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Transom bracket painted and installed (12-AUG-2004). Prior to installation, the brackets
and frame clips were sandblasted, primed with DuPont 2580CR self-etching urethane primer,
base-coated with Imron Urethane white and topcoated with Imron Urethane metallic silver.
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Fitting the sheer clamps to the breasthook. The breasthook was bulit up using
two pieces of 1" x 3" mahogany stock and 3/4" marine plywood. The strips will
provide a stable landing for the sheer clamp screws.
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Installing the sheer clamps. Two strips of 5/8" x 1-1/4"
mahogany will be used per side (07-SEP-2004).
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Although not detailed in the plans, the chine blocking was made
from two pieces of 3/4" marine plywood. The sides were
bevelled at 30 degrees and a notch was cut to fit around the stem.
This is definitely a trial and error project. Much time will be
saved when fitting the chine logs to the blocking.
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Glued . . .
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Screwed . . .
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Installed.
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The chine log was wrapped with waxed paper to prevent it from being glued to the blocking.
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Fitting the chine (14-SEP-2004).
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A large crescent wrench and a ratchet strap was used to twist
the top of the chine inward towards the keel. Laying a straightedge
from the sheer to the chine will indicate when sufficient twist is attained. (19-SEP-2004)
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The second sheer clamp laminations are yet to be installed. (06-JAN-2005)
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Notes on fitting the chine
Photo courtesy of Glen-L Marine Designs
The photo above illustrates a plywood fixture we have found helpful to determine the position of the chine on the stem side. Keep
in mind what has been stated in the foregoing. The bottom and side must mate to the stem and chine on a continuous surface. The
chine can't be located on the stem so that the stem/chine junction cannot be faired to a flat plane. Take small pieces of plywood and
simulate the side and bottom joining on the stem to help visualize what the finished junction will look like.
Source :
Designer's Notebook: Fitting the chine - WebLetter 49
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Fairing the stem and chine using the 'Rabl' method. The method is depicted in the following plate :
From the book Boatbuilding with Plywood by Glen L. Witt
For a complete description of the fairing method, follow the links below :
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