| 摘要 |
The present invention relates to a structure that will reduce waterdrag for watercraft moving on the surface of water, thus will enable such watercraft to move at greater speed, consume less fuel and bear less action from waves. A water frictional drag reducing structure for the watercraft comprising:at least two rows of flat circular disks, each of flat circular disks is linked at the axis of center thereof, and the axes of center of the said flat circular disks are connected to hulls of the watercraft, or the axes of center of the said flat circular disks are linked to frames disposed between axis of center of the said flat circular disks, these frames disposed between axes of center of the said flat circular disks connected to the a hull of the watercraft moving on the surface of water in thee form of symmetrical rows through a longitudinal axis of the hull of the watercraft, the said flat circular disks are being capable of rotary by bearings between flat circular disk and axis of center of flat circular disk or bearing between axis of center of flat circular disk and hull of the watercraft, or bearing between axis of center of flat circular disk and frame holding axis of center of flat circular disks, the said flat circular disks are so mounted onto the watercraft that plane of flat circular disk is tilted to longitudinal axis of the hull of the watercraft, and plane of flat circular disk is also tilted to horizontal axis of hulls of the watercraft; because of symmetrical arrangement of the rows of the said flat circular disks under hull of the watercraft, weight of hull of the watercrafts is distributed over the said flat circular disks, whereby when the watercrafts moving by a power of a power unit or by a dragging force of a dragging unit, the plane, of the flat circular disk is so holded in its tilted conditions that the said flat circular disks are lifted and at least one part of surface of lower edge the of flat circular disk is submerged in the water, and this part of surface of lower edge of flat circular disk submerged in the water is being movable substantially paralell with the watercraft but in a direction opposites to the the movement direction of the watercraft so that relative speed between the part of surface of lower edge of flat circular disk submerged in the water and the contacted water layer is small and thereby generating a small sliding friction, avoiding an influence of the water wave. |
