Introducing a NewProduct
  windsurf sail with auto stable profile.

Inspired by my father's flying wing.
Back in the 80 i experiment autostability in my hand made scale gliders toys.
In the 87-88 i was 15yr old my first autostable sail concept in a "artepovera" style model. Soon later a sailbout was made with this primitive idea, after talking about it.

In the 90 I introduce the concept pushing it in windsurfing segment with no results, pushing for "S" shape concave convex air foils in the sails and in the scoop rock of the boards still with no results in the mind of the shapers. 

The evolution pick very slow more in the kite segment because of a natural evolution and because is part of an evolution that cams from other segment; hang glider then paraglider finally kite sail.

I test auto-stability adding much more twist in my sails creating a bad angle and folding the mylar, for not nice flat surface between battens and it work !  Now we all use a lot of twist in the sails and windsurfers do not know the real reasons of it (is not only for to reduce the induce resistance and compensation of speed in alt. At the end of 90 i push harder in the formula segment explaning the flap and S shapes reasons in sails with no results.

Long-term Goal
 The intended goal is to produce and sell this new sail concept worldwide.

This 2002-2003 (25/08/2003) drawings for windsurfing are just an evolution of my idea and concept of puting a
Flap to make an s shape corde Autostable airfoil and Sail (sail flap stabiliser). This will improve profile stability and power range. For example if you have a 6m 2 with flap, you will get the power of a 7m . If there is too much wind you can apply negative flap and you will get the feeling of a 5m.
If you have a 8m , with flap you will get a 10m and with flap negative a 6m. You can get a 14m power with a 10m sail. This is because a normal profil is working at 0.8 Cl and with flap you can get 1.4 of Lift Coefficient.

Customer Wishes
 The customer needs a lot of sails to coverwind range.
 They wishes to have a sail that covers thebiggest wind rang as possible.
 They want to be more faster on water.
 They need more control on the sail whenthe wind improves
 They wishes cheaper sails.

Fulfilling Customer Needs
 With small modifications on the battensyou can obtain a flap or an auto stable profile.
 We don't need to many rigid battens.
 We don't need to use so much carbon onit.
 The sails will be more light
 This combination creates a bigger wind rang sail.
 Less expensive.

Cost Analysis
 The financial advantages for the customerare that they doesn't need to buy lots ofsails.
 The aerodynamic quality improves theglobal quality of the product, the cost willby very similar compare the price withthose of the competition.
 This sails doesn't need to have so expensive battens.
 With few battens we can make a cheapstable sail.

Strengths and Advantages
 This system improves the product in a natural way.
 It makes the new product special buy performance and not only buy style.
 Gives advantages on Formula using biggersails.
 Using the flap we obtain more power at lowend speed.
 Gives control at top speed for new speedrecords
 We can build a cheaper sail very stable.

Next Steps of Action
 The next steps that now we need to do isto make a first prototype.
 It can be by the modification of a spiritadding a rigid peace; not having a flapbut only a semi stable profile.
 By the modification's of a RS buy addingthe flap and a new rope system
 Or building a new 14 square meter forformula races.