Does an inch in cord length matter much in fin sizing? I'm thinking about going from a 12.5" to a 13.5" with slight foil or shape changes.
Kinda crazy that fin size is measured in inches (or even centimetres if you're really progressive!)... Imagine if sails were refererred to by how long the mast was rather than surface area.
I've always wondered about that, I have noticed the odd fin that also quotes area.
But that is far from the whole story, there's also rake angle and chord to thickness ratio.
Aspect ratio also plays a part. My 38cm Drake fin has more area than my 40cm Curtis fin.
Rake is also important, particularly with weed fins. My FO 32cm weed fin has a very similar area to the 40cm Curtis.
