Since These Boats
Are Subjected To Much Hard Service, And Must Be
So Constructed As To Permit The Occupant To
Move
about in them as is usual in such craft, a light
and strong frame of wood is prepared, composed
Of a suitable number of pairs of ribs, with stem
and stern pieces cut from the natural crooks of
hackmatack roots. These are firmly framed to
two gunwales and a keelson, extending the
length of the boat; the whole forming the
skeleton shape of the desired model. The forms for
these boats having been prepared, as already
described for the racing-shells, and the frame
being let into this form, so that the outer surface
of the ribs, stem and stern pieces will conform
with its outer surface, the paper skin is next laid
upon it. The skin, manufactured from new,
unbleached linen stock, is carefully stretched in
place, and when perfectly dry is from one-tenth
to three-sixteenths of an inch thick. Removed
from the model, it is water-proofed, the frame
and fittings completed, and the boat varnished.
In short, in this class of boats, the shape, style,
and finish are precisely that of wooden ones, of
corresponding dimensions and class, except that
for the usual wooden sheathing is substituted the
paper skin as described.
"The advantages possessed by these boats over
those of wood are:
"By the use of this material for the skins of
racing-shells, where experience has demonstrated
the smooth bottom to be the best, under-water
lines of any degree of fineness can be developed,
which cannot successfully be produced in those
of wood, even where the streaks are so reduced
in thickness that strength, stiffness, and
durability are either wholly sacrificed or greatly
impaired. In the finer varieties of 'dug-outs'
equally fine lines can be obtained; but so delicate
are such boats, if the sides are reduced to
three-sixteenths of an inch or less in thickness, that it
is found practically impossible to preserve their
original forms for any length of time. Hence,
so far as this point is concerned, it only remains
for the builder to select those models which
science, guided by experience, points out as the
best.
The paper skin, after being water-proofed, is
finished with hard varnishes, and then presents a
solid, perfectly smooth, and horny surface to the
action of the water, unbroken by joint, lap, or
seam. This surface admits of being polished as
smooth as a coach-panel or a mirror. Unlike
wood, it has no grain to be cracked or split, it
never shrinks, and, paper being one of the best
of non-conductors, no ordinary degree of heat
or cold affects its shape or hardness, and hence
these boats are admirably adapted for use in all
climates. As the skin absorbs no moisture,
these boats gain no weight by use, and, having
no moisture to give off when out of the water,
they do not, like wooden boats, show the effect
of exposure to the air by leaking. They are,
therefore, in this respect always prepared for
service.
The strength and stiffness of the paper shells
are most remarkable. To demonstrate it, a
single shell of twelve inch beam and twenty-eight
feet long, fitted complete with its outriggers,
the hull weighing twenty-two pounds, was
placed on two trestles eight feet apart, in such a
manner that the trestles were each the same
distance from the centre of the cockpit, which
was thus entirely unsupported. A man
weighing one hundred and forty pounds then seated
himself in it, and remained in this position three
minutes. The deflection caused by this strain,
being accurately measured, was found to be
one-sixteenth of an inch at a point midway between
the supports. If this load, applied under such
abnormal conditions, produced so little effect, we
can safely assume that, when thus loaded and
resting on the water, supported throughout her
whole length, and the load far more equally
distributed over the whole frame, there would be
no deflection whatever.
"Lightness, when combined with a proper,
stiffness and strength, being a very desirable quality,
it is here that the paper boats far excel their
wooden rivals. If two shells are selected, the one of
wood and the other with a paper skin and deck,
as has been described, of the same dimensions
and equally stiff, careful experiment proves that
the wooden one will be thirty per cent. the
heaviest. If those of the same dimensions and
equal weight are compared, the paper one will
be found to exceed the wooden one in stiffness
and in capacity to resist torsional strains in the
same proportion. Frequent boasts are made that
wooden shells can be and are built much lighter
than paper ones; and if the quality of lightness
alone is considered, this is true; yet when the
practical test of use is applied, such extremely
light wooden boats have always proved, and will
continue to prove, failures, as here this quality
is only one of a number which combine to make
the boat serviceable. A wooden shell whose
hull weighs twenty-two pounds, honest weight,
is a very fragile, short-lived affair. A paper
shell of the same dimensions, and of the same
weight, will last as long, and do as much work,
as a wooden one whose hull turns the beam at
thirty pounds.
"An instance of their remarkable strength is
shown in the following case. In the summer of
1870, a single shell, while being rowed at full
speed, with the current, on one of our
principal rivers, was run into to the stone abutment of a
bridge. The bow struck squarely on to
obstacle, and such was the momentum of the mass that
the oarsman was thrown directly through the
flaring bow of the cockpit into the river.
Witnesses of the accident who were familiar with
wooden shells declared that the boat was ruined;
but, after a careful examination, only the bow-tip
was found to be twisted in a spiral form, and the
washboard broken at the point by the oarsman
as he passed between the sides.
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