Faa Vocab W, Z

Front 1

Wake turbulence.

Back 1

Wingtip vortices that are createdwhen an airplane generates lift. When an airplane generates lift, airspills over the wingtips from the high pressure areas below the wingsto the low pressure areas above them. This flow causes rapidlyrotating whirlpools of air called wingtip vortices or waketurbulence.

Front 2

Warm front.

Back 2

The boundary area formed when awarm air mass contacts and flows over a colder air mass. Warm frontscause low ceilings and rain.

Front 3

Warning area.

Back 3

An area containing hazards to anyaircraft not participating in the activities being conducted in thearea. Warning areas may contain intensive military training, gunneryexercises, or special weapons testing.

Front 4

Weather depiction chart.

Back 4

Details surface conditions asderived from METAR and other surface observations.

Front 5

Wind correction angle (WCA).

Back 5

The angle between the desiredtrack and the heading of the aircraft necessary to keep the aircrafttracking over the desired track.

Front 6

Wind shear.

Back 6

A sudden, drastic shift inwindspeed, direction, or both that may occur in the horizontal orvertical plane.

Front 7

Winds and temperature aloftforecast (FD).

Back 7

A twice daily forecast thatprovides wind and temperature forecasts for specific locations in thecontiguous United States.

Front 8

Wingtip vortices.

Back 8

The rapidly rotating air thatspills over an airplane’s wings during flight. The intensity of theturbulence depends on the airplane’s weight, speed, andconfiguration. Also referred to as wake turbulence. Vortices fromheavy aircraft may be extremely hazardous to small aircraft.

Front 9

Wing twist.

Back 9

A design feature incorporated intosome wings to improve aileron control effectiveness at high angles ofattack during an approach to a stall.

Front 10

Zone of confusion.

Back 10

Volume of space above the stationwhere a lack of adequate navigation signal directly above the VORstation causes the needle to deviate.