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Unless you remove your Jib at the end of every race event, there is a risk of the jib unfurling when least expected. the risk is highest when a strong wind passes through the area where your boat is moored. If you are lucky, your jib stays furled. If somewhat unlucky, only the jib sail is damaged. If seriously unlucky, your boat sinks at the dock.
Unless you remove your Jib at the end of every race event, there is a risk of the jib unfurling when least expected. the risk is highest when a strong wind passes through the area where your boat is moored. If you are lucky, your jib stays furled. If somewhat unlucky, only the jib sail is damaged. If seriously unlucky, your boat sinks at the dock.
To completely avoid the risk of damage to the jib sail or boat, always remove the Jib sail when departing the boat and leaving it unattended for an extended period of time. But this is extra work and consumes time. Use a strap or line to prevent the Jib Halyard line from "skying". Or running to the top of the mast and requiring retrieval. See pic below.
The next best solution is to use a strap or line to restrain the furled Jib sail.
Please note there are several subtle features in use as illustrated in the picture below.
The first feature is to thread the strap thru the clew of the sail. And then completely encircle the furled Jib sail. This serves the purpose of capturing and restraining the Jib sail. Even if the Jib blocks or Jib sheeting lines become uncleated or the lines fall off.
The second feature secures the strap to the Foredeck U-bolt. This eliminates the possibility of the furled Jib sail lifting up if the top part of the sail becomes unfurled. This will reduce the sail area presented to the wind. See pic at top of page for an example.
Well done to this J70 skipper!
Another option would be the use of a commercially available furling "Sock". These socks are sold to reduce UV damage to the sail. And they also do a great job preventing accidental unfurling of the Jib sail.
Harken offers a "Harken J/70 Jib UV Sock" product. https://www.harken.com/en/shop/j70/j70-uv-sock/
Please note there are several subtle features in use as illustrated in the picture below.
The first feature is to permanently attach a suitable length line to the sock bag. This insures you always have the line ready when the sock bag is installed.
Another feature is to add a clip on one end of the line to secure the zipper and prevent it accidently unzipping.
The other end of the line can be threaded thru the Jib clew (or the dogbone loops) and then attach it to the Foredeck U-bolt.
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