Abstract
An experimental anemometer with three semi-circular cylindrical shells with open ends is tested, in wind tunnel of its rotational speed in tilted attitudes. This is to clarify the proposal of I. FUJIMURA to install such type at mountain stations to be free from strong up-wash effect of wind often encountered.
The results are disappointing and the standard three-cup anemometer is found to give rather constant rotational speed despite of up-wash or down-wash.
