What are center lines in aircraft drawings typically composed of?

Center lines in aircraft drawings are typically represented by alternating long and short dashes. This distinctive line style is used to indicate the center of an object, such as a component or structure, which is crucial for understanding the symmetrical aspects of design. The use of alternating dashes provides a clear visual distinction between center lines and other types of lines in technical drawings, ensuring that technicians and engineers can accurately interpret the design and layout of components.

The choice of using alternating long and short dashes is a standardized drafting convention that enhances clarity and helps maintain uniformity in engineering drawings. This helps prevent misunderstandings in the construction and assembly processes, which is critical in the aviation industry where precision is paramount. By properly marking center lines, the drawings convey important information about alignment and assembly that is essential for the structural integrity and function of the aircraft.