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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PKM72HSJNDWB6UTSXNM5N7H2R4LP32R5/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "PKM72HSJNDWB6UTSXNM5N7H2R4LP32R5",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RMXFU7HCH76CBIXSBXMADPFOHKA46G54/?format=api",
    "sender": {
        "address": "peter.guelzow (a) kourou.de",
        "mailman_id": "c1ef441a593c454695e682f65935fe93",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/c1ef441a593c454695e682f65935fe93/emails/?format=api"
    },
    "sender_name": "Peter Guelzow",
    "subject": "[amsat-bb] Re: Can we get them to fix AO-40 first then?",
    "date": "2009-10-17T19:30:27Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WIKMG3QLKDVLE3DX5JNP6Z7UY43DNEAU/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Gordon,\n\nsuch a fuse would not prevent a battery from an internal short-cut in\none or more cells...  that's in fact what happened to AO-40.\nAlso you have to make such a \"failsafe\" feature really fail safe, so\nthat it does not hit you in the back if it fails..\nThese kind of things, like Watchdogs, always sound simple and easy, but\nvery often they are cause for more trouble.\nWe have seen satellites with Watchdogs going mad and resetting computers\nwhile it was not necessary and do more harm than good.\nClearly, nobody expected that the battery would die so quickly,\notherwise some actions would have been done before...\n\n73s Peter\nDB2OS\n\n\n\nGordon JC Pearce wrote:\n> On Mon, 2009-10-12 at 03:24 -0400, Luc Leblanc wrote:\n>\n>   \n>> 40 back, we will. If the voltage is clamped low and there is no other damage, we may end up waiting a long time for a cell to \"open\", \n>> hopefully not as long as for AO-07. ..or it may happen today. No success for even weeks or months does not mean that we won't eventually be \n>> successful. \n>>     \n>\n> On a more practical note, could there be some sort of failsafe \"battery\n> went phut so disconnect it\" device?  I'm guessing a perfectly ordinary\n> inline fuse would be too simple, but perhaps some sort of mechanical\n> latch that would just pop the battery terminal if it lost power would\n> work.\n>\n> Gordon MM0YEQ\n>\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the author.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n>   \n\n",
    "attachments": []
}