[Alberg30] dropping the mast...
George Dinwiddie
gdinwiddie at alberg30.org
Sun Oct 20 09:00:00 PDT 2002
No, the photos show the butt going aft. See
http://www.alberg30.org/maintenance/SparsSailsRigging/UnsteppingMast/9-TakeDownMast.html
where Mike walks the base aft along the side deck to the lazarette.
For the butt to go forward, you would have to rig the A frame in front
of the mast, since the mast has to swivel under the frame. The basic
idea is that you want a lifting point that's above the mast base when
the mast is vertical and near the balance point of the mast when it's
horizontal. You'll notice in those photos that in the initial lifting,
the force is taken by a cleat at the base of the mast. At the end, the
force is taken by the loop around the mast. Halfway in between, things
get a little dicey and you want to proceed smoothly and quickly (but not
hastily) through this phase.
I would not recommend taking your mast down yourself if you're just
referring to this article and haven't experienced doing it yourself.
There's a lot of things you need to do right and very little chance to
right a wrong once you lift the mast. Even after helping in this
process a number of times, I would be reluctant to do it without Mike
Lehman's help.
The first time we pulled our mast, Bob Montgomery led the operation and
we used the crossbeam of the travellift for the lifting point. Other
people use a gin pole or crane. Jim Palmer used to use a highway bridge
that he had to go under to get his boat home when he pulled it for the
winter. There's lots of ways of skinning this particular cat.
The rig breaks down approximately in half, so it's probably about 13
feet when broken down.
As for your mast foot casting, here's what Steve Weingart's article in
the Maintenance Manual says, "A local welder with aluminum experience
repaired/filled in the corners and finished the job that the previous
owner had started of sistering a 1/4" hard aluminum plate on the bottom
of the casting (he had tacked the plate on, but didn't fix the corners
leaving a very uneven surface for the bolts/washers to ride on). The
job only set me back $40 since I had the plate."
- George
Bill Blevins wrote:
> The photos on the Alberg 30 Web site show the butt going forward. Does it matter?
>
> Also, how long is the A frame when disassembled?
--
----------------------------------------------------------------------
George Dinwiddie gdinwiddie at alberg30.org
The gods do not deduct from man's allotted span those hours spent in
sailing. http://www.Alberg30.org/
----------------------------------------------------------------------
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