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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HNMO2R7BCMIHOABOYQE37YOWUYCT4MP7/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "HNMO2R7BCMIHOABOYQE37YOWUYCT4MP7",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/HNMO2R7BCMIHOABOYQE37YOWUYCT4MP7/?format=api",
    "sender": {
        "address": "hans.bx2abt (a) msa.hinet.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Hans BX2ABT",
    "subject": "[amsat-bb] Thrust bearing question",
    "date": "2018-10-12T13:09:53Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Happy happy, I finally got enough money to order a roof tower for my \nfuture satellite antenna farm. First time ever that I can have a \nrotatable setup and I'm tickled pink. It's a 3.3 meter tower that came \nwith a 3 meter steel pole and this will all be mounted on top of our \nsheet metal roof. Friends over in Holland donated a KR-400 rotator and \nYaesu GS-050 thrust bearing and I have a question about that last one.\n\nThe tower's dimensions look like this (there are some photos and a pdf \n<http://bx2abt.com/main/data/_uploaded/file/BV6HJ-OMseriesTower.pdf> on \nbx2abt.com):\n\n|\n|     1.5 meter steel pole sticking out for 6/2/70cm yagis\n|\n|\n--   (1) top of tower with plateau for bearing\n|*\n|*\n|*\n|*\n---  (2) plateau for second bearing\n|**\n|**\n|**\n---- (3) plateau for rotator\n****\n****\n****\n\nDistance 1-2 is 110 cm\nDistance 2-3 is 50 cm\n\nThe bearing plateaus have pre-drilled holes that accommodate the Yaesu \nGS-065 thrust bearing. The GS-050 thrust bearing I have is smaller and \ndoesn't fit, but can be made fit without much hassle.\n\nMy questions - with keeping in mind that where I live we often have very \nstrong storm-like winds (over 100 km/hr) and more than one typhoon every \nyear (up to and sometimes over 180 km/hr):\n\n1 - will just a top bearing and a rotator be enough, or do I need indeed \ntwo thrust bearings?\n2 - if one will do, will the GS-050 be suitable?\n\nI understand that thrust bearings are mainly used to reduce the weight \nof the pole on the rotator, but I am more concerned about strong winds \nwarping the pole and putting sideways stress on the rotator. With the \nfoul weather here everything has to be as strong as possible, but on the \nother hand, money has to be spend where it is needed, not where it's wasted.\n\nHope you can give some advice to this tower newbie. Cheers,\n\nHans\nBX2ABT\n\n",
    "attachments": []
}