Plain English Meaning

Sharply curved sections of the metal skin where the curve is tight and concentrated in one small area, rather than gently spread across a wide surface. The tight curve makes the panel stiffer.

Full Definition

Tight, sharply curved bends formed into the metal skin of an aircraft structure — typically along leading edges or fairings — where the radius of curvature is small and the curve is concentrated over a short distance. These tight bends stiffen the panel and help it hold its aerodynamic shape under load.

Context Anchor

Seen when learning about the structure and inspection of outer wing surfaces and tail sections.