Surfboard Fin Performance in Numbers, SUP Fin Performance in Numbers. The lift and drag for fins can be calculated. But few companies share their numbers—if they know them. Here is a table comparing our 4.8" fin to a typical 4¼" fin. Note that you have to multiply the...

WATER-FLOW STUDIESWe did some surfboard fin water flow studies, using Computational Fluid Dynamics (CFD). These surfboard fin CFD studies help show the flow of water around a typical surfboard fin, and around FinSciences' fins that has finlets.Water flowing into a...