thats the idea I had in my head...
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    Moderator Dr Mordrid's Avatar
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    Quote Originally Posted by Evildead666 View Post
    Great News.

    Is the Ms Tree ship autonomous/unmanned or are there people on board ?
    Crewed the whole time, but the nav system AI does the catching.

    Also, seeing the vid for the first time, i realise that I was expecting the ship to catch the fairing without a parachute

    ie, a really really fast f-ing boat racing left and right to catch the damn thing lol.
    >
    It is a really fast boat; 4 massive pump jets with over 10,400 hp of engines plus electric Thrustmaster pod thrusters, including a bow tunnel thruster that can pump port or starboard. Yup, she can translate.

    Now SpaceX has two net-ships in their fleet, one for each fairing half.

    Ms. Tree

    Ms. Chief

    Videos of Ms. Tree (as Mr. Steven) practicing maneuvers (note the zig-zag wake & it going backwards) and an early failed attempt.

    https://youtu.be/VlCO7gBXWNA

    https://youtu.be/xPeFbEbxPKQ
    Last edited by Dr Mordrid; 16th August 2019 at 18:54.
    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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