Around 20 yrs ago, There was a fin that a friend bought for his single fin longboard and he told me that the drive and top turn speed exceeded what he had gotten used to from single fins.
The fin was an 8.5" or 9" fin that was shaped like a V and fit into a single fin box... Not to be confused with single fin Cheyne Horan type fins that have a base that extends downward ( when the board is in the water) and then splits into a foiled Y or T ... This fin split into 2 fins directly out of the box, to form a V.
I spoke with the designer of that fin one time when he was in the shop and I think he's Barry Jones and he designed other fins for Velzy.
Has anyone seen or used or is able to provide info on a fin like the one I'm describing?
I tried a few searches and so far am finding nothing.