o be surmounted in designing a model yacht that
will sail in a straight line to windward,
irrespective of the different pressure that the
wind may expend on the sails, it must be pointed
out that the boat is continuously altering the
shape of the submerged part of her hull:
therefore, unless the hull is so designed that
harmony is retained at every angle to which the
pressure of wind on the sails may heel it, the
model's path through the water will be, more or
less, an arc of a circle. Whether the boat sails
toward the wind, or, in other words, in a curve
the center of the circle of which is on the same
side of the boat as the wind, or in a curve the
center of the circle of which is on the opposite
or leeward side, will depend upon the formation of
the boat.

As these notes are intended to first initiate the
reader into the subject of model yacht building
and construction, the design supplied is one in
which all things, as far as shape is concerned,
have been considered.

It is the endeavor of every designer to produce
the most powerful boat possible for a given
length--that is, one that can hold her sail up in
resistance to the wind-pressure best. Of course,
the reader will easily realize that breadth and
weight of keel will be the main features that will
enable the model to achieve this object; but, as
these two factors are those that tend to make a
design less slender, if pushed to extremes, the
designer has to compromise at a point when the
excess of beam and buoyancy are detrimental to the
speed lines of the hull.

But the question of design pure and simple is a
complex one, and we do not intend to weary the
reader just now with anything of that kind, so we
will now proceed to build the hull. In order that
we may correctly interpret the shape shown in the
design without being expert woodcarvers, we must
use our ingenuity and by mechanical means achieve
our object, at the same time saving ourselves a
large amount of labor, such as we should have to
expend if we made this boat from a so