United States Department of Transportation
i
1991 LLWAS anemometer test program
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1992-01-01
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[PDF-3.87 MB]
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Edition:Final report; Nov. 1990 - Sept. 1991
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Abstract:Performance tests of anemometers under icing and snow conditions were conducted during 1990-1991 on the test field at
Rochester, MN and in icing chambers and wind tunnels at Sterling, VA. These tests were done for the FAA LLWAS program
to test sensors for the next phase of LLWAS.
Sensors from ten manufacturers were accepted into the test program from the respondents to the Commerce Business Daily.
These sensors were required first to pass an icing chamber test in order to be field tested. The field tests tasted
from November 1990 to July 1991. Afterwards, all sensors were sent to Sterling, VA for wind tunnel tests in September
1991.
Alt units from the eight manufacturers that passed the icing chamber test were in the field test. A propeller/vane
sensor that failed the icing chamber test was put in the field as a reference. All the units that passed were not
affected by icing during the field test although a mechanical unit was affected by snow during one event. The
propeller/vane was affected by icing during one event. Wind tunnel tests were done to check starting thresholds and
calibration anomalies found in the field.
It was concluded that there is no one "winning" technology that could be found from the tests.
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