In-boom furling systems have steadily gained popularity among cruising and performance cruising sailors seeking the perfect balance between ease of handling and sailing performance. To help sailors understand the benefits and considerations of this setup, we asked expert Maxim Logutenko from the Quantum Newport loft to share his insights.
Why Choose In-Boom Furling?
"In-boom furling allows for a mainsail with a full roach and even full battens, similar to a performance racing sail," Maxim explains. "This makes it an ideal solution for performance cruisers who want both ease of handling and better sailing performance."
By contrast, in-mast furling requires compromises in sail shape. "It typically requires a negative roach leech and doesn't support battens, which limits power and efficiency," Maxim notes. "However, it's the most convenient option for cruisers who prioritize comfort and simplicity over performance."
Boat Size Considerations
While in-boom furling systems can technically be installed on a wide range of boats, Maxim advises, "They are most practical and cost-effective on yachts 50 feet and above. At this size, the benefits in handling, sail shape, and reefing efficiency begin to outweigh the higher cost and added complexity."
For boats under 50 feet, he recommends alternatives: "A Sail Pack with Lazy Jacks is often a better choice. It's more affordable, simpler to install and maintain, and still provides excellent convenience for cruising sailors." In-boom furling is especially suited to performance cruisers, high-end cruising yachts, and certain multihulls—any vessel where both sailing performance and ease of handling are priorities.
Choosing the Right Sail Material
Maxim emphasizes the importance of selecting the right material for in-boom furling: "Most modern sail materials can be used, but it's important to choose one that holds its shape well under load. We generally do not recommend low-aspect Dacron, as it tends to stretch over time and won't deliver the performance or longevity you expect from an in-boom furling setup."
For best results, he suggests, "Using a Tri-radial cut sail or opting for Quantum's Fusion M. These options offer superior shape retention, durability, and performance — especially important when furling inside a boom where precision is key."
Tips for a Smooth Furl
Maxim shares three key tips for ensuring a tight, even furl on an in-boom system:
- Follow the manufacturer's guidelines: "Every in-boom furling system is slightly different. Always refer to the specific instructions provided by the boom manufacturer to ensure proper operation."
- Maintain the correct boom angle: "The most critical factor for a smooth furl is keeping the boom at the proper angle, usually around 87 degrees to the mast. Marking the vang at this ideal angle makes repeat setup easier and more consistent."
- Head directly into the wind: "Whether furling or unfurling, it's crucial to keep the boat pointed straight into the wind. Any side load on the sail can cause uneven rolling or jamming inside the boom."
In-boom furling offers a compelling mix of performance and convenience, but it's not a one-size-fits-all solution. Sailors should weigh factors like boat size, budget, and sailing goals when deciding if it's the right choice. If you're considering upgrading or retrofitting your boat with in-boom furling, working closely with your sailmaker and rigging team is essential to ensure a system that works flawlessly under sail.