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ANEMOMETRY SPECIALISTS INC

including Robert Hooke (1635–1703) · developed their own versions · with some mistakenly credited as its inventor. In 1846 · Canadian meteorologist John Patterson (1872–1956) developed a three-cup anemometer · which was improved by Brevoort and Joiner in 1935. In 1991 · Derek Weston added the ability to measure wind direction. In 1994 · Andreas Pflitsch developed the sonic anemometer. &#91 · 1 &#93 · the wind always has the hollow of one cup presented to it · &#91 · 2 &#93 · torque is generated on the anemometer's axis · causing it to spin. Theoretically · in practice · other factors influence the rotational speed · including turbulence produced by the apparatus · increasing drag in opposition to the torque produced by the cups and support arms · and friction on the mount point. When Robinson first designed his anemometer · he asserted that the cups moved one-third of the speed of the wind · but it was incorrect. Instead

ALTA, IA 51002

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including Robert Hooke (1635–1703)
developed their own versions
with some mistakenly credited as its inventor. In 1846
Canadian meteorologist John Patterson (1872–1956) developed a three-cup anemometer
which was improved by Brevoort and Joiner in 1935. In 1991
Derek Weston added the ability to measure wind direction. In 1994
Andreas Pflitsch developed the sonic anemometer. &#91
1 &#93
the wind always has the hollow of one cup presented to it
&#91
2 &#93
torque is generated on the anemometer's axis
causing it to spin. Theoretically
in practice
other factors influence the rotational speed
Learn more
including turbulence produced by the apparatus
increasing drag in opposition to the torque produced by the cups and support arms
and friction on the mount point. When Robinson first designed his anemometer
he asserted that the cups moved one-third of the speed of the wind
but it was incorrect. Instead

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102 S MAIN ST

ALTA, IA 51002

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