| 摘要 |
The invention relates to a fin for fast watercraft such as, in particular, surfboards, in which the fin front edge is swept forward in the sailing direction. The profile of the fin 1 with negative sweep is designed over its length as a laminar profile with sharp front edge 5 and sharp rear edge 6. At least one flow-vortex separation member 7 is provided in the area of the connection of the fin 1 to the fin holder 2 and/or the vessel bottom (Fig. 1). <IMAGE>
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