What is the difference between a Nacra 5.7 and a Nacra 570? I think they are different somehow, but I don't know HOW.
If the difference is the same as the difference between a 5.O and a 500, it's not much. The 500 has a squaretop main of slightly larger area than the 5.O, compensating for the slightly smaller jib which sheets to tracks in the main beam rather than farther aft. The hulls are identical.
