Neilpryde RS-Racing Evo VII

DRIVE AND STABILITY

For the EVO7 we developed a progressive leading edge design that focuses the sail on top-end performance. An increased leading edge curvature supported by a wider luff sleeve aerodynamically generates more forward thrust and acceleration. The luff sleeve is up to 20% wider (in the boom area) supporting the extra fullness, locking the profile in and keeping it stable. Smooth, laminar airflow on the leeward side created by this new sail shape ensures minimal drag despite increased thrust. 

CONTROL AND ACCELERATION

Introduction of two carbon tube battens above the boom allows for power release in the mid leech section. This reactive mid leech prevents the draft from migrating back and releases excessive thrust generated. Using carbon battens meant that we could achieve the best stiffness to weight ratio, allowing for faster leech response. This power release system enables the rider to control the extra thrust created by the new sail profile, holding the shape and resulting in better acceleration.

Increased leading edge curvature generates more thrust

Carbon tube battens release excess power and lock the profile for more acceleration

QUADRUPLE LUFF PANEL LAYOUT

EVO7 features four continuous luff panels that carry most of the sail body shaping. This configuration stabilises the critical section draft position while also providing lightweight yet stretch-resistant way of increasing the film thickness proportional with downhaul load distribution. Continuous panels eliminated horizontal seams crossing the highly loaded leading edge, which increases response of the sail as well as durability. Introduction of this extremely stable leading edge platform that is able to take very high downhaul loads allowed us to integrate Clear Pocket construction in the remaining sail body.

COMPONENT SLEEVE CONSTRUCTION

The EVO7 sleeve is constructed by combining different materials with specific properties to achieve optimum profile entry stability and elasticity, critical for rotation and light weight. The front upper section (1) is made from lightweight woven material that has necessary elasticity and durability to resist wear from direct contact with the mast. Behind this panel there is a low stretch Dyneema™ ArmourWeb section (2) that takes high downhaul tension and is critical in stabilising the profile entry, providing smooth bridging between Ultra Cams. Inserted between this Dyneema™ panel and the sail body is a very lightweight, rip-resistant laminated film/taffeta with Dyneema™ yarns (3). Film controls the stretch, Dyneema™ provides ultimate rip resistance and taffeta is crucial for stitch holding. Bottom part of the sleeve is finished using our Luff Glide material as on other NeilPryde sails. This material combines very low friction against the mast (important for smooth rotation) with excellent durability and necessary elasticity in the bottom part.

CLEAR POCKET BATTEN SLEEVE

On the EVO7, overlapping body panels create a sleeve for battens, eliminating the need for traditional separate batten pockets. This obviously saves on unnecessary weight and simplifies construction. Much more importantly, Clear Pockets create a fully symmetrical batten cavity, eliminating the tendency of traditional batten pockets to load differently from one tack to another. Traditional batten pockets, sewn on one side of the sail make the sail body set deeper when they are on the leeward side of the profile than when they are on the windw ard side. Clear Pockets, set the battens effectively in the middle of the horizontal cross section of the sail, avoiding this problem.

FORCELINE

The clew area of the EVO7 features a custom laminated Kevlar™ Forceline Panel for load distribution. Load spreading Kevlar™ strips are laminated directly onto the sail body, fanning from the point load at the grommet and continuously crossing over panel joints. This not only provides optimum load distribution but it makes for extremely lightweight yet strong construction eliminating any air pockets present in traditional patch construction.