Pictorial Projections

Pictorial Projections provide a three-dimensional single image of the object, as if it were being viewed in perspective by eye (in a similar manner to a painting or a photograph).

FIGURE

The main types of pictorial projections may be considered as stated below.

• Parallel perspective projection: It is when one of the principal faces is parallel to the picture plane.
• Oblique projections: It is not normally used in aircraft engineering drawings, but may sometimes be used in maintenance or overhaul manuals, to provide initial images of uncomplicated components or to portray a general view of a constructional assembly.
• Isometric projections: These are the types mostly used for sketches and for the majority of images in maintenance and many other manual that are related to aircraft servicing.