2026-03-09T00:20:44Z https://fra.repo.nii.ac.jp/oai

oai:fra.repo.nii.ac.jp:02007754 2026-03-06T05:36:38Z 12:14:1716955731445

円型オッターボードの性能について Characterristics of a Saucer Shaped Board Koyama, Takeo 3520 小山, 武夫 コヤマ, タケオ Oba, Osamu 大場, 修 オオバ, オサム Experiment to investigate the performance of saucer shaped board was conducted with 50 G/T stern trawler "TAKAMARU" at Tokyo Bay where water depth is around 20~30 meters, and have come up with the following result. 1) Sheer coefficient (CL) and Drag coefficient (CD) for Saucer shaped board were obtained approximately 1.2 and approximately 0. 73 respectively, thus it was proved that there's almost no change in performance and capability for this board as compared with cambered trawl board of conventional type. 2) It was confirmed that this board was never fell down against meeting rudder at the degree of 50°. Consequently, this board will be very suitable for fishing ground where is nallow and rough bottoms. 3) It was also confirmed that this board was well fittabble to the gallows and was proved to be extremly easy for handling in operation. departmental bulletin paper 水産工学研究所 National Research Institute of Fisheries Engineering 1984-03 水産工学研究所報告 5 217 223 Bulletin of National Research Institute of Fisheries Engineering AN00332937 0388-9718 https://fra.repo.nii.ac.jp/records/2007754 jpn nrife_k_5_217 日本農学文献記事索引(agriknowledge) https://agriknowledge.affrc.go.jp/RN/2010302341 metadata only access