This invention as seen on Fig. 5 is a surfing fin with addition of two little pectoral fins to base of main body of its basic design. The fin is called FF fin, short for Fly Fast Fin. The invention is directed mainly towards surfing industry, to be used on surfboards. The invention can also be used on SUP watercraft, and wind surfing watercraft. The fin is faster the a regular fin, and adds more control of motion to a surfboard. Having the two attachments (7,10) changes how the surfboard behaves, it gives it more trac tion during turns, just like having better tyres on a car. The most important characteric is the increase of speed of motion , or decrease of speed of motion at will of a surfer. The FF fin is moulded as one, to fit any surfboard (11). The innovation is the addition of two pectoral fins (7,10) situated at both sides of the main body fin (3) that help to control the movement of a surfboard during locomotion. The pectoral fins are simply situated at the base of the body fin (3), and are roughly one third of area size, with their backward sweep (1,2) having similar pivot angle to the main fin. The main fea tures of the design is the cant angle of the two pectoral fins (9) which changes the performance of a surfboard. The area of the pectoral fin (7,10) supports the surfboard in a unique way, as it causes the surfboard to lift above the surface of water when the weight of the back of a surfboard is released at motion. This also acts in reverse, as it helps to slows down the surfboard when pressure is on back of a surfboard, as more traction is active when fully immersed in water, as more water resistance due to extra mass is present, This a unique set up, it is almost a work of nature, as I noticed after I created it, that most sea creatures fish and mammals have fins at that angle to have more control in water locomotion. Figure 5


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    Title :

    FF Fin, a fin for a surfboard


    Contributors:

    Publication date :

    2015-05-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



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