FIRST 25.7 Sail Configuration Guide

Overview

The FIRST 25.7, designed by Finot and built by Beneteau, is a versatile cruiser-racer intended for performance-oriented coastal sailing. It balances a manageable sail plan with a stable hull, catering to both club racers and weekend cruisers.

Rig Specifications & Performance Analysis

• Mainsail Configuration: A P/E ratio of 2.84 indicates a high-aspect rig, prioritizing upwind efficiency and lift.
• Foretriangle Design: The I/J ratio of 3.61 is relatively high, favoring tall, high-aspect headsails and overlapping genoas for light-air performance.
• Sail Area: 32m² total upwind area provides a generous power-to-weight ratio for a 7.48m vessel.
• Performance: The rig is designed for agility and speed, making it highly competitive in PHRF or club racing while remaining docile for cruising.

Popular Sail Configurations

• Mainsail: Typically features two or three reef points, often with a 2+2 batten configuration to balance weight and shape.
• Headsail: Most owners utilize a 110-135% furling genoa for versatility, though blade jibs are preferred for heavier air.

Key Characteristics

• High-aspect 2.84 P/E ratio ensures excellent close-hauled performance.
• Powerful 3.61 I/J ratio supports versatile headsail options for various wind ranges.
• 2.76m beam provides the necessary stability to carry 32m² of sail effectively.
• Nimble hull design makes the boat exceptionally responsive in light to moderate conditions.

Sailing Considerations

• The boat remains stiff in light air but rewards early reefing when winds exceed 18 knots to maintain a flat profile.
• Easily managed by a crew of two, though the cockpit layout supports solo sailing with minimal effort.
• Expect weatherly performance and high pointing angles thanks to the deep 1.47m draft.

Sailmaking Recommendations

For the FIRST 25.7, we recommend SurgeX membrane sails as the optimal choice for most sailors. SurgeX uses continuous fiber construction where fibers are laid along load paths and embedded in a thin membrane, providing superior shape retention compared to traditional Dacron while being more affordable than premium laminates. The continuous fiber structure means less stretch over time, maintaining the designed sail shape for years.

For racing applications, specify a lightweight SurgeX configuration with minimal base weight to maximize acceleration and light-air sensitivity. For cruising or coastal hop sailing, add a taffeta protective layer on both sides to enhance UV resistance and protect against mast-slap abrasion. Based on the 2.84 P/E ratio, a tri-radial layout works best to distribute loads across the tall mainsail. A typical inventory includes a SurgeX Main, a 110% furling Jib, and an asymmetric spinnaker for off-wind performance. With 32m² of sail area, plan to reef the main around 17-19 knots to manage heel and helm pressure.

Conclusion

The FIRST 25.7 is a well-balanced platform that excels with modern, high-modulus materials. Explore sail options for FIRST 25.7 to maximize your boat's speed and handling.