DIVA 39 Sail Configuration Guide

Overview

The DIVA 39 is a classic Scandinavian performance cruiser designed by Bernt Lindqvist and built by Fabola. It combines a narrow, elegant hull with a tall rig, targeting sailors who value speed, weatherly performance, and offshore capability.

Rig Specifications & Performance Analysis

• Mainsail Configuration: A P/E ratio of 3.14 indicates a tall, high-aspect ratio mainsail, providing excellent lift and efficiency upwind.
• Foretriangle Design: The I/J ratio of 3.26 is optimized for high-aspect headsails, typically favoring non-overlapping jibs or moderately overlapping genoas.
• Sail Area: With a 57m² total upwind area, the boat is well-powered for its narrow 3.01m beam.
• Performance: The sail plan is heavily oriented toward windward efficiency and light-to-moderate air speed.

Popular Sail Configurations

• Mainsail: Owners typically utilize full-battened configurations to support the tall P dimension and maintain leech profile.
• Headsail: Configurations vary from self-tacking jibs for ease of handling to 135% genoas for light-air performance.

Key Characteristics

• High-Aspect Power: The 3.14 P/E ratio maximizes lift while minimizing drag at the sail head.
• Narrow Entry: The 3.01m beam and 11.79m LOA ensure a weatherly hull that tracks exceptionally well.
• Efficient Foretriangle: The 3.26 I/J ratio allows for easy-to-tack headsails without sacrificing power.
• Responsive Handling: The balance between the 1.82m draft and 57m² sail area produces a stiff yet sensitive helm.

Sailing Considerations

• Effective in light air, but the tall rig requires early reefing—typically around 16–18 knots—to maintain flat trim.
• The narrow beam makes it highly responsive to weight distribution and sail trim adjustments.
• Typical crew requirements are 2–4 for racing, though it is easily handled shorthanded for cruising.

Sailmaking Recommendations

For the DIVA 39, 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 in light air. For cruising or bluewater sailing, add a taffeta protective layer on both sides to enhance UV resistance and abrasion protection. Based on the 3.14 P/E ratio, a load-path oriented layout works best to handle the high vertical tensions of the tall mainsail. A typical inventory includes a full-battened main and a 105% high-aspect jib. With 57m² of sail area, plan to reef the main once the true wind exceeds 15 knots to keep the boat on its lines.

Conclusion

The DIVA 39 is a sophisticated performer that rewards precise sail trim and high-quality materials. Explore sail options for DIVA 39 to maximize its high-aspect rig potential.