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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.
Authors: Clements, R.E.
Article Type: Research Article
Abstract: This paper describes a method of analysing service-performance data devised at The British Shipbuilding Research Association, by means of which it is possible to estimate the effect of weather and deterioration of the hull and propeller surface on the shaft horsepower necessary to maintain a given speed. A method of multiple-regression analysis is used to obtain the separate effects of adverse weather, and of fouling. It is shown how a suitable weather scale has been evolved by which it is possible to estimate the performance of a vessel in unrestricted waters knowing only the wind strength and direction. A …method of estimating propeller efficiency in service is also described, and it is shown how this can be used to estimate the efficiency under most conditions likely to be encountered in service. By extending the analysis it is possible to estimate the thrust necessary to maintain a given speed under any conditions of weather or of fouling. In the present work, however, the thrust analysis has been restricted to comparisons between the thrust for a given speed on trial and the thrust for the same speed at the start of the maiden voyage and immediately after each subsequent drydocking. A numerical example is included and the results obtained from the analysis of voyage records of eight vessels are summarized. Show more
Citation: International Shipbuilding Progress, vol. 5, no. 50, pp. 453-471, 1958
Authors: Firth, D.
Article Type: Research Article
Abstract: Hydraulic transmission can be divided into two main groups: hydrokinetic and hydrostatic. Both have been in existence for more than half a century but whereas the hydrokinetic type had an immediate application the hydrostatic transmission has only recently been applied to marine propulsion. The paper surveys this field and discusses contemporary interest in the application of both forms of transmission to marine propulsion. It also discusses what use might be made of them in the future.
Citation: International Shipbuilding Progress, vol. 5, no. 50, pp. 478-490, 1958
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