The Roll Tack Revolution: Emirates Team New Zealand's New Strategic Edge
Overview of the AC36 Tactical Evolution
On the opening day of the , a distinct shift in maneuvers redefined the competitive landscape. abandoned their previous "set it and forget it" foil philosophy from the World Series in favor of a dynamic, gear-shifting approach. This isn't just a minor adjustment; it is a fundamental rewrite of how yachts transition through the wind. By actively manipulating the foil cant system during active racing, is hunting for marginal gains that decide championships.
The Roll Tack Mechanism
has mastered a roll-tacking procedure that mirrors dinghy sailing fundamentals on a massive scale. They initiate the turn by inducing significant leeward heel, moving the rig's center of effort outboard. This natural leverage forces the bow into the wind without excessive rudder drag. To prevent the hull from lifting and breaking the aerodynamic end-plating effect, they aggressively cant the foil to over 70 degrees. This keeps the center of gravity low while the hull rotates, maintaining maximum efficiency throughout the transition.
Performance Breakdown: Clean Air vs. Traffic
Data reveals the success of this maneuver depends entirely on tactical positioning. In clear air, uses a slight bear-away to build momentum before the roll, effectively neutralizing the advantage of larger foils. However, when sits in a close leeward position, cannot execute the necessary bear-off. Without that runway, the roll tack falters, leading to losses of up to 20 meters per maneuver.
Critical Impact and Future Implications
The strategic response for is clear: tighten the leash. By forcing into "dirty air" or short-tacking them before they can build speed, the Italians can negate this mechanical advantage. For , the challenge lies in focus. Playing with too many variables—foil cant, mainsheet trim, and trapeze adjustments—can lead to "mode instability." They must decide if the complexity of the roll tack outweighs the reliability of a locked-in straight-line speed mode.
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ETNZ roll tacking is actually fast, but will Luna Rossa allow it?
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