FREIGHTER FOR OCEANIC VOYAGE

PURPOSE:To provide an ocean-voyaging hull greatly reduced in friction resistance and fitted with a uniaxially spiral propeller, by setting the length of the hull at 100m or more, the ratio of the length to its width at 3.5-5 and its block coefficient at 0.7-0.8. CONSTITUTION:The length L of a hull,...

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Bibliographic Details
Main Authors OTAGAKI YOSHIO, SHIBATA KIYOSHI
Format Patent
LanguageEnglish
Published 29.11.1985
Subjects
EQUIPMENT FOR SHIPPING
PERFORMING OPERATIONS
RELATED EQUIPMENT
SHIPS OR OTHER WATERBORNE VESSELS
TRANSPORTING
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Summary:PURPOSE:To provide an ocean-voyaging hull greatly reduced in friction resistance and fitted with a uniaxially spiral propeller, by setting the length of the hull at 100m or more, the ratio of the length to its width at 3.5-5 and its block coefficient at 0.7-0.8. CONSTITUTION:The length L of a hull, the ratio L/B of the length to its width B and its block coefficient Cb are set at 100m or more, 3.5-5 and 0.7-0.8, respectively. The hull is fitted with a uniaxially spiral propeller. Since the length of the hull is made small, the wetted surface area of the hull is decreased so that the friction resistance thereto is reduced. Since the ratio L/B is set at 3.5- 5, the flow of water does not separate from the surface of the hull, so that its wetted surface area can be made relatively small to reduce the friction resistance. Since the uniaxially spiral propeller is provided, higher propelling performance is attained.
Bibliography:Application Number: JP19840096209