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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/T42D4C2ZWFNHAJF6MIH3QGLSLH6AV2ZL/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CAKoSLJ0GSm7Lh4gne2S4W+wFONo4qfd6aK=s=3L7gfOyUp2W6g@mail.gmail.com",
    "message_id_hash": "T42D4C2ZWFNHAJF6MIH3QGLSLH6AV2ZL",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/QE3CPCKFZYIXJ3R65X7P4SMZ2ITHKYPA/?format=api",
    "sender": {
        "address": "miguel.barreiro.paz (a) gmail.com",
        "mailman_id": "da8f5fc9421b470d81423318706a75d7",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/da8f5fc9421b470d81423318706a75d7/emails/?format=api"
    },
    "sender_name": "Miguel Barreiro",
    "subject": "Re: [amsat-bb] Near Space Flight Question",
    "date": "2015-04-19T16:58:57Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QE3CPCKFZYIXJ3R65X7P4SMZ2ITHKYPA/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Short answer: by inflating the balloon only partially.\n\nAs the balloon goes higher, atmospheric pressure decreases and thus the\nballoon grows bigger and bigger, eventually to the point of bursting.\nBy inflating the balloon partially you give the smaller amount of contained\ngas more room to expand, hopefully reaching a stable flotation height\nbefore bursting. That comes at the cost of decreased payload and climb\nrate, obviously.\n Pardon me asking this question as it only relates to amateur satellites in\na small way as the packages I refer to don't achieve escape velocity.\n\nOver the years I've followed the work being done regarding flying radio\npackages on balloons.\n\nI'm familiar with the scenario of a balloon carrying a package that will go\nto a predetermined altitude, bursting then returning to the ground.\n\nWith the advent of the round-the-world experiments with small party\nballoons, how do project organizers keep such equipment in the jet stream\nso that they travel long distances without the equipment going so high that\nthe balloon bursts?\n\n\n\n\nDave Marthouse N2AAM\[email protected]\n_______________________________________________\nSent via [email protected]. AMSAT-NA makes this open forum available\nto all interested persons worldwide without requiring membership. Opinions\nexpressed\nare solely those of the author, and do not reflect the official views of\nAMSAT-NA.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n",
    "attachments": []
}