Plain English Meaning
A wire, cable, or rod that holds a part of an aircraft steady by stopping it from moving or flexing under load.
Full Definition
A structural support, typically a wire, cable, rod, or rigid member, used to hold a part of an aircraft or airship in position by resisting tension or compression loads. Stays are commonly found bracing wings, control surfaces, landing gear, and the framework of lighter-than-air craft.
Context Anchor
Seen in aircraft structure and maintenance descriptions, especially on aircraft with visible support wires or braces.
Derivation
From the Old English 'stæg,' a nautical term for a rope supporting a ship's mast. The aviation use carries the same idea: a tensioned line or rod that keeps a structural piece in its proper position.
Why Pilots Care
A damaged or loose stay can mean a supported part is no longer being held correctly, so it should be inspected before flight.
Analogy
A stay is like a support line on a tent pole: it may look simple, but it helps keep the larger structure in the right position.
Intuition Check
Do not read stay here as the everyday verb meaning “remain.” In aircraft structure, a stay is a physical support or brace.
Example Sentence 1
The mechanic inspected each stay on the biplane's wing for signs of corrosion or fraying.
Example Sentence 2
Loose tail stays can allow the stabilizer to shift and affect pitch control.