pikovsg wrote: ↑
Sun Oct 22, 2017 1:18 am
I wonder if the 12 Ultra would actually have more low end for foiling than a 15.
That's the same question I asked myself and calculated the weight to surface ratio of both, finding that there is a negligible advantage for the 15.
If the aerodynamics is equal for both sizes, then both will fall at the same low end. But that's theory.
I doubt the 15 has a tangible difference for the extra 1 knot at 5 knots. The wind force difference between 6 and 5 knots is ~44% while the extra surface is only 25%.
Of course the practical way to know is comparing both back to back. Maybe I'll have a chance to test a 15 , should I convince the dealer to open one for the purpose
For the time being, the Ultra 12 is all I need for my practical 7-10 knots purposes. It absolutely doesn't fall in that range.