TITLE:
Anemometer Modified
AUTHORS:
Kern E. Kenyon
KEYWORDS:
Anemometer, Modification
JOURNAL NAME:
Natural Science,
Vol.11 No.2,
February
2,
2019
ABSTRACT: A
four cup commercial anemometer is modified as follows. Two cups with arms
extending from the pivot are removed. The other two half spherical cups are
re-placed by identical double cones, each of which is composed of two cones of
different altitudes joined at the bases that are the same size. There is a
stiff wire connecting the two double cones to the pivot at the midpoint so they
are free to spin in the horizontal plane. They are parallel but oppositely
oriented. When a fan is turned on aiming an air stream toward the double cones,
they constantly rotate. Increasing the distance between the long axes of the
two double cones causes the rotation rate to increase for the same setting of
the fan. These results are qualitatively explained by reaction forces of a
flowing fluid acting on the surfaces of solid bodies with front to back
asymmetry in accord with Newton’s 3rd law (action equals reaction) published by
the author earlier. Besides calibrating the modified anemometer for measuring
wind speed, another practical application of the concept may be the generation
of electricity by the natural winds.