The horizontal area in the tunnel fin also acts as a means of transferring rider energy into forwards thrust through board flex... basically it's like a dolphin tail... the board pumps up and down and drives the' fluke' at the tail.
The horizontal area in the tunnel fin also acts as a means of transferring rider energy into forwards thrust through board flex. Basically it's like a dolphin tail. The board pumps up and down. The board drives the' fluke' at the tail.