A sprocket wheel on the windlass for taking links of the chain cable.

Value of soil moisture, expressed as a percentage of the mass of dry soil, below which a plant living in the soil dies by wilting.

An air operated device for hoisting or pulling. Similar to a slusher or tugger or An engine for handling drafts of cargo secured on deck and fitted with drums on a horizontal axle.

Air in motion relative to the surface of the earth. Almost exclusively used to denote the horizontal component.

Same as wind sock.

The direction from which the wind is blowing, measured in points of the compass or in azimuth degrees.

Energy available from the movement of the wind across a landscape caused by the heating of the atmosphere, earth, and oceans by the sun.

An apparatus for converting the energy available in the wind to mechanical energy that can be used to power machinery (grain mills, water pumps) and to operate an electrical generator.

A WECS designed to produce electricity.

See gust and peak gust.

The distance or length of flow of the air past a point during a given interval of time.

A group of wind turbines interconnected to a common utility system through a system of transformers, distribution lines, and (usually) one substation. Operation, control, and maintenance functions are often centralized through a network of computerized mo ...

The process of characterizing the wind resource, and its energy potential, for a specific site or geographical area.

A diagram that indicates the average percentage of time that the wind blows from different directions, on a monthly or annual basis.

A flower-like diagram indicating the relative frequencies of different wind directions for a given station and period of time.

The distance or length of flow of the air past a point during a given interval of time.

A local variation of the wind vector or any of its components in a given direction.

Same as windsock.

A fabric cone attached to a metal ring and used to indicate wind direction. often at airfields.

The rate of flow of the wind undisturbed by obstacles.