Definition
A descriptive phrase used in aviation reference material to describe the physical construction of certain flexible electrical conductors known as tinsel wire. The conductor consists of thin strips of tinsel or metal foil wrapped helically around a strong, flexible non-metallic center cord (commonly a textile fiber such as nylon or polyester). The cord provides tensile strength while the foil carries the electrical current, producing a wire that resists breakage from repeated flexing.
Plain English
It describes how a special kind of bendable wire is built: thin metal ribbon is wound around a tough string in the middle. The string keeps the wire from snapping when it bends a lot, and the metal ribbon carries the electricity.
Context Anchor
Seen in aircraft electrical maintenance when describing flexible cords, headset leads, microphone leads, or other wiring that is moved or bent often.
Derivation
Tinsel comes from the Old French estincele, meaning a spark or sparkle, later used to describe thin shiny metal strips. In this context, tinsel keeps that original sense of thin, flexible metal foil rather than the decorative Christmas meaning.
Why Pilots Care
Headset cords, microphone leads, and similar flex-prone wiring use this construction. Knowing why these cords are built this way helps a pilot understand why ordinary solid wire can't be substituted for repair, and why a damaged headset cord usually means replacement rather than splicing.
Intuition Check
Tinsel does not mean holiday decoration here. It means thin metal foil used as part of a flexible electrical wire.
Example Sentence 1
The headset cord is built from tinsel, or metal foil, wound around a strong, flexible center cord, which is why it can survive years of being coiled and uncoiled in the cockpit.
Example Sentence 2
Older aircraft radios often used tinsel conductors because the metal foil wrapped around the cord resisted fatigue from constant movement.