Have a look at Hakan's latest attempt at a A class with Spinnaker on www.catsailor.com/forums/ubbthreads.php?ubb=showflat&Number=192263#Post192263

Interesting to read he can get the boat out of the water on its curved foils, pity I cannot afford the money to go all out as he has done. 20 knot plus already so it is definately fast.