FINNFLYER 27 Sail Configuration Guide

Overview

Designed by Eivind Still and built by Simunan Kuitutyo, the Finnflyer 27 is a performance-oriented cruiser-racer from Finland. It balances spirited sailing characteristics with a manageable 8.20-meter platform designed for both club racing and coastal cruising.

Rig Specifications & Performance Analysis

• Mainsail Configuration: A P/E ratio of 2.75 indicates a moderate aspect rig that provides a balanced center of effort for stable handling.
• Foretriangle Design: The I/J ratio of 2.96 is optimized for large overlapping genoas, allowing the boat to generate significant power in light to moderate air.
• Sail Area: 26m² total upwind area provides a healthy power-to-weight ratio for an 8.2m hull.
• Performance: The rig is designed for a weatherly, close-winded performance typical of Eivind Still's racing heritage.

Popular Sail Configurations

• Mainsail: Configurations typically focus on a full-batten or semi-full batten setup to maintain the 2.75 aspect ratio shape.
• Headsail: Most owners utilize a large overlapping genoa (135-150%) for light air, complemented by a high-aspect working jib for heavier conditions.

Key Characteristics

• Moderate aspect mainsail (P/E 2.75) ensures easy trimming and efficient reefing.
• High foretriangle ratio (I/J 2.96) favors powerful genoa-driven performance.
• Wide 2.80m beam provides the necessary stability to carry 26m² of sail effectively.
• Balanced hull and rig dimensions result in a stiff, predictable sailing experience.

Sailing Considerations

• The boat is primarily powered by the headsail; ensuring smooth genoa tracks and winches is critical for performance.
• Requires a crew of 2-4 for racing, though the 8.2m LOA makes it easily manageable for double-handed cruising.
• Performance is optimized in 8-15 knots; the boat remains stiff and stable due to its 1.40m draft.

Sailmaking Recommendations

For the FINNFLYER 27, 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 Finnish airs. For cruising or coastal sailing, add a taffeta protective layer on both sides to enhance UV resistance and abrasion protection. Based on the 2.75 P/E ratio, a tri-radial fiber layout within the membrane works best to handle leech loads. A typical inventory includes a 14m² mainsail and a 12m² high-aspect jib or larger genoa. With 26m² of total sail area, plan to reef the mainsail around 18 knots to maintain a neutral helm.

Conclusion

The Finnflyer 27 is a versatile Eivind Still design that rewards precise sail trim and modern material choices. Explore sail options for FINNFLYER 27 to maximize your boat's performance and durability.