Any time sail handling is a challenge a hydraulic furling boom is a great solution. An internal mandrel spins by hydraulic power, cleanly stowing the mainsail away inside the carbon fiber boom shell. Offshore understands that safety means not only structural strength but also proper function at the critical moments. Our high standards of design and manufacture ensure that our booms will function flawlessly.
A hydraulic motor is housed within the inboard end of the furling mandrel. This
installation method has many advantages over conventional mandrel driven furling booms. For one the Offshore Spars electric furling boom does not require any holes be cut in the mast. With a carbon or aluminum mast putting large holes in the mast near the Gooseneck is a structural concession and not something we believe is a good idea. The other major advantage to an inboard end mandrel mounted motor is the weight placement of the electric motor. Other furling boom manufacturers place their motors at the outboard end of the boom which creates a large moment arm when in rough seas or gybing. Our belief is that motor which is the heaviest single component in the boom should be mounted as close to the support and pivot point as possible to reduce and unnecessary moments.
Hydraulic Furling Boom Outboard End
A simple spherical outboard bearing is low maintenance and very reliable. Our in house designed and build spherical bearings can take very high
loads and allow for both rotational and angular moments of the mandrel. These multiple degrees of freedom ensure that the mandrel will be properly supported and fully operational under a wide variety of conditions.
Furling Boom Rollers and Foot Track
A key feature of a furling boom is the rollers which serve as a way to guide the sail into the boom shell and help retain the mandrel when the sail is reefed. Our roller assemblies are built using high strength carbon fiber ribs which also help stiffen the boom section. Depending on the boom the rollers are made from a combination of stainless steel and Delrin to ensure a high load and low maintenance feature.
In order to aid furling a bolt rope foot track is installed in the middle of the mandrel. The track is installed at a 30 degree angle ahead of the furl direction, this allows the mandrel to start pulling on the foot of the sail before the tack and clew lashings tension and furl.
Hardware and Customization
Like all Offshore Spars products hydraulic furling boom uses only the best hardware the marine industry has to offer as well as a wide variety of customization. We at Offshore Spars realize that every boat is different and that every skipper sails to a certain style. We make sure to research both of these aspects and customize our product to be the best fit for the customer. Some common boom customization options can be found in the below list.
- Boom light locations, count, and color temperature.
- Paint color
- Internal or external mainsheet, aft or mid boom sheeting.
- Internal or external preventer.