Malcesine Slam Cup - Sails Report by Yann:

Please find the pictures of your last set of sails, shape, numbers and comments.
Regarding the mainsail, the draft is too far forward and too straight back. Around 12 knots, when you want to sheet it hard, the sail start to break, vertical wrinkles appeared because the sail is too straight back, you need a minimum shape at the back. On this boat the draft at bottom and mid stripe should be between 45% and 50% and at the top stripe between 40% and 45% depending of the wind strength. Camber at 12knots should be 9%. Luff curve is not perfect, checkstay are always loose. Probably need less luff curve at mid stripe (-10mm) and more luff curve at bottom stripe (+10mm) to get more shape on the bottom of the sail.
G1 is too flat, draft is too far aft and leech is already making spoon. At 8 knots of wind camber should be around 15% at mid and top stripe, 13% at bottom stripe, draft should be between 30% and 35%.
G2 is a good sail; just draft at top stripe should be more forward at 30% 35%. Leech is also starting to make spoon.
G3 was not use in a proper range.
A1 has not a very nice shape. Round at the luff, flat in the middle and round at the leech. Shape should be smoother and more regular. We did not take any picture unfortunately.
I recommend bringing the mainsail, G1, A1 and A2 and probably old A1 A2 to the sailloft to try to fix problems.