Privilege 580 Signature: Review and Ideas

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Innovation Corner
• Privilege 580 Signature: privilegecatam...
Sail Technology
North 3Di: Innovative Sailmaking Technology: • North 3Di: Innovative ...
The right sails on a boat can improve your yacht's sailing performance much like the right tires will have a significant impact of your vehicle's performance. Both technologies translate a source of power into your forward motion.
I never really thought about how critical high-performance sails were to my future cat until an experienced sailor pointed this fact out to me.
I thought fancy sails were for fancy sailing racers. I never stopped to think that, although more costly than the typical delivery sails, not only is a set of advanced sails is a relatively cost-effective way to both boost my boat's sailing performance across the full spectrum of wind conditions, but also makes short handed sailing much easier, duty their lighter weight. Finally, and perhaps most importantly, these sails are stronger and more reliable, providing a greater level of safety on the open ocean.
I had heard of Hydranet sails, as they are often offered as an upgrade on many option list. I had read less about 3Di, and relegated it to the purist pile. As it turns out, this is not the case.
3Di will make a stronger and lighter sail than Hydranet for similar money depending on which 3Di product you look at.
3Di can be:
1. All poly
2. Blends of poly / aramid, poly / dyneema, aramid / dyneema or
3. Aramid, dyneema and carbon
Lighter, stronger, and more dimensionally stable sails are faster.
The technology has three components.
1. The use of spread-filament tapes
2. A sail shape set on a full-size 3D mold
3. The elimination of Mylar film.
1. SPREAD FILAMENT TAPES
Spread filament is fiber's purest, thinnest, and most elemental form. Spread filaments are straight and flat with zero geometric stretch.
This means that 3Di has far more effective stretch resistance at equal sail weight than any other type of sail.
2. 3D SAIL SHAPE
Each 3Di sail is assembled on a 3D mold set to the customized shape for each sail. Once cured, the sail's shape and durability are permanently locked into a rigid airfoil. This eliminates 2D broadseam shaping and also eliminates the risk of delamination, both of which shorten a sail's performance and life.
Broadseam is a term particular to the making of a sail. The panels that make up the sections of a sail are cut with curves on the connecting edges or seams. This method adds a three dimensional shape to what would ordinarily be a flat triangular or quadrilateral piece of fabric. Since a sail is a type of airfoil, this method of sail making adds significantly to the amount of draft a sail can have.
3. NO FILM. NO DELAM
3Di composite sails are:
• 70% structural material;
• 30% thermoset resin;
• and 0% Mylar film;
which means no shrinkage and no parasitic weight, and completely avoids weak, crack-prone layers. With 3Di, there is no filler and all the materials go towards supporting the structure.
Pound for pound, 3Di produces a stronger, longer-lasting sail for the same weight.
To put this into perspective, another high-performance sail material, Hydranet, is essentially a woven polyester with a small amount of Dyneema added.
Because the Dyneema melts at a temperature below that at which normal woven dacron experiences in the finishing process, Hydranet is loosely woven and without shrink, and, instead, uses layer of resin to stabilize the material. The resin adds weight and makes the material stiff until it breaks down. When it breaks down, the sail shape will change for the worse.