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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5HZNA4HIWJOSW7LZA5MDHAQOEJAB5AAK/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "5HZNA4HIWJOSW7LZA5MDHAQOEJAB5AAK",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/EROJLEUY4WTOEOPAMQ7ILP672Y4IOXSA/?format=api",
    "sender": {
        "address": "vk3jed (a) gmail.com",
        "mailman_id": "e049fcabdd4648088cd7ce227ab7c655",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/e049fcabdd4648088cd7ce227ab7c655/emails/?format=api"
    },
    "sender_name": "Tony Langdon",
    "subject": "[amsat-bb] Re: Could we raise orbit thru magnetorque?",
    "date": "2007-02-21T20:19:15Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/EROJLEUY4WTOEOPAMQ7ILP672Y4IOXSA/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OZ6HUSBYY5ZLAZAA5GLM4YVP2XF556SM/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "At 05:55 AM 2/22/2007, Marc Vermeersch wrote:\n>All,\n>\n>So why is the maglev principle (magnetic levitation)\n>http://www.google.be/search?hl=nl&q=maglev&meta=\n>not applicable in space?\n>\n>Magnetic levitation applied to trains generates an upward force equal and\n>opposite to the earth's gravitation.\n\nMuch larger (relative) difference in separation between the pole \npairs that are repelling each other.  One pair (top of the track and \nbottom of the train) are almost touching, the other ends of the \nfields are much more widely separated.\n\nIn the case of a satellite around the Earth, the difference in \nseparation is almost zero (width of the satellite, compared to the \ndistance from the satellite to the Earth's magnetic poles).  The \ngradient of the Earth's magnetic field is quite small, even near the \nmagnetic poles.  You could get a very small lift by orienting the \nsatellite correctly and turning on the magnetic field as it passes \nover the poles, but the effect would be incredibly tiny, and holding \nthe orientation would take another system, to prevent the system \nproviding torque instead of thrust (if that uses fuel, then the \nexercise is pointless ;) ), and if it's magnetic, it could nullify \nthe thrust from the magnetic thruster.\n\n73 de VK3JED\nhttp://vkradio.com\n\n",
    "attachments": []
}