AC75 Sails and Shape described by Vittorio d'Albertas, CEO Quantum Sail Design Italy. Alinghi/INEOS

In a captivating episode of World On Water, we delve into the intricate world of AC75 jib sheet systems with Vittorio d’Albertas, CEO of Quantum Sail Design Italy. With an extensive background in sailing and high-performance sail design, Vittorio sheds light on how these cutting-edge systems shape sails to optimize racing performance.

Sail Shape: Key Factor for High-Speed Racing

The importance of sail shape in high-speed sailing races like the America’s Cup cannot be overstated. AC75 teams, including Alinghi/INEOS, have recently adopted an age-old concept in modern sailmaking – the bias SL. This involves structuring the sails with a very weak, elastic structure, significantly different from traditional rigid structures.

The Bias SL Concept

Also known as the bias lead concept, this approach employs heavily charged lines of straight fibers to create a structure that limits the shifting of the sail’s shape forward when tension is applied. This control over the forward movement of the sail’s leading edge allows for tighter sheets and reduces catamaran sag, potentially increasing performance.

Diverse Implications in Sail Design

While this concept is highly beneficial for non-attached sails like wingsail setups, applying it to attached jibs on AC75 boats presents unique challenges. Specifically, managing the control of sail shape and tension while allowing for sufficient catamaran sag proves tricky.

Quantum Sail Design’s Innovative Approach

In response to these challenges, Alinghi/INEOS and other innovative teams are reviving the bias lead concept. The transparency of the front part of the sail hints at this strategy’s increased shape versatility. Vittorio d’Albertas and his team at Quantum Sail Design Italy have found that elastic structures in the sail’s leading edge greatly aid in retaining tight shapes, especially beneficial for larger sails like the J2.

Facing Complexities with Solutions

The complexity of jib sheet systems has increased, reflecting a push towards optimizing sail shape and performance. As Vittorio highlights, both the main and jib sheet systems are complex but essential for achieving the desired sail shapes required by modern racing boats.

Capturing Performance Gains

Through ongoing testing and collaboration with sailors, Quantum Sail Design Italy and other leading teams are honing the jib sheet system’s capabilities. As we witness more sailing races adapting this advanced design approach, it will be exciting to see how these innovative strategies further push the boundaries of high-speed sailing performance.

Moving Forward

In conclusion, Vittorio d’Albertas and his team are at the forefront of revolutionizing America’s Cup sail design with their innovative jib sheet systems. As teams continue to push the envelope in high-speed sailing, expect to see further refinements and adaptations of this groundbreaking concept.

Finding a Balance

In embracing both the bias SL and elastic structures, teams like Alinghi/INEOS are seeking to achieve a harmonious blend of performance optimization and versatile sail shapes. As this technological evolution unfolds, we eagerly anticipate witnessing even greater advancements in high-speed sailing races.