Page:Dictionary of aviation.djvu/278

 254 DICTIONARY OF AVIATION

wind-object 'wind,obd3ikt n. an object designed to act in or against the wind; an aerofoil or the like.

wind-pocket 'wind,pekit n. a pecket or receptacle in a kite or aeroplane, designed to catch the wind or air and aid in preserving the equilibrium of the craft; a small windbag.

wind-pressure 'wmd,pse$92: n. the pressure of the wind upon any object in its path.

coefficient of windf pressure, the coefficient or numerical constant used as a mesure of the pressure of the wind against a stationary object, or of the resistance of the air to a moving object.

wind-pulsation 'wind-pAl,see-$9n n. a pulsation, throb, or beat of the wind; the pulsation or throbbing of the wind, a wind^pulse : as, harmonic *wind?pulsation.

wind-pulse 'wind,pAls n. a pulse or throb of the wind; a wind^pulsation.

wind-rate 'wind,zeet n. the rate of wind^movement; the comparativ degree of rapidity of a wind; wind^velecity ; wind^speed.

wind-record 'wmd^ekazd n. a record of wind velocities or directions, as by an anemograf; an anemogram.

wind-register 'wmd^edsi-stse n. an instrument for regi- stering or recording the direction and force of the wind; an anemograf.

wind-river 'wind/zivaz n. a river or definitly defined cur- rent of wind; a long, stedy atmosferic stream or current flowing between certain points : as, the mighty *wmd#nver formd by the Rhine valley.

wind-rose 'wind,zooz n. a table, diagram, or grafic device of radial or rosette^like form indicating the relativ fre- quency of winds blowing from different points of the compass or the relativ amount of total wind^movement in each direction; a wind^star; also, a similar table or dia- gram showing the connection between the wind?direction and any other wether^condition, as cloudiness, rainfall, or temperature.

baric windtrose, a windfrose whose radii are proportional to, or show, for a given place, the average barometjic pres- sure of the atmosfere during the prevalence of wind from each point of the compass; a barometric winds=rose. barometric ivindtrose, same meaning as baric ivindzrose. humidity windtrose, a wind^rose whose radii are propor- tional to, or show, for a given place, the average relativ or absolute humidity or the relativ dew-point of the atmosfere during the prevalence of wind from each point of the com- pass.

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