This report describes the research and development effort involved in creating an instrument capable of measuring the speed and direction of winds ranging from 1 to 50 ft per sec at any selected point between 0 and 1000 ft above the earth's surface.
The sensitive instrument element was an electrically heated Thermistor rod producing an electrical signal variation as a result of the convective cooling action of the measured wind. The electrical signal from the elevated instrument station was conveyed
to the ground indicator station by a transmission cable. The instrument was stabily supported and selectively positioned in the wind by a tethered kite-type balloon.
Prepared Under Signal Corps Contract No. DA-36-039 SC-56694, Signal Corps Project No. 172-B, Department of Army Project No. 3-99-07-022 U. S. Army Signal Corps of Engineering Laboratories
Ripken, John F.; Killen, John M..
Research and Development Studies for a Low-Level Wind-Measuring System.
St. Anthony Falls Hydraulic Laboratory.
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