I wanted to see how a simple cantilever beam model matches what happens with freediving fins. The idea is that a fin blade is essentially a thin rectangular beam clamped at the footpocket and loaded at the tip by the force of the water.
I finally pulled together a quick reference for how tip load ("hardness") and bending profile play together on long freediving blades. The clearest explanation I have found so far comes from this breakdown: ▶️ Blade stiffness explained.
This is the second half of my research — this time looking at monofin foot pockets. Most DIY monofins seem to either use dedicated monofin pockets or just adapt bifin pockets. I want to collect the options here to see which direction makes sense for a DIY build.
I want to build a short carbon bifin for pool and training.
Before cutting any carbon, I need to choose the foot pocket. These notes collect what I’ve learned so far.
The main questions: