ROCKET 55 Sail Configuration Guide

Overview

The ROCKET 55 is a high-performance sailing yacht designed by Simonis, balancing aggressive racing capabilities with offshore cruising potential. This 16.44-meter vessel is engineered for owners who prioritize speed and efficiency across a range of sea conditions.

Rig Specifications & Performance Analysis

• Mainsail Configuration: A P/E ratio of 2.78 indicates a moderate-to-high aspect rig, balancing aerodynamic efficiency with manageable boom lengths.
• Foretriangle Design: The I/J ratio of 2.96 is optimized for high-aspect headsails, favoring close-winded performance and efficiency in upwind beats.
• Sail Area: 123m² total upwind area provides a high power-to-displacement ratio for a 16-meter hull.
• Performance: The combination of a 2.80m draft and tall rig makes this design exceptionally weatherly and fast in light-to-moderate airs.

Popular Sail Configurations

• Mainsail: Typically configured as a full-battened powerhead main to maximize the 19.88m luff.
• Headsail: Most configurations utilize a non-overlapping high-aspect jib or a moderate-lap genoa for versatile performance.

Key Characteristics

• P/E Ratio 2.78: Delivers a tall, efficient sail plan for superior lift and reduced drag.
• I/J Ratio 2.96: Optimized for modern, high-aspect headsail handling and pointing ability.
• 2.80m Draft: Provides the necessary righting moment to support the 123m² upwind sail plan.
• Simonis Heritage: Ensures a hull and rig geometry focused on hydrodynamic and aerodynamic synergy.

Sailing Considerations

• High-aspect rigs require precise backstay and halyard tension to manage sail entry and forestay sag.
• Recommended for experienced crews due to the powerful 71m² mainsail.
• Performance expectations include early planing potential and high average speeds on reach-to-reach legs.

Sailmaking Recommendations

For the ROCKET 55, 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 2.78 P/E ratio, a tri-radial fiber layout works best to handle the vertical loads of the tall mainsail. A typical inventory includes a performance mainsail, a Code 0 for light air, and a high-aspect jib. With 123m² of sail area, plan to reef around 18-20 knots of true wind speed.

Conclusion

The ROCKET 55 is a sophisticated performance platform that rewards precise sail trim and high-modulus materials. Explore sail options for ROCKET 55 to maximize your yacht's potential.