Many in-boom problems are caused by an uneven furl with the sail bunching at one end or the other. Inside the mast is an aluminium foil that takes the luff of the mainsail, and in a boom a mandrel takes the foot of the mainsail both the foil and the mandrel revolve to roll up the sail.Ī lot of issues with in-mast furling are caused by the sail not furling properly inside the mast and the furl being too bulky or the sail rubbing on the inside of the mast. Whether you have in-boom or in-mast, they both work on a similar principle which anyone with a furling genoa will be familiar with. ‘They’re mechanical systems and they need to be operated correctly.’ ‘Carefully,’ replies Jeremy White,of Elvstrøm Sails UK. In an age where we expect everything just to be simple and to work, letting off one line, and pulling another to make the mainsail appear or disappear sounds appealing, but what is the best way to furl the mainsail? Whether you’ve got a furling main on your own boat, or if you’ll be using one when you charter, it’s worth knowing how to avoid the pitfalls of furling mainsails. So has the reputation of furling mainsails been unfairly tainted, and are they more prone to user error, or have the systems ironed out the glitches? Hallberg Rassy reports that almost all new owners buying boats over 40ft opt for furling mainsail systems, with Discovery reporting a similar trend. In 2018, 38% of boats sailing round the world in the World ARC had furling mainsail. Get mainsail furling wrong and it can lead to costly and potentially dangerous problems.
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