FIRST 36 Sail Configuration Guide

Overview

The FIRST 36 is a modern performance cruiser-racer designed by Sam Manuard to bridge the gap between high-speed offshore racing and comfortable cruising. This lightweight, planing-capable boat targets sailors who demand agility and speed without sacrificing the essentials for weekend trips.

Rig Specifications & Performance Analysis

Analysis of the P/E/I/J dimensions reveals a high-performance profile:

• Mainsail Configuration: A P/E ratio of 3.05 indicates a high-aspect ratio rig, optimized for vertical lift and upwind efficiency.
• Foretriangle Design: The I/J ratio of 3.08 is perfectly suited for modern, non-overlapping working jibs that facilitate easy tacking and high pointing angles.
• Sail Area: With a 70m² total upwind area on an 11-meter hull, the boat offers a high power-to-weight ratio.
• Performance: The configuration is heavily oriented toward performance, favoring early planing and responsiveness in light to moderate air.

Popular Sail Configurations

• Mainsail: Most owners utilize a full-batten configuration to support the high P/E ratio, often opting for a square-top design to maximize area aloft.
• Headsail: The standard setup relies on a 105-108% jib; many configurations include a furling code zero for reaching performance.

Key Characteristics

• High-Aspect Rig: The 3.05 P/E ratio provides exceptional upwind lift and aerodynamic efficiency.
• Optimized Foretriangle: I/J ratio of 3.08 supports easy-to-handle blade jibs for superior close-hauled performance.
• Stability: The 3.79m beam and 2.25m draft ensure high righting moment and a stiff sailing platform.
• Manuard Design: Hull form is optimized for stability at speed and stable tracking offshore.

Sailing Considerations

• The boat responds best to active trimming; expect to depower the high-aspect mainsail as the breeze exceeds 16 knots.
• While manageable by a couple for cruising, a crew of 4 to 6 is recommended to maximize performance during competitive racing.
• Expect high-speed reaching capabilities and a very weatherly nature when sailing upwind.

Sailmaking Recommendations

For the FIRST 36, 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 performance. For cruising or bluewater sailing, add a taffeta protective layer on both sides to enhance UV resistance and abrasion protection. Based on the 3.05 P/E ratio, a multi-directional continuous fiber layout works best to handle the high vertical loads of the tall mainsail. A typical inventory includes a square-top mainsail, a J2 all-purpose jib, and an A2 asymmetric spinnaker. With 70m² of upwind sail area, plan to reef around 18 knots to maintain a flat, fast profile.

Conclusion

The FIRST 36 is a versatile, high-performance platform that excels when paired with modern, low-stretch sail materials. Explore SurgeX membrane sail options for the FIRST 36 to maximize your boat's speed and longevity.