Hi all,
In a previous life I worked as a sail maker for yachts, building sails from maxi yachts to skiffs, I've long since moved on, but my keen eye for design and shape has never left me.

All the current wind wings are made from kite cloth, and it appears generation II is moving to lighter weight cloth. This is pretty logical for some shapes and some wind ranges, but not all. Following this the S2 window from Naish is just garbage, and will stretch and bag out within a season. To everyone who bought one, you should consider having the window replaced with something with a yarn in it, as I mentioned, this incorrect sail loading will result in a short lived shape.

So my real point remains, why hasn't anyone used laminate cloth for a wing. With the TWA so far forward of the beam, very similar to a moth or any foiling yacht you're going to be sailing upwind on almost all points of sail. A point as been made that you need to be able to pump a wing to get up and flying. Have people not seen the olympic RSX wind-surfing? RSX sails are only radial sails and yet get quite a pump (almost a trashing) in light and even moderate wind. Another positive would be longer lasting and less likely to be damaged, to keep <4oz spinnaker cloth in fighting form will probably require recuts after 2+ years (Believe me, I've recut plenty of kites to reshape them after 3-4 years. It almost becomes an annual part of service for some.)Perhaps the next move is for big named sail makers to come along and help push design to the next level. Carbon reinforced corners with loading yarns similar to any laminate sail. This is what could and should bring to the future. Perhaps even just using heavier kite cloth and using a flatter shape, this would allow the sail to stretch naturally and keep a lengthier useful life.

Anyhow, hopefully some more experienced wind surfers can give some insight.

Cheers.