This post is about lift and drag by the 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. Not that you have to multiply the pound forces by three...

WATER-FLOW STUDIES We did some Computational Fluid Dynamics (CFD) studies to help see and illustrate the flow of water around a typical surfboard fin, and FinSciences' fins with finlets.Water flowing into a typical fin creates a swirl or vortex around the fin tip....