Stand up paddleboard (SUP) fin (Futures fin style)

thingiverse

I have a home-built touring Standup Paddleboard (SUP) with fins held in "Futures fin" style boxes. I've found it's really tough on these fins and replacing them with genuine Futures Fins is just too pricey. This is a basic, medium-sized fin designed for easy printing, featuring a simple curved shape and a chamfered trailing edge. I drew it up in Solidworks with a basic radius nose. Because the fin is so thin, it's tough to print it all at once without supports getting in the way. To get around this, I split the fin in half along its midline, printing one half flat side down and then bonding the two halves together. My current fins are made of simple PLA and bonded with Cyanoacrylate adhesive. If you want to try your hand at printing a single fin, I've included the full design file (SUPfinMed.stl). Printing them in two halves also lets you mix and match colors if that's what you're after. These fins aren't designed for high-performance paddling; they're just a simple, budget-friendly solution.