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.
After mapping out bifins, I want to gather materials and design notes for building a monofin blade. This will be a bit more complex than bifins because monofins need more lateral stability and usually use internal reinforcements.
Now that I’ve mapped out the foot pockets, I want to gather everything I need for actually building a short carbon bifin blade. This is basically my BOM (bill of materials) plus a few notes on layering and finishing.
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: