What is the primary purpose of an auxiliary view in orthographic drawings?

The primary purpose of an auxiliary view in orthographic drawings is to display the true shape and length of inclined surfaces. In standard orthographic projections, certain angled or inclined surfaces can appear distorted or foreshortened, making it difficult to accurately interpret their dimensions and characteristics. By using an auxiliary view, which is projected from one of the principal views at an angle that aligns with the inclined surface, designers and engineers can accurately show the true shape and dimensions, providing a clearer representation that helps in understanding and manufacturing the part or assembly.

This technique is essential in engineering and design fields, particularly in aviation structural mechanics, where precision in the representation of components is crucial for safety and functionality. The accurate portrayal of inclined surfaces can therefore facilitate better communication among engineers, machinists, and assembly teams.