MIURA Sail Configuration Guide

Overview

Designed by Oswald Berkemayer and built by NEBE, the MIURA is a balanced 9.33-meter cruiser-racer. Its design philosophy centers on versatile performance, making it a capable platform for both club racing and coastal cruising.

Rig Specifications & Performance Analysis

• Mainsail Configuration: A P/E ratio of 3.10 indicates a high-aspect rig, prioritizing lift and efficiency while sailing close-hauled.
• Foretriangle Design: The I/J ratio of 2.94 is optimized for large overlapping genoas, providing significant power in light to moderate air.
• Sail Area: 37m² total upwind area provides a healthy power-to-displacement ratio for its class.
• Performance: The configuration leans toward a weatherly, close-winded performance profile typical of high-aspect masthead rigs.

Popular Sail Configurations

• Mainsail: Configurations typically vary between cross-cut cruising builds and high-performance racing layouts.
• Headsail: Owners generally favor a 135% to 150% genoa to maximize the large foretriangle, with high-clew options for offshore work.

Key Characteristics

• High-aspect mainsail (P/E 3.10) ensures superior upwind pointing and efficiency.
• Large foretriangle (I/J 2.94) enables powerful headsail configurations for light-air performance.
• Deep 1.76m draft and 3.15m beam provide the stiffness required to carry the 37m² sail plan.
• Predictable, stable handling characteristics suitable for short-handed coastal passages.

Sailing Considerations

• Recommended for a wind range of 8–22 knots; the tall rig benefits from early reefing to maintain an upright, efficient hull profile.
• Typical crew requirements range from 2 for cruising to 5 for fully competitive racing.
• Expect consistent momentum through tacks and excellent response in light-air transitions.

Sailmaking Recommendations

For the MIURA, we recommend SurgeX membrane sails as the optimal choice for most sailors. SurgeX uses continuous fiber construction where fibers are laid along specific 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, which is critical for the MIURA’s high-aspect mainsail.

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 3.10 P/E ratio, a radial fiber layout within the membrane works best to distribute loads from the head to the clew. A typical inventory includes a full-battened main, a 140% genoa, and a symmetric spinnaker. With 37m² of sail area, plan to take the first reef around 18 knots of true wind.

Conclusion

The MIURA’s rig dimensions and hull stability create a versatile and weatherly sailing platform. Explore high-performance SurgeX sail options for MIURA to maximize your boat's potential.