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Re: [bolger] Riggin Question

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  • Sam Glasscock
    Thanks for the advice. I am anxious to see what effect that big, heavy stick has on the period of roll. I don t expect to sail her much, but it will be nice
    Message 1 of 2 , Feb 11, 2007
      Thanks for the advice. I am anxious to see what
      effect that big, heavy stick has on the period of
      roll. I don't expect to sail her much, but it will be
      nice to have a get-home rig.
      --- Allan Pickman <alpickman@...> wrote:

      > Sam
      >
      > I would say that your chainplates are far enough aft
      > and outboard that your mast should be stable. On
      > my Thistle, which has an about 23' long mast stepped
      > "on deck", if you can call it that, the stays are
      > about 2'9" off the center line, and 18" aft of the
      > mast. There are no backstays, standing or running.
      > the total sail area is about 180 square feet, a
      > large main and a middling sized jib. the stays all
      > land about 2/3 the way up the mast.
      >
      > Admittedly this is a heavily canvased dinghy, on
      > which a capsize is likely to happen far sooner than
      > a catastrophic failure of the standing rigging, but
      > I think that your stays are OK, as long as
      > everything is sound. Inspect everythig carefully,
      > looking for corrosion, cracs and rot, and give it a
      > try with what you've got.
      >
      > Bolger's 100 Small Boat Rigs has a lot of
      > interesting history and philosophy, but not a lot of
      > detail when it comes to sizing and laying out stays
      > etc.
      >
      > --
      > Allan,
      > in the hills
      >
      > > Sam Glasscock <glasscocklanding@...> wrote:
      > I will be setting
      > up the mast on my little
      > > motorsailer for the first time in a few weeks.
      > The
      > > mast is a hollow spruce stick 20' in length. It
      > is
      > > stepped on the coach roof over a compression
      > post--the
      > > step is probably 5' above the waterline. There
      > is no
      > > spreader or back-stay. The shrouds attach to
      > chain
      > > plates on the sides of the deck house, about two
      > feet
      > > higher than the step. The attachment points are
      > about
      > > 3' outside of the mast, and about 2.5' astern of
      > it.
      > > There is a forestay, of course. My questions:
      > are
      > > shrouds so closely placed to the mast sufficient
      > to
      > > carry the load from the side and astern? Should
      > I add
      > > a back-stay, or spreaders and lower shrouds? Is
      > there
      > > a book, like Bolger's 101 sail rigs, that
      > describes
      > > how to calculate loading and whether the stays
      > are
      > > sufficient? Presumably, she is alright as
      > rigged,
      > > but I have no idea how she has been modified over
      > the
      > > years. The questions may be stupid ones, but
      > this is
      > > the first time I have handled a mast near this
      > size,
      > > and the close attachment points of the shrouds
      > has me
      > > a little worried. Thanks. Sam
      >
      >




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