BPF prototype Extreme Weed Speed fin
It is 21cm deep with a leading edge rake of 45 degrees. The area is 185cm2.
This is a fin for the guys who have proper speed boards and are going
over 40knots. It is optimised for about 45 knots but is efficient from
about 37 knots onward. It will need a skilled rider as it won't have
much grip below 20 knots.
