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technique used on this project to construct the hull is plank on frame.
This method of hull construction involves creating a skeleton that is
then covered with individual strips of wood to form the shape of the
hull. This technique requires patience, skill and accuracy to produce
the hull. |
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| Stage
7
The first
stage of planking was to calculate the taper of each plank from bow to
stern. First find the widest frame on the model and measure from the
keel to the deck level. On this model the measurement was 200mm.
Each of the planks to be used was 10mm wide so at the widest point of
the hull 20 planks are needed. (200 divided by 10mm equals 20). Next
measure the remaining frames and note down each measurement. Each
measurement is then divided by 20 to give the plank width at each frame.
The frames are then marked with the width of each plank. |
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Each plank is pinned
and clamped |
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 The
first stern
planks tapered to shape and pinned in place |
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Stage
8
Some
areas of the hull are flat so I skinned them with 2mm thick lime wood
sheet, cut to follow the lines of the tapered planks. This was quicker
than using individual planks. I started to plank from the keel at the
bow cutting each plank to the required taper. When planking the
hull I work on either side, to avoid stressing and warping the keel, by
laying only two planks on each side at a time. Once I had completed up
to the bilges I continued with the stern planking. Each plank is shaped,
soaked with a small amount of water to allow easy bending, and glued in
place with wood adhesive. The plank is pinned in place until the glue as
set. |
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| Stage
9
The work
proceeds relatively slowly but care must be taken in shaping each plank
to obtain the correct fit on the frames. Being patience at this stage
and working methodically will result in a hull that is accurate
and a good building block for the rest of the model. Where I have
over run the plank on the last frame they can be trimmed back and the
ends sanded flat with the frame. |
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Half of the stern
planking complete |
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Stern planks installed
working from the deck level |
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Stage
10 Next
I started to work from the deck level of the hull to meet up with the
planks already in place. I found this an easier way of working.
The curvature at the stern is quite sharp and therefore the edges of the
planks had to be bevelled to eliminate any gaps between. |
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| Stage
11
Returning
to the bow of the hull, again working from the deck level, the bow
section was completed. The next thing was to mark the positions of the
bow thruster units on the wooden blocks. Once marked I used a 25mm
diameter wood spade drill to cut out the openings. Now I could
start to shape the bow blocks using an electric detail sander. |
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Bow showing completed
planking |
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 Bow showing
bow thruster holes drilled out |
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Stage
12
The last
stage of the hull construction can be the most time consuming. The
planking needs to be sanded to a smooth finish. Using the electric
detail sander with a medium grit sanding pad, I started to sand the
entire hull, removing the high spots and continuing until an even finish
was obtained. Next I filled any gaps with wood filler and sanded
that smooth. This completes the basic hull of the model.
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