Glossary

This glossary contains information on terms, phrases and abbreviations used by the Aviation industry. While this list does not include all aviation terminology, it is the purpose of this glossary to aid the general viewer in better understanding aviation terms as it pertains to content on this website. A full list of aviation terminology can be found here.
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W

Winds and temperature aloft forecast (FD).

A twice-daily forecast that provides wind and temperature forecasts for specific locations in the contiguous United States.

Wing area.

The total surface of the wing (in square feet), which includes control surfaces and may include wing area covered by the fuselage (main body of the airplane), and engine nacelles.

Wing span.

The maximum distance from wingtip to wingtip.

Wing twist.

A design feature incorporated into some wings to improve aileron control effectiveness at high angles of attack during an approach to a stall.

Wings.

Airfoils attached to each side of the fuselage and are the main lifting surfaces that support the airplane in flight.

Wingtip vortices.

The rapidly rotating air that spills over an airplane’s wings during flight. The intensity of the turbulence depends on the airplane’s weight, speed, and configuration. Also referred to as wake turbulence. Vortices from heavy aircraft may be extremely hazardous to small aircraft.

Work.

A measurement of force used to produce movement.

World Aeronautical Charts (WAC).

A standard series of aeronautical charts covering land areas of the world at a size and scale convenient for navigation (1:1,000,000) by moderate speed aircraft. Topographic information includes cities and towns, principal roads, railroads, distinctive landmarks, drainage, and relief. Aeronautical information includes visual and radio aids to navigation, airports, airways, restricted areas, obstructions and other pertinent data.