Técnic of Drawing:
on pictures to enlarge
of us who have an attachment to maritime modeling often, when we go for some
of our beaches, we see some boats that we would like to build. We look at it and remember it, however, we do not know how to do it to get an
This modest treaty, in the form of a summary, will try to solve this fault and
will make you (a skilled reader) a good naval technician.
first thing to do is go to the boat in question, take the sizes of the total
sleeve, the maximum height from bow to stern and the center, which will be
the minimum. Once
in your house, you will make the utensil to the size of the boat under study.
A and B. In cases of large-sized and decked vessels, the sizes can be taken
outside as shown in Fig. C). The
widget, according to the drawing that is attached, will be of a rule a
little longer than the hose of the boat, and another slightly longer than
the height of the bow, which will be joined at 90 ° angle. (See
fig. 1, num. 10). The
vertical rule will guide some 10 or 20 cm to support a regulated wood (in
the form of a tape measure) to take the measures.
make the description we use a "gussi" model of a length of 4.18 m.
In the field drawing no. 1 you can see that we take the measurements on the outside either by Cartesian
that we will need: an utensil such as the one described, cord, roll of
adhesive paper of 1 cm in width, a meter, a tape measure, a plumb, staircase,
notebook and pencil. If it's windy it's good to bring white cards of a foliage format, which did
not fit so much.
Work field. We
have reached the beach and we are in front of the boat. First
we will put the cord tied from bow to stern in the manner indicated in
drawing no. 1.
Next we will draw the profile of the boat in an approximate way. We
will divide the length of the boat on the cord already placed and properly
stretched so that the divisions fall onto the center of the quadrants
1,2,5,8,11,14 and 15. If you take notice you will see that both bow As
aft the sizes are taken together for the great aftertaste that ships on both
centers on the cord will mark them with small slips of gummed paper. We
will take strips of the same paper in the center of these notebooks (see
drawing) from the keel to the edge of the boat properly grounded to follow
the center of the remainder. With these instructions we will have the boat ready to take the corresponding
What is a map of lines? The
plane of lines of the ship is the descriptive element, which graphically
demonstrates the characteristics of its forms. It
consists of three projections: longitudinal, transversal and horizontal,
which must be made on a scale to allow the lines to be obtained easily and
confidently. The lines will rectify one another and move them to other papers or directly
to the wood to build the ship.
Before that, however, we will explain the three projections, which shape the
profile projection. The
plane of lines represents, in the longitudinal projection, the profile of
the ship of the ship. In addition to its contour, the waterline is determined in it and a series of
parallel lines called lines of water, evenly spaced, which are indicated
from the bottom up with numbers from 1 onwards.
waterline and the water line beneath it, are drawn with continuous traces. Those
that are above the waterline are fake and are represented with interrupted
or discontinuous traces. (See the drawings of field numbers 2 and 3).
longitudinal profile also shows the cross sections, which correspond to the
drawing frames, represented by lines perpendicular to the daigua lines. They
are usually separated by equal distances and numbered starting from the left.
projection also shows curved lines that correspond to the profiles of the
vertical or longitudinal sections, which we will see now represented in the
horizontal projection and that are indicated with Roman characters. (See drawing field number 4 plane in longitudinal forms.)
Horizontal or plant
is usually drawn below the longitudinal projection the horizontal, which
corresponds to the representation of the ship seen from above. Figure in this projection the cross sections, as an extension of those
indicated in the longitudinal projection.
a line of cruxia or symmetry axis, directed from the middle part of the
stern, to the point of convergence of the bow and parallel to it, we
appreciate the vertical sections, which correspond to perpendicular cuts to The
water lines. The
limits of these, when cutting the ship, produce the curved lines, marked
with Roman numerals already mentioned in the projection vertigo.