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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: Masuyama, Y.
Article Type: Research Article
Abstract: A directional stability has been analyzed for a hydrofoil sailing boat with two surface-piercing dihedral front foils and an inverted ‘T’ rear foil. For the analysis, the interactions of the motions in sway, yaw, roll and surge were accounted. The stability discriminant was calculated for three rudder conditions: fixed, manual controlled and windvane controlled. Even in the rudder fixed condition, the stability in directional motion of the boat was achieved in relatively wide range of true wind directions. Although the range of stable sailing was narrowed by increasing the boat velocity, the stability was considerably improved by the manual rudder …control. Using the windvane control system, the directional stability was also improved, where the area of windvane could be decreased by shortening the chord length of the rudder and by lowering the gear ratio of the system. Frequency response analysis, which was also conducted to detect the response of heading angle to the change in true wind direction, confirmed the validity of the results of directional stability analysis in conjunction with resulting in the quantitative relation between the windvane area and the directional motion. Show more
Citation: International Shipbuilding Progress, vol. 34, no. 398, pp. 178-188, 1987
Article Type: Research Article
Abstract: A form of the Green function is derived for the problem of a ship advancing in regular waves at constant forward speed. It has been found that this form has much better numerical performance than that given by Haskind or by Havelock. This should permit a substantial reduction of computer time.
Citation: International Shipbuilding Progress, vol. 34, no. 398, pp. 189-196, 1987
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