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Subject: [worldcruising] Re: Wiring inside masts - stripping and painting a mast
From: pete_pisc (pete_pisc@XXX.XXX)
Date: Wed Jul 24 2002 - 15:28:02 EDT
Four years ago, I pulled an aluminium mast that had been painted
black. I followed the advice offered in Dan Casey's "This Old Boat"
and stripped the old paint, wet sandeded it, chemically etched the
surface, applied a primer coat, then about 3 coats of two part
Interlux LPU (white) with a mohair roller. The result looked great
(you can see your reflection in it) and is still in great shape after
4 years. The only issue I faced was I allowed some droplets to harden
in the sail track that proved to be a nuisance when hoisting the sail
for a while.
If your mast was originally painted it probably wasn't anodized.
Peter
San Francisco
--- In worldcruising@XXX.XXX> wrote:
> Thanks to all those who responded to my recent query about rigging
> tensions. Some very interesting and informative comments. I will
be
> looking out for a discount copy of Brion Toss' book at the Sydney
Boat
> Show next week.
>
> I must now admit that we are a little way off actually adjusting the
> tension.
>
> We pulled the mast last week and managed to transport it to our
house
> courtesy of a devious support structure constructed from 2 x 4
lumber
> mounted on a box trailer behind our car. We don't live very far
from
> the jetty. I wouldn't have believed an 11.25m mast would weigh so
much.
>
> It weighs less now as we have stripped everything off that it
moveable
> and is sitting on trestles in the garden.
>
> The main reason for taking it off was the masthead fitting in which
the
> sheaves had securely seized themselves and defied all attempts by
> bosun's chair and various penetrating oils to free them.
>
> While we have the mast off we will re-rig. Hence the (perhaps
> premature) questions about rig tensions. The existing s/s rigging
was
> installed in 1979 far as we can tell.
>
> A previous owner had installed a VHF aerial with the wire clipped
to the
> outside of the mast. We want to run this internally and make
provision
> for HF while we're at it. We'd also like to fit a masthead
tricolour so
> will need to add some wiring for that. I don't think our budget
will
> stretch to flash electronics at the masthead.
>
> Does anyone having any hints/references for in-mast wiring? I
recall
> seeing somewhere that wiring should be installed in a conduit. But
what
> stops the conduit form flopping about inside the mast?
>
> The mast is painted and in need of a new coat. Someone suggested
that
> we just rub it back to bare aluminium and leave it at that. We are
> worried that if we do that then any anodising will be destroyed and
> corrosion will run rampant.
>
> Any views, suggestions, comments etc on the foregoing would be
greatly
> appreciated.
>
> Graham and Lesley Bannister
> s/v Southern Aura
> Australia
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