Using the Orma 60 footers and AC cup boats are a poor example, the C Cats and A Cats are probably the most developed of the boats using C Foils nearest our water line length and they really are not convinced.

The other factor no one really has mentioned yet is what happens in normal sailing wind speeds around the, 8 -12 knots band, small foils such as the F20 uses are in no mans land, neither creating enough lift to reduce wetted surface and yet must be creating drag, ( you cannot get lift without creating drag ), I do accept there must be benefit once boat speed gets to a point but in general that cannot be the norm. I do accept that the T foils on the Stealth for example can sort of defy logic.

I am a foil convertee however and I do believe all new design boats will go down this path and the more the likes of the AC and C Cats develop the foils we can only benefit in the smaller, size wise, classes.