バッチ網の模型実験

概要

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50 H. P. and 80 H. P. Batti-Ami (paranzella net for catching anchovy) which are being used in Ise Bay were studied by the model experiments. The scales of both nets were reduced to 1/15 of the full scales to Tauti's principle. The details of these nets are shown in Table 1, 2, and Fig. 1. The results obtained are shown in Figs. 2, 3, 4 and 5. From Figs. 2 and 3, the following are deduced concerning the full scale of nets. When the distance between the two-teamed boats is 200m and the pulling speed is about 0.8 mile/hour, that is, the longest pulling condition during one operation, each value of the mouth height and width of the bag net and the tension on the warp in the 50 H. P. are 9.2m, 11m, and 3.6 tons respectively. On the similar condition, they are 8.5m, 11.5m, and 4 tons pespectively, in the case of 80 H. P. In Fig. 6, a few records of the nets by the fish finder are represented. In point of the mouth height the result of the present experiments show approximately the same values as those obtained from Fig. 6.
社団法人日本水産学会の論文