What Do the Fins on the Surfboard Do?

Video Transcript

Hi this is Kimo Greene and I am here to teach you how to shape a surfboard on behalf of Expert Village. As a surfboard maker, what you are doing is directing water, hydro dynamically, so you want it flow. The way the "Thruster Principle" works is that it utilizes the forward fin to set up the turn and the back fin finishes it. It creates thrust but you have to be turning in order for it to work. If you just like cruising through the water, they actually drag. That make the board go slower because you have more surface. But if you keep them moving it creates a thrust through the board and that is where my "Double Barrel" comes in too. The Double barrel, you can not really see it, that is my secret, my top secret stuff you were talking about. It hydro dynamically foils the water through the fins and creates lift and thrust at the same time. So it make the board feel a lot shorter. Even though if you have a nine foot board or a ten foot board, it will make it feel like it is turning like an eight foot board. I personally like to ride a single fin board on a ten foot. A nine foot board I will ride a thruster, just because I turn it more. It is a personal preference, depending on what you like. That is the whole thing about surfing it is such an individual sport. That is the last thing I do when I shape a board, is put the Double Barrel on it and I sign it and put a serial number on it.

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