Re: [bolger] Riggin Question
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:
The fish are biting.
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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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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
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