The definitive guide to in-boom furling from Advanced Rigging and Hydraulics

Furling mainsail systems have evolved dramatically over the past decade, with in-boom furling now standing out as the system of choice for sailors seeking a blend of safety, simplicity, and performance. Whether specified for a new build or retrofitted to an existing yacht, in-boom furling delivers clear advantages for both bluewater cruisers and performance sailors alike. 

Advanced Rigging & Hydraulics work closely with yacht owners to assess whether in-boom furling suits their sailing style and vessel configuration. Drawing on the team’s experience from hundreds of installations, here’s their expert guide to understanding how in-boom furling works and why it’s gaining popularity. 

Why yacht owners choose in-boom furling 

1. Effortless sail handling

Ease of handling is one of the major appeals of in-boom furling. With these systems, reefing and sail management can be done entirely from the cockpit - a significant safety benefit for short-handed or family crews.

Unlike in-mast furling, all mechanical parts are accessible from deck level, allowing for easier inspections, maintenance, and repairs without needing to go aloft. This makes the system not only safer but far more practical for long-distance cruising. 

2. Enhanced performance

Because in-boom furling accommodates full-length battens, it allows for a much more efficient sail shape, giving better control, balance, and power under sail. Compared to in-mast furling, where sail shape is more compromised, in-boom systems deliver a clear performance edge, particularly in light winds and upwind conditions. 

In-boom furlers are also less prone to jamming, as the sail rolls horizontally around a mandrel within the boom. And in the unlikely event of a mechanical issue, the sail can still be lowered manually - a crucial safety feature when sailing offshore. 

3. Safety and stability

With the weight of the mainsail stored low in the boom rather than aloft in the mast, the yacht benefits from a lower centre of gravity and improved stability. The sail is neatly protected from UV exposure and weather, eliminating the need for bulky sail covers and reducing long-term wear. 

What to consider before choosing an in-boom system

While the advantages are clear, an in-boom furling system requires thoughtful planning and professional execution. 

Expert installation is essential

Poor installation is the root cause of most system issues we encounter. Every yacht has unique rig geometry, so bespoke fitting and alignment are key. Advanced Rigging & Hydraulics’ installation process includes rig assessment, system tuning, and sea trials to ensure flawless operation. 

Learn your system

Even the most refined technology demands familiarity. Owners are encouraged to spend time learning the nuances of their system, ideally alongside the sailmaker and rigger who install it. Understanding furling angles, halyard tension, and boom positioning will make handling instinctive and prevent unnecessary wear.

Budget considerations

If you’re retrofitting, consider the full scope of work, including a new boom, vang, winch, and often a new mainsail. It’s an investment, but for serious sailors planning long passages or world cruising, the benefits in safety, comfort, and performance are well worth it. 

Leading in-boom furling systems

Advanced Rigging & Hydraulics supplies and install a range of proven, high-quality furling booms, each suited to different yachts and sailing styles, including Mailfurl, Leisure Furl and Hi-Low Reefer. 

Expert Installation and ongoing support

Selecting the right system is only part of the equation - professional installation and maintenance are what ensure years of smooth, trouble-free operation. 

Advanced Rigging & Hydraulics skilled riggers have worked on hundreds of in-boom furling installations across a wide range of yachts. Whether you’re commissioning a new build or retrofitting an existing yacht, the team provides bespoke advice, precise installation, and comprehensive servicing to keep your system performing at its best. 

For existing owners, inspection, maintenance, and tune-up services are offered to help identify potential issues before they become problems and ensuring continued reliability for bluewater voyages and ocean crossings. 

Ready to upgrade your sailing experience?

In-boom furling represents a significant step forward in comfort, safety, and ease of use at sea. For world cruisers and performance sailors alike, it’s an investment that transforms sail-handling - giving you the confidence to manage more sail area, more safely, with fewer hands on deck.

If you’d like to explore whether in-boom furling could enhance your yacht, contact Advanced Rigging & Hydraulics. Because when it comes to your mainsail, ease, control, and safety should always go hand in hand.