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Thread: Dismasted

  1. #11
    Join Date
    Aug 2009
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    Scotland.
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    14,513

    Default Re: Dismasted

    Quote Originally Posted by Concerto View Post
    ..... I would expect to remove the pins for speed as there are only 7 to remove on my Fulmar's ¾ rigged mast. For larger boats a battery powered angle grinder would be my choice.
    Th video showed that hacksaw blades for stainless were very fast, although the item to be cut was under tension, much faster than and easier than removing a split pin, position a drift, hammering out a pin. IIRC there is a thread on this forum where a person who lost their mast described pushing out the pins; it was not difficult to do. The suggestion being, don't worry to much about rigging cutters as driving the pins out is straight forward and works. No idea the size of boat.
    "'...contradictions .... are deliberate exercises in doublethink." Orwell from 1984

  2. #12
    Join Date
    Nov 2001
    Location
    Me: Johannesburg South Africa Yacht: Richards Bay East Coast Africa
    Posts
    7,347

    Default Re: Dismasted

    Another way to release the rigging is to unlock and disconnect the rigging screws with simple hand tools (spanner and screw driver
    Life is too short not to have a sea view
    Distantshaws tinyurl.com/yclt6l68

  3. #13
    Join Date
    May 2003
    Location
    SPAIN,Galicia
    Posts
    12,992

    Default Re: Dismasted

    I recall the text of some BOT scenario in an examination for masters where the foremast carried away and the mainmast topsle was swinging about and you had lost steerage due to rudder damage............what would you do!

  4. #14
    Join Date
    Aug 2013
    Location
    SW Scotland
    Posts
    19,759

    Default Re: Dismasted

    Quote Originally Posted by Concerto View Post
    You should have tried my Hunter Formula 1, a Stephen Jones extreme race boat 22ft long, 8ft beam and lock down keel. With the mast down and the keel lifted ready to enter the launching/recovery trailer, that was very tippy and you had to be very careful moving anywhere on board.
    Oo-er. I can imagine. My Hunter 490 (someone give me some money and just take it away, please) is noticeably wobbly with the keel raised ... I've never been on board with the mast down too, but really wouldn't fancy it.
    "Seamen are always wanting to do things the proper way; and I like to do them my way."

  5. #15
    Join Date
    May 2003
    Location
    SPAIN,Galicia
    Posts
    12,992

    Default Re: Dismasted

    Traditional keel boats without their mast stepped are very tippy indeed

  6. #16
    Join Date
    Dec 2007
    Location
    S.W. France
    Posts
    7,866

    Default Re: Dismasted

    Read about Hammond Innes motoring his new steel boat to UK from Holland. No rig , and it had a nasty short roll. Very unpleasant.
    The inertia of the mast matters.

  7. #17
    Join Date
    May 2003
    Location
    SPAIN,Galicia
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    12,992

    Default Re: Dismasted

    That’s the word,inertia

  8. #18
    Join Date
    Aug 2013
    Location
    SW Scotland
    Posts
    19,759

    Default Re: Dismasted

    Quote Originally Posted by DownWest View Post
    The inertia of the mast matters.
    Technically it's the (second) moment of inertia. My mast had a mass of 50kg and a length of 8m, giving it a moment of inertai about its centre of 267 kg m2, which gets an additional 1250 kg m2 when rotating around the metacentre, about 5m lower down. That's a total of about 1500 kg m2, which is about 2.5 times as much as the 500 kg keel had. It doesn't help with righting, of course, but the mast is generally much more important for dynamic roll resistance.
    "Seamen are always wanting to do things the proper way; and I like to do them my way."

  9. #19
    Join Date
    Dec 2007
    Location
    S.W. France
    Posts
    7,866

    Default Re: Dismasted

    JD
    You do speak English as well, don't you?

  10. #20
    Join Date
    Nov 2009
    Location
    Somewhere in the Atacama
    Posts
    413

    Default Re: Dismasted

    Re what to do when your mast falls over....

    Not all your rigging will be under load... the bit that failed won't be for starters.
    Most of it you can pop the pins quite easily.
    If you have a roller furler best thing is a hacksaw above the furler drum
    You will end up with only one loaded wire connecting rig to boat.
    Hacksaw works on wire under load.

    Don't ask how I know this.....

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