What is a characteristic of a cantilever wing structure?

A cantilever wing structure is characterized by its design, which allows it to support its own weight and the loads it carries without the need for external bracing. This type of wing is designed to attach directly to the fuselage, enabling a more streamlined and aerodynamic shape. The lack of external braces not only reduces drag but also simplifies the wing's construction and maintenance, making it a preferred choice in modern aircraft designs.

In contrast, options mentioning external braces refer to other types of wing structures that need additional support for stability and strength, which is not the case with cantilever wings. While older aircraft may have utilized various wing designs, the cantilever approach is prominent in more contemporary models, meaning that it is not solely characteristic of older aircraft. Lastly, while multiple spars can be a feature of some wing designs for structural integrity, the defining trait of a cantilever wing is its direct attachment to the fuselage without needing external supports.