"The Process Of Building The Paper Shell-Boat
Is As Follows:
The dimensions of the boat having
been determined upon, the first step is to
construct a wooden model, or form, an exact
facsimile of the desired boat, on which to mould
the paper skin.
For this purpose the lines of the
boat are carefully drawn out of the full size, and
from the drawings thus made the model is
prepared. It is built of layers of well-seasoned
pine, securely fastened together to form one solid
mass; which, after having been laid up of the
general outline required, is carefully worked off,
until its surface, which is made perfectly smooth,
exactly conforms to the selected lines, and its
beam, depth, and length are those of the given
boat. During the process of its construction,
suitable rabbets are cut to receive the lower
keelson, the two inwales, and the bow and stern
deadwoods, which, being put in position, are
worked off so that their surfaces are flush with
that of the model, and forming, as it were, an
integral part of it. It being important that these
parts should, in the completed boat, be firmly
attached to the skin, their surface is, at this part
of the process, covered with a suitable adhesive
preparation.
"The model is now ready to be covered with
paper. Two kinds are used: that made from the
best Manila, and that prepared from pure
unbleached linen stock; the sheets being the full
length of the model, no matter what that may
be. If Manila paper is used, the first sheet is
dampened, laid smoothly on the model, and
securely fastened in place by tacking it to
certain rough strips attached to its upper face.
Other sheets are now superposed on this and on
each other, and suitably cemented together; the
number depending upon the size of the boat and
the stiffness required. If linen paper is used, but
one sheet is employed, of such weight and
dimensions that, when dry, it will give just the
thickness of skin necessary. Should the surface
of the model be concave in parts, as in the run
of boats with square sterns for instance, the paper
is made to conform to these surfaces by suitable
convex moulds, which also hold the paper in
place until, by drying, it has taken and will
retain the desired form. The model, with its
enveloping coat of paper, is now removed to the
dry-room. As the paper skin dries, all wrinkles
disappear, and it gradually assumes the desired
shape. Finally, when all moisture has been
evaporated, it is taken from the mould an exact
fac-simile of the model desired, exceedingly stiff,
perfectly symmetrical, and seamless.
"The paper is now subjected to the water-proof
process, and the skin, with its keelson, inwales,
and dead-woods attached, is then placed in the
carpenter's hands, where the frame is completed
in the usual manner, as described for wooden
boats. The paper decks being put on, it is then
ready for the brass, iron, and varnish work.
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