YNGLING MD Sail Configuration Guide

Overview

The YNGLING MD, designed by Linge and built by Borge Bringsværd, is a refined development of the classic Yngling concept featuring an extended 7.57m hull. This design targets the performance daysailing and club racing market, offering enhanced stability and a technical rig.

Rig Specifications & Performance Analysis

• Mainsail Configuration: A P/E ratio of 2.60 indicates a moderate high-aspect rig designed for efficient lift and reduced drag upwind.
• Foretriangle Design: The I/J ratio of 2.23 is optimized for high-efficiency working jibs rather than large, overlapping genoas.
• Sail Area: With a 16m² total upwind area, the boat is powered for agility in light to moderate air.
• Performance: The configuration favors technical windward-leeward performance with a focus on high pointing angles and responsiveness.

Popular Sail Configurations

• Mainsail: Standard configurations typically utilize cross-cut or tri-radial layouts to manage the 9m² area.
• Headsail: Working jibs are the primary choice, often fitted with vertical battens for better leech control.

Key Characteristics

• Moderate high-aspect rig (P/E 2.60) for efficient upwind lift.
• Versatile foretriangle (I/J 2.23) optimized for high-modulus jibs.
• Stable 2.46m beam provides a solid platform for the 16m² sail plan.
• Lead-corrected draft of 1.33m ensures excellent weatherly performance.

Sailing Considerations

• The boat is highly responsive in light air but requires proactive depowering as the breeze builds.
• Typical crew requirements are 2 to 3 people to manage trim and weight effectively.
• Performance expectations include sensitive helm feedback and a stiff, predictable motion.

Sailmaking Recommendations

For the YNGLING MD, 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 daysailing, add a taffeta protective layer on both sides to enhance UV resistance and abrasion protection. Based on the 2.60 P/E ratio, a tri-radial layout works best to handle the vertical loads on the mainsail. A typical inventory includes a primary membrane main and a non-overlapping jib. With 16m² of sail area, plan to reef around 18 knots to maintain a flat, fast profile.

Conclusion

The YNGLING MD features a well-balanced rig that excels when paired with modern, low-stretch materials. Explore sail options for YNGLING MD to unlock the full potential of this Linge design.