巾着網の研究―I
締結速度について
1966 年 32 巻 6 号 p. 507-510
詳細
1966 年 32 巻 6 号 p. 507-510
A series of experiments on the purse seine was carried out by model net. In this paper, the author analyzed the influence of pursing velocity during the pursing operation.
The model net and the apparatus used in this experiments are shown in Figs. 1 and 2.
The results obtained are summarized as follows:
(1) When the pursing operation is done fast in the case of A (Fig. 1), the corks of the bunt section are pulled into the water at the final stage of the pursing operation. However, in the cases of B and C (Fig. 1), the corks do not sink and the netting is kept in a normal form.
(2) The tension of purseline during the pursing operation is summarized in Fig. 6 and the relations between the pursing velocity (v) and the tension (T) of purseline are shown as T=av (Fig. 7).
