荒天時における大型トローラーの曳網力について

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This paper describes the results of comparative experiments on the pulling power of a large stern trawler (3400 gross ton 4000ps, made in Japan in 1967) which operated at a rough sea and calm one. Table 1 shows the specifications of the trawler used for the experiments, Table 2 shows the specifications of trawl gear and Fig. 1 the tension meter. Table 3 and Fig. 2 give the results of the experiments. According to Fig. 2 the relation between the shaft horse power (B. H. P) during towing and the pulling power (E. H. P) measured at the calm sea (Beaufort 2) is approximated by: E. H. P=0.3 (B. H. P) Through the experiments it has been established that in case the trawler heads wind at the rough sea the pulling power decreases by 40-50% as compared with that at the calm sea, but on the contrary it increases by 15-20% when the trawler heads leeward.
公益社団法人日本水産学会の論文