Definition
A structural member used to stiffen or support a framework by resisting compression, tension, or both. In aircraft construction, braces are used to strengthen wings, fuselage structures, and landing gear assemblies against bending and twisting loads.
Plain English
A part added to a structure to keep it rigid and stop it from bending, flexing, or collapsing under load.
Context Anchor
Seen in airframe structure, aircraft maintenance, and inspection descriptions.
Derivation
From the Old French 'brace' meaning 'two arms,' which came from the Latin 'bracchia' (arms). The idea is the same as a person bracing themselves with their arms — the part holds something steady against a force trying to move it.
Why Pilots Care
Using the correct brace position measurably lowers the chance of head, neck, and spinal injuries in survivable accidents.
Analogy
A brace on an aircraft works like a support piece under a shelf: it is not the main surface, but it helps keep the surface from sagging or shifting.
Intuition Check
Brace does not mean the emergency position a passenger takes before impact here. In this context, it means a physical support member in the aircraft structure.
Example Sentence 1
The wing of the Piper Cub is supported by a steel brace running from the lower fuselage to the underside of the wing.
Example Sentence 2
Passengers were told to brace by folding forward and covering their heads with both hands.