抄録
A trial construction of a drag-type current meter is introduced. Though this current meter has not been applied in real ocean, the technique used there would give good suggestions for future developments of new types of current meters. Besides, a curious directional characteristics is found for the current meter with a four bolts cage. The output increases with increase of the relative angle of the meter to the current direction up to 20°, and the maximum output occurs at about 20°. A simple model is proposed to understand this directional characteristics. Then, the current meter with a 12 bolts cage is recommended as its directional characteristics can be well represented by a cosine curve.
