Experiments with Models of a Surface Trawl Net for Fishing Salmons
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概要
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The best form for fishing salmons of a surface trawl net to be used with two boats was searched for with the models constructed according to TAUTI'S principle. After various improvements, a form was obtained, with which the net assumes the shapes as shaown in Fig. 4. In Fig. 4, the speed of dragging the net corresponds to 1/2. 1 and 11/2 miles per hour in A, B and C respectively; the distance between the two boats, to 73, 61, 49and 36•2 F respectively from left to right in each row; while the length of two ropes attached to the net, to 40 and 40 F in the upper row, 40 and 45 F in the middle and 40 and 50 F in the lower ?ow.