I am trying to further my understanding of fins and how they work. Can anyone explain the function of all parts of the the fins? It had been described to me that in a thruster set up, the center fin was for your bottom turn and the rail fins helped you come off the top. I don’t really buy that simplicity anymore. I have also heard the base of the fin is for drive, is that true?
Also, what is the function of the rake on a surfboard fin? Many fins used in other applications by humans have no rake, i.e. sailboat skegs and airplane tail wings. Just a curiosity. I’ve done some experimenting on my own but I find with the varying conditions its hard to do a proper ride report, and frankly all the experiments have worked, so I can’t throw out any failures and tweak the designs intelligently.
Finally, I was piddling throughot the archives looking for a post by I think Jimthegenus,or maybe chippy where he lists how many layers of 6oz to make fins to fit futures, fcs, and single box. Couldn’t find it, anyone know that info off hand?