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The journal International Shipbuilding Progress (ISP) was founded in 1954. Each year four issues appear (in April, July, September and December). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as:
- Concept development
- General design of ships and offshore objects
- Ship and offshore structural design
- Hydro-mechanics and -dynamics
- Maritime engineering and machinery systems
- Production processes of all types of ships and other objects intended for marine use
- Production technology and material science
- Shipping science, economics, and all directly related subjects
- Ship operations
- Offshore and ocean engineering in relation to the marine environment
- Marine safety
- Efficiency, lifecycle, and environment
- Ice-related aspects for ships and offshore objects.
The contents of the papers may be of a fundamental or of an applied scientific nature and must be of the highest novelty and rigor.
Article Type: Research Article
Abstract: After a brief description of the velocity field induced by a propeller, the results obtained from open-water tests with systematically varied contra-rotating propellers of the B3-65 type are discussed. The results of these experiments are given in a B p − δ diagram. With the aid of this diagram it is possible to derive a satisfactory survey of the efficiencies of contra-rotating propeller systems. This diagram also supplies data concerning the optimum diameters and the pitch ratios of the front and rear propellers. An analysis with the aid of circulation theory of …the results of the experiments shows that with a distance of 0.37 D between front and rear propellers the axial induced velocity generated by the rear propeller is, in way of the front propeller, about 20 per cent. of the value it has infinitely far downstream of the rear propeller. Finally, a method based on circulation theory is developed by which contra-rotating propellers can be rapidly designed, provided they are of optimum diameter. Show more
Citation: International Shipbuilding Progress, vol. 3, no. 25, pp. 459-473, 1956
Article Type: Research Article
Abstract: This report presents and discusses some of the test data taken in the early part of 1955 during rough-water sea trials of a Coast Guard cutter on weather patrol duty. The data includes the impact pressures incident to slamming as well as the corresponding strains and deflections of the forward bottom plating. These measurements are compared with results obtained from theoretical considerations, and strength estimates are made for typical bottom plates of selected ships.
Citation: International Shipbuilding Progress, vol. 3, no. 25, pp. 474-486, 1956
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