Definition
A composite material made from very fine glass fibers embedded in a plastic resin (typically epoxy or polyester), used in aircraft construction for non-structural and semi-structural components such as wingtips, fairings, fairing tips, radomes, and tail cone caps because it is light, strong, and easily molded into curved shapes.
Plain English
A lightweight material made by mixing thin strands of glass with plastic to form a tough, smooth shell. Many of the curved, non-load-bearing parts of a small aircraft — like wingtips and the cap on the tail — are made from it.
Context Anchor
Seen when studying aircraft construction and when inspecting outer wing surfaces, wingtips, covers, or tail section parts during preflight.
Derivation
The name is literal: glass drawn into fine fibers. The idea came from making glass thin enough to bend without breaking, then binding those fibers together with resin to gain strength in any shape.
Why Pilots Care
Fiberglass provides high strength at low weight, improving performance and requiring specific techniques to detect and repair damage such as delamination.
Intuition Check
Do not think of fiberglass as ordinary window glass. In aircraft use, it is a light, shaped material made from tiny glass strands held in a hard plastic-like base.
Example Sentence 1
The pilot inspected the fiberglass wingtip for cracks during the preflight walkaround.
Example Sentence 2
After impact, the pilot inspected the fiberglass tail section for cracks before the next flight.