[tevake]

I got interested in foil development when sailboards got so fast that surfboard fins just weren't up to the task.

The rapid development of foils on the foil bourn cats is so clear.
Listen to the foils humming and screeching on the boats at speed in the Cup series in San Fransisco a few years ago. Now they are almost silent at even higher speeds, and that's a good sign. Noise means vibrations and that means drag and cavitation.

Cheers Richard