Definition
Streamlined coverings fitted over an aircraft's wheels and landing gear struts to reduce aerodynamic drag in flight. Sometimes called wheel pants, they smooth the airflow around the otherwise blunt, drag-producing wheel and tire, improving cruise speed and fuel efficiency on fixed-gear aircraft.
Plain English
Smooth covers fitted over the wheels of a plane so the air flows past them more cleanly. They make the plane slip through the air with less resistance, so it flies a little faster and uses a little less fuel.
Context Anchor
Seen in aircraft performance charts and equipment notes, especially when a chart assumes the airplane has wheel fairings installed.
Derivation
A 'fairing' is anything added to a structure to make its shape smoother for the air to pass over -- from the older sense of 'fair' meaning smooth or clean. So a wheel fairing is simply the smooth shell that cleans up the airflow around the wheel.
Why Pilots Care
They improve climb performance and cruise efficiency by lowering total drag.
Intuition Check
Wheel fairings are not just decorative wheel covers. In this context, they are shaped covers that reduce air resistance and can change the airplane’s performance.
Example Sentence 1
Before takeoff, the pilot checked the tire pressures through the inspection openings in the wheel fairings.
Example Sentence 2
Cruise charts often assume the aircraft is equipped with wheel fairings to achieve listed speeds.