I have lost track of who is building F16 sails now. I know Glaser and Ulman, who else? Yesterday Robi and I sailed in light air. Whe we were done, we put our mainsails over each other on the grass. His Ulman was a good 6 inches longer at the foot but narrower on the leach, by about 6 inches at the mid point. What are the other builders doing? Wider or longer? I think in a blow, his might be faster due to more sail area down low vs. my wider sail up high I might have to de-power earlier. His square top was "more square" than mine too. That is, his makes about a 90 degree line, luff to leach, at the top while mine slopes down toward the leach a little more.

Thoughts?