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Join usMaximum wind range especially in changing and/or super gusty conditionsThis is the most important factor and the major advantage when going for a 5-batten handling sail. As a simple rule, more battens give you more control and a bigger wind range. Usually this has a negative effect on the low end power as more battens make it harder for the wind to inflate the sail and it becomes less efficient for pumping. Therefore Duotone have incorporated the Batten Free Center concept from the Super_Hero. Instead of the usual even batten distribution the Duke features a bigger gap between the foot batten and the batten above the boom. This makes the boom area easier to inflate plus increases the stability in the top (due to the increased batten density in this area).
Early planing power even without excessive pumpingTo achieve maximum planing power the Duke features a high draft distribution combined with a deep profile which helps lifting the board onto the plane.
Super neutral in maneuvers To make tricks and turns as easy as possible the sail should go completely neutral during maneuvers. Therefore, the Duke comes with a more forward oriented draft position. The forward draft turns the power off and goes completely neutral as soon as you sheet out or shift the sail. This results in a much higher success rate in maneuvers.
Good lift with maximum control for jumping. The higher draft position also increases your airtime as it generates lift while the more forward oriented draft position helps you to always remain in control.
Maximum range of use. One of the greatest assets of the Duke is its versatility. It’s a joy in bump & jump conditions on your freewave board or as a smaller sail for blasting around on your freeride board. The forward/up draft position makes it also very capable for classic and even new school freestyle tricks. And last but not least it’s a great sail for medium wave and/or jumping conditions especially in gusty or challenging wind conditions. So, the new Duke is a real all-round high performance contender challenging any handling sail out there.
Straight forward and fast to rig. With all the features, markers and hints Duotone have developed over the past 40 years it’s safe to say that there is no other sail which is faster or more precise to rig than a Duotone sail. This means even if you aren’t a pro who is rigging and trimming their sail every day you will still achieve the same correct trim. As only with the correct trim can you unlock 100% of the sail’s performance.
Similar feeling than your bigger Freeride/Performance sails. Another important factor is that all the sails in your quiver should have a similar feeling/behavior. This even counts for professionals as it usually takes even them a full day to get used and adjust their style to a sail which feels very different. The major reason why sails feel different is the position of the draft in the sail. Fortunately, also here the Duke has got you covered as it features a similar draft position to the vast majority of all modern freeride sails.
Product highlights
Light done right construction
Weight reduction of a clearly noticeable 200 to 300 g without reducing the thickness of the main panel thus maintaining the well-known durability and longevity!
Draft forward
Forward draft turns power off and goes completely neutral during manoeuvres >> results in a much higher success rate
Batten free center
Larger gap between the foot batten and the batten above the boom >> better inflation (= planing power) in the boom area and improved stability in the upper sail area
VTS tail outhaul specs
Each sail carries individually defined visual indications for the correct outhaul extension (requires VTS TAIL boom)
Irocket 2.0
Factory calibrated individual batten tensions using a torque wrench
HD Version
Reinforced monofilm-free HD-construction
Features
3D Top Cap
Optimised pull. On regular top caps and pin systems the webbing is connected in a “one-dimensional” way with the sail body (either side to side or front to back), which transfers the downhaul tension only in certain points. 3D TOP CAP allows a “three-dimensional” and very widespread transition of the downhaul forces into the sail body. This eliminates top fluttering and ensures a progressive loose leech extending the wind range. The integrated abrasion ribs eliminate the need for heavy, bulky reinforcements at the end of the luff sleeve
Polyester webbing only
Eliminating stretch and loss of tension. If it’s good enough for safety harnesses, it’s good enough for windsurfers! Duotone is the only manufacturer to use only polyester webbing for the (vario) top and the tack roller. This advantage of this compared to conventional polypropylene is the negligible amount of stretch. As a result even brand new sails will retain full luff tension and will not need subsequent trimming
TT TOP
Improved sail control at higher winds. Designer Kai Hopf originally designed the TT TOP for the WARP. The reduced, concave shape improves tension conditions for a more effective, three-dimensional top twist. This means the top twists not only horizontally, but also vertically under strong winds. By completely neutralising gusts of wind, the rig is kept steady in the rider’s hands, and thus works in a much larger range of winds
Irocket 2.0
iROCKET 2.0 batten tensioners are super-lightweight, aerodynamic and highly stable, consisting of high-quality components such as a self-lubricating, salt-water-resistant brass nut with stainless-steel screw which can withstand all batten tensions. Factory calibrated individual batten tensions using a torque wrench
Epoxy Battens
Extremely stable, extremely break-resistant
X-Ply Plus
Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, Duotone uses only 150 or 100 micron thick films for their exclusive X-Ply Plus. In an extensive series of tests, designers have developed the ideal combination of necessary film thickness and number of threads
Mini Batten
These prevent unwanted leech flutter. Short and highly effective mini-battens which provide support for the areas between the battens and prevent undesirable flutter
Double Seam Technology
Double the durability with half as much stretch. Duotone manufactures products of unmatched quality which gives their sails a significantly longer lifetime. A key feature which helps to achieve this is the triple-stitch zig-zag seams. Unlike other products with their single-seam design, these are double-seam. They cover all exposed crash areas, which increases tear resistance and reduces bending-elongation by up to 50%, boosting profile stability and performance
Mast Sleeve Opener
Frictionless insertion of the mast into the luff sleeve. An ingenious solution does away with the tedium of inserting the mast. Duotone logo above the boom cutout gently opens the sleeve so that the mast can be threaded with one hand into the luff friction-free, without having to constantly make adjustments to the luff
Individual boom length indication
Correct boom length without the need for trial and error. Because the boom is attached to the mast at different heights depending on body size, and because this creates a different angle to the mast, the boom length will vary. Specific recommendations for the correct length are printed directly on the luff sleeve at the boom level
Twin Strap
This keeps the sail rolled up and holds the protector to the mast. A brilliantly simple fastening system which keeps the sail compact and closed after being rolled up and, when on the water, holds the mast protector closely to the mast
Triple Tack Roller 3.0
Find the perfect trim with minimal effort. The integrated, nickel-plated brass triple roller minimises the downhaul forces tremendously
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