NORTH SAILS Mast Furling User manual

Step 1
Unpack your Sail
Begin by removing your North Sails Purchasers Pack including
your Quality Control and Warranty information. Reserve for
future reference. Locate and identify the battens (if any) and
reserve for installation later.
Step 2
Attach the Mainsail Tack
Begin by unrolling your mainsail on the side deck from lu to
leech. Lift the mainsail tack area and attach to your tack fitting.
Your new Mast Furling mainsail incorporates a North Sails
exclusive Rope Tack. This feature is designed to provide a soft and
easily furled corner attachment. The sail has less patching the
normal corner, but has the Spectra/Dyneema rope splayed and
sewn into the sail to proved strength.
Please ensure the tack rope is connected to a smooth hook or
shackle to ensure durability and that no chafing occurs.
NOTE: If your mainsail has a Crab Claw Cutaway and two
webbing attachment points – Please read the Stowaway
Mast Furling Mainsail installation guide.
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Congratulations on purchasing your new North Mast Furling Mainsail.
This guide is intended to help better understand the key construction
elements, usage and installation of your sail. If you have any questions
after reading this document and before installing your sail, please
contact your North Sails representative.
It is best to have two people installing the sail which can be
accomplished in less than one hour. Your boat needs facing directly
into the wind and ideally the wind speed should be less than 8 knots.
NORTH SAILS
MAST FURLING
INSTALL ATION GUIDE
Step 2

Step 3
Attach the Mainsail Clew
Lift the mainsail clew to the end of the boom and run the outhaul
line through the clew block. Depending upon the type of block
and the rigging of the outhaul, you may need to remove the block
sheave or the outhaul line stoppers to pass the outhaul through
the clew block.
Step 4
Attach the Mainsail Head
Lift the mainsail head to the mast and attach to the head of the
sail to furling head swivel. The mainsail head has the same rope
corner as the tack for ease of furling.
Step 5
Hoist the sail and insert Battens (if applicable)
If your mainsail has no battens, you can now hoist the mainsail all
the way and furl into the mast. If your mainsail has leech battens,
you will insert each batten as you hoist the sail. If your mainsail
has full length battens, you will assemble the battens before
hoisting the mainsail and then insert the battens after hoisting
following the leech batten procedure.
Leech Batten Installation
Most Mast Furling Mainsails with Leech Battens will include
Round Carbon Rod Battens. These untapered battens are sti to
support the leech and also able to slightly twist around the lu
extrusion for easy and compact furling. The leech battens should
be located on the inside of your furled sail so they do not impact
the mast gap edge hen furling and unfurling. Only sails with the
smallest gaps will include flat battens.
Your battens will be secure into the sail with a standard Velcro
leech closure. The leech (upper) end of the batten has a small
plastic cap taped on to fit compactly into the closed leech batten
pocket end. The bottom (lower) end of the batten has a custom
metal fitting changing the shape of the batten from round to flat
to best secure the batten in the sail.
NOTE: Please follow the Velcro Stu Batten Installation Guide
when inserting the Vertical Leech Battens as hoisting your sail.
Leech (Upper)Bottom (Lower)
Custom Joiner for Full Batten
Step 3
Step 4
Step 5
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Full length Batten Installation
If you have ordered a Mast Furling Mainsail with Full Length
Battens, you will have received your battens in segments, which
need to be assembled. Simply identify the segments from the
batten labels and screw together using the just joiner.
Furl the sail
When the sail is new, it will be stier than your old sail. Please keep
some tension on the outhaul when you are first furling the sail, to
train the patches to accept the furl. Take note to see if there are
any excessive wear points and that the battens are entering the
mast evenly and smoothly.
Leech Line
Your new Mast Furling Mainsail includes and Around the Clew
Leech Line. The leech line is not a sail shape control but an
essential tool to prevent leech flutter. The leech line will have a
purchase system and Velcro closure above the clew and a cleat
with in front of the clew. Your sail will either have micro-blocks or
a tunnel to direct the leech line around the clew. Use the leech line
to prevent leech flutter in higher wind speeds and when reefed.
Excessive leech flutters can cause serious sail damage.
Sail Shape Control
You can control the depth and position of draft in your new
mainsail by adjusting the halyard tension. A tighter halyard will
move the draft position further forward and result in a flatter sail.
When your sail is new, pull the halyard up just enough to remove
any horizontal creases along the lu. In stronger breeze you will
need more halyard tension.
Leech Line
Sail Shape Control
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