What defines a cantilever wing?

A cantilever wing is defined by having sufficient internal support structures that allow it to support itself without the need for external bracing or struts. This design relies on the internal framework of the wing, which typically includes spars, ribs, and skin, to handle aerodynamic forces. The absence of external support allows for a cleaner aerodynamic shape, contributing to improved efficiency and performance, especially in high-speed aircraft.

This design is frequently found in modern aircraft due to its advantages in aerodynamics and structural strength. Cantilever wings are particularly advantageous for their lighter weight and reduced drag, making them suitable for various types of aircraft, including commercial airliners, military jets, and many others.

While other options mention external structures or design characteristics like thickness, they do not pertain to the fundamental definition of a cantilever wing. The design's reliance on internal structures makes it distinct and integral to understanding aircraft wing configurations.