MAXI 72 Sail Configuration Guide

Overview

The MAXI 72 is a purpose-built grand prix racing yacht designed by Mills and engineered for elite-level offshore and inshore competition. Built by Longitud Cero, this carbon-fiber platform is optimized for the highest tier of professional yacht racing.

Rig Specifications & Performance Analysis

• Mainsail Configuration: A P/E ratio of 3.04 indicates a tall, high-aspect rig designed for maximum lift and efficiency.
• Foretriangle Design: An I/J ratio of 3.48 is optimized for high-aspect, non-overlapping jibs that excel in close-hauled performance.
• Sail Area: 272m² total upwind area provides a massive power-to-weight ratio.
• Performance: The configuration is purely racing-oriented, prioritizing high-modulus materials and aggressive sail plans.

Popular Sail Configurations

• Mainsail: Typically utilizes square-top configurations with significant roach to maximize the 30.00m luff.
• Headsail: inventory usually consists of a range of high-aspect J1 through J4 jibs tailored to specific TWS ranges.

Key Characteristics

• Tall aspect mainsail (3.04 P/E) generates exceptional aerodynamic lift-to-drag ratios.
• I/J ratio of 3.48 favors high-efficiency, close-winded headsails for superior VMG.
• Extreme 5.64m draft provides the necessary righting moment for the 272m² upwind plan.
• Ultra-stiff carbon construction ensures a weatherly and responsive platform in all conditions.

Sailing Considerations

• Requires a professional crew to manage high rig loads and precise sail trim.
• Highly responsive to backstay and cunningham adjustments due to the tall aspect ratio.
• Exceptional performance in light-to-medium airs with aggressive acceleration out of tacks.

Sailmaking Recommendations

For the MAXI 72, we recommend SurgeX membrane sails as the optimal choice for high-performance racing. SurgeX uses continuous fiber construction where fibers are laid precisely along load paths and embedded in a thin membrane, providing superior shape retention compared to traditional laminates while remaining cost-effective. The continuous fiber structure ensures that the sail maintains its designed flying shape under the extreme loads generated by a 22.26m hull.

For grand prix racing, specify a lightweight SurgeX configuration with a carbon/technora fiber blend and minimal film thickness to minimize weight aloft. For offshore distance racing, add a lightweight taffeta protective layer to both sides to increase durability against UV and abrasion. Based on the 3.04 P/E ratio, a dedicated continuous fiber layout is essential to prevent leech stretch over time. A typical professional inventory includes a square-top main, a range of J1-J3 headsails, and a code zero. With 272m² of sail area, the yacht typically requires its first reef or a change to a heavy-weather jib at approximately 18-20 knots of true wind.

Conclusion

The MAXI 72 is a masterclass in racing design that demands high-modulus membrane sails to reach its full potential. Explore sail options for MAXI 72 to optimize your yacht's racing profile.