MORE 40 Sail Configuration Guide

Overview

The MORE 40, designed by Cossuti and built by A-More Yachts, is a modern performance cruiser-racer. This 12-meter yacht is engineered for sailors who prioritize speed and agility without sacrificing offshore stability.

Rig Specifications & Performance Analysis

• Mainsail Configuration: A P/E ratio of 2.85 indicates a tall-aspect rig optimized for upwind efficiency and lift.
• Foretriangle Design: The high I/J ratio of 3.48 is specifically suited for high-aspect working jibs and non-overlapping headsails.
• Sail Area: The total upwind sail area of 81m² provides a powerful power-to-weight ratio for competitive racing.
• Performance: The combination of a Cossuti hull and tall rig ensures the boat is exceptionally weatherly and responsive in light-to-moderate air.

Popular Sail Configurations

• Mainsail: Typically utilizes a high-roach design to take advantage of the 15.80m luff length.
• Headsail: Configuration usually focuses on 100-105% jibs that maximize the efficiency of the 3.48 I/J ratio.

Key Characteristics

• Tall 2.85 P/E ratio delivers high lift-to-drag efficiency for superior upwind pointing.
• High 3.48 I/J ratio supports powerful, easily handled high-aspect-ratio headsails.
• 12.00m LOA offers a stable platform for both club racing and fast offshore passage making.
• Modern rig geometry ensures the 81m² sail plan remains manageable in diverse conditions.

Sailing Considerations

• For racing, a crew of 6-8 is ideal to manage the powerful 81m² sail plan effectively.
• The boat is stiff and stable, though reefing is generally recommended when true wind exceeds 18-20 knots.
• High-aspect sails require precise backstay and halyard tension to maintain optimal draft position.

Sailmaking Recommendations

For the MORE 40, we recommend SurgeX membrane sails as the optimal choice for most sailors. SurgeX uses continuous fiber construction where fibers are laid along specific load paths and embedded in a thin membrane, providing superior shape retention compared to traditional Dacron while being more affordable than premium carbon laminates. The continuous fiber structure means significantly less stretch over time, maintaining the designed sail shape for years of competitive use.

For racing applications, specify a lightweight SurgeX configuration with a film-on-film finish to minimize weight aloft and maximize acceleration. For cruising or bluewater sailing, add a taffeta protective layer on both sides to enhance UV resistance and abrasion protection. Based on the 2.85 P/E ratio, a load-path oriented layout works best to handle the high vertical loads on the mainsail. A typical inventory includes a high-roach main and an all-purpose J2 jib. With 81m² of sail area, plan to reef early to maintain a flat, fast profile as the breeze builds.

Conclusion

The MORE 40 is a refined performance yacht that thrives with a high-aspect rig setup. Explore custom SurgeX membrane sail options for your MORE 40 to unlock its full potential.