I did some quick measurements on the Glaser sail in the photo. Photo analysis is never 100%, but the the best of my efforts gave:

Twist: 4deg
Camber top: 10.9%, position: 33.5%
Camber middle: 12%, position: 35.6%
Camber bottom: 11.6%, position: 40.5%

Measurements was done on the sail itself, disregarding the mast. Add about 2% draft to include the mast (rule of thumb on regular teardrop shaped masts, dont know about the SuperWing section). This results in a final draft of about 12-14%, not a very flat sail in my opinion. To compare, my own Tornado main cut for a heavy team was designed with app. 10%draft (+2% for the mast = 12%)


Was this sail designed primarily for uni-rig sailing, or sloop?




Adjusting diamond wire tension is something we do between races if the conditions change dramatically. Using a tension adjuster like in the photo on the A can be worthwhile as they need the extra power downwind. Spi boats dont want an extra full mainsail going downwind, we want to keep the slot open.