2 0 0 0 OA 貨物船の船型に關する系統的模型試驗
- 著者
- 重光 蔟 山縣 昌夫
- 出版者
- The Japan Society of Naval Architects and Ocean Engineers
- 雑誌
- 造船協會會報 (ISSN:18842054)
- 巻号頁・発行日
- vol.1932, no.50, pp.121-152, 1932-10-30 (Released:2009-07-23)
To study the effects of fore-body form, longitudinal distribution of parallel middle body and breadth of cargo ships upon the resistance and mean annular wakes at the position of screw propeller, seventeen models are tested at Teishinsho Experiment Tank, and the results obtained are compared.
1 0 0 0 過去四十年間に於ける本邦商船の發達
The author first deals with the vicissitude of the Japanese tonnage in the past and that of the shipbuilding in dustry, the lists of the particulars of the vessels with special features built during such period being also given.Under the heading of "the Measures taken by the Government for the-Japanese Shipbuilding, " the provisions for the exemption of the customs duties regarding to the articles for marine uses, the subsidy system for the encouragement of manufacturing steel for ship construction, the marine loan system and the system of the governmental permission for importing operable ships, are described, and also the contents and results of the provisions for facilitating the improvement of ships are explained. Then the author discusses the development of marine engines in Japan, pointing out the fact that the fuel consunption at the same power has been lowered up to sixty per cent in comparison with that in ten or more years ago. Further, he deals with the model tests of ships and their effects, and explains that the shaft horse power required for the operation of the same ship at the same speed has been reduced to seventy percent of that in old time. Thus, the progress of Japanese shipbuilding technique, by which the fuel consumption of ships has been reduced by at least one-half in total, is clarified.