What they do
The big story on these is their effectiveness in the crossover range between a genoa and a Code 3A. The photos show the sail at a 40-degree AWA in 6.5 knots of true wind. Boat speed is around 7.8 knots. A similar sail on a Farr 40 was used reaching in 16 - 24 knots of breeze at 80 to 90 degree apparent wind angles. Both are conditions that would have been pretty slow with conventional sails. How wide the range for these sails is and how well they compare to the other Gradient products is coming to light as they get more use.

Limits
The biggest challenge in making these sails fly is the limits placed on them by the handicap or class rules that have to be met. IMS, most PHRF and many class rules define what an asymmetric spinnaker must be. In general, that means:

• Asymmetric - the leech must be less than 95% of the luff in length.
  
• Mid Girth - must be at least 75% of the foot length. (This is in the RRS, as well)
  
• Additionally, the sails are limited to a maximum width (girth limited) or to an area through a formula using luff, leech, foot and mid girth.