| 摘要 |
The disclosure concerns various arrangements for reducing resistance to the advance of a nautical vessel through water. An element 1 external to the hull of the vessel has flotation capacity for supporting at least part of the weight of the vessel. The external element may have external projections 2 so that upon rotating, the external element moves the vessel. Alternatively, a plurality of the external elements are supported on a hub or a belt for themselves being moved by their support through the water, thereby for moving the vessel. <IMAGE> |
