60 Engineering Fundamentals
To create a cone, an ellipse is drawn in the
bottom of the box and lines are drawn from the
top center point to each end of the ellipse. See
Figure 4-7.
Outline the Solution
Creating a detailed outline is the next step
of completing a sketch. Engineers use many
different lines when creating sketches, includ-
ing outline lines. An outline is the basic shape
of the object. Outline lines are removed from
the sketch, leaving object lines to appear on the
fi nal drawing. Outlines are drawn very lightly
because all the lines will not be included in
the fi nal sketch. Engineers know they will add
and remove many lines before the drawing is
complete. See Figure 4-8.
Detail the Solution
Details are the fi nal component added to a
sketch. The details include all the components
of a design that are not a part of the main shape
that was blocked using boxes, cylinders, and
other shapes. See Figure 4-9. Details may include
curved shapes of a car, the strings on a guitar, or
the company name on a television.
Step 1
Step 2
Step 3
Step 4
Step 1
Step 2
Step 3
Step 4
Pyramids and cones are sketched using the steps shown.
Figure 4-7.
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Figure 4-8.
A sketch of a guitar is first
blocked out using boxes and
cylinders. Then, an outline
of the guitar is created,
showing the external shape.