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  1. #16
    Join Date
    May 2008
    Location
    UK
    Posts
    848

    Default

    Exactly Ian.

    Yes, the spars, 50% carbon/50% glass, do bend in that way. Quite soft at first, then stiffen up quickly. Windsurfing masts work in the same way, loads of downhaul pulled on with feet against the mast foot to pre-load the spar.

    Staying is important. Unstayed the mast head can only bend off under pressure of the yard, and create a convex bend. Holding the head steady allows the concave bend.

    As far as I am aware this set up is unique??? Some one will now post a drawing from the 1800 where it was used!

    My boom also bends a a lot, same 50/50 carbon glass, and single point sheeting. Flattens the sail loads upwind. Sailmaker is aghast!

    What fun.

    Brian

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  3. #17
    Join Date
    Nov 2008
    Location
    Salem, Mass, USA & Co. Sligo, Ireland
    Age
    82
    Posts
    38

    Default Halfway there...

    While cruising MIK's various threads (Interesting boat links) I stumbled across a video that shows a racing class that tacks their spar/sail around the mast.

    Not the balanced lug rig that was being discussed here - more of a lateen / no boom rig - but definitely promising to me - I'm halfway there!

    The video is here (wild sailing indeed)...
    [ame="http://video.google.com/videoplay?docid=-7796071923054969577"]BARQUILLOS DE VELA LATINA CANARIA en Fuerteventura[/ame]

    Very interesting to see them tacking the boat in as little 5 or 6 seconds with the sail drawing full - some much more practiced than others!

    Now to figure reefing those buggers...

  4. #18
    Join Date
    Apr 2009
    Location
    Hunter Valley NSW
    Age
    69
    Posts
    1,759

  5. #19
    Join Date
    Jul 2005
    Location
    'Delaide, Australia
    Age
    65
    Posts
    8,138

    Default

    Howdy Bruce,

    It is great footage.

    You can see the close relationship of different rigs here and how the names are quite arbitrary.. These are definitely historically and practically lateen rigs, however with the little standing luff (necessary so they can tack the yard quickly without it hitting the deck) they are closely related to the dipping lug as you noticed

    There is a similar relationship between the squaresail and the balance lug ... which in some ways is a squaresail slid back so more is behind the mast. That's where it comes from historically.

    And the arguements and confustification from uncertainty about what is a gunter lug and what is a gaff rig is hard to tell sometimes. This can get nasty when pedants (like me) try to be very careful about what we call a yard and what we call a gaff.

    All the rigs that were born from the squaresail call the top spar a yard.

    The best indicator as to which sail type is the history of the boat type. Here the boats are Arabic/Mediterranean types, so clearly are a Lateen.

    MIK

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