Definition
A registered trademark for a complete aircraft fabric covering system that uses heat-shrinkable polyester (Dacron) cloth bonded to the airframe with vinyl-based cements and finished with vinyl coatings rather than traditional dope. The system is FAA-approved under STC and is widely used to recover fabric aircraft.
Plain English
A brand-name kit for covering a fabric airplane. It uses polyester cloth and special vinyl glues and coatings, all designed to work together as one approved system.
Context Anchor
Seen in aircraft maintenance, restoration, logbook entries, and repair instructions for fabric-covered airplanes.
Derivation
The name combines 'poly' (from polyester, the synthetic fiber used in the cloth) and 'fiber' (the cloth itself). It signals that this system is built around polyester fabric rather than the older cotton or linen.
Why Pilots Care
Fabric covering systems are not interchangeable. Each system (Poly-Fiber, Ceconite, Stits, etc.) is approved as a complete process, and substituting materials between systems can void the airworthiness of the covering job.
Intuition Check
Poly-Fiberâ® does not mean any plastic fiber or any fabric covering. Here it refers to a specific branded aircraft covering system with its own materials and instructions.
Example Sentence 1
The Champ was recovered last winter using the Poly-Fiber system and looks like new.
Example Sentence 2
Many builders select Poly-Fiber® because it resists rot better than traditional cotton fabric.