Oblique Projection
An oblique projection is a 3D drawing of an object. It
shows the same three views as the 3rd Angle
projection. The side view is drawn first using the
same measurements as the 3rd angle. The end and
plan views are added in using a 45° set square.
Measurements on the diagonal lines are half size.
Page Layout
-
1cm Border
1cm Name Block
2cm Indent
Construction lines – use a sharp H
pencil and make the lines as light
as you can.
12cm – 120mm
4cm – 40mm
Object lines – Use the same
sharp H pencil but press harder
to produce a dark line. This will
mark the side view stand out
from the construction lines.
SIDE VIEW
Place the straight
edge of the set
square on the straight
edge of the parallel
motion and position
it over the corner of
the side view as
shown below
45° SET SQUARE
Draw a 45° from each corner.
45°
45°
45°
Remember in the oblique view the measurements on the diagonal
lines of the plan and end views are half their true measurement.
4cm – 40mm
PLAN VIEW
OBLIQUE PROJECTION – A 3D
(SOLID) DRAWING OF A 3D (SOLID)
OBJECT SHOWING THREE VIEWS,
THE SIDE, PLAN AND END. ALL
DIAGONAL LINES ARE 45°.
MEASUREMENTS ON THE
DIAGONAL LINES ARE HALF THEIR
TRUE DIMENSION.
PLAN VIEW
SIDE VIEW
Homework task - Toy car in Oblique Projection.
1)Page layout.
2)Oblique toy car – use the same toy car you drew for your 3rd Angle
Projection. Draw the car larger to fill more of the space. Show all the
details and render (colour) your drawing. Remember to judge the
proportion of the toy car so that the thickness looks realistic.