Copyright © 2012 By Farrier Marine Page 16
FARRIER MARINE
than an equivalent monohull, but this may not be the
fastest way to windward. A good multihull is capable of
much higher speeds to windward than a mono, which
also brings the apparent wind forward, to where pointing
will be lower, but the speed to windward is much greater.
One thing to avoid is oversheeting the headsail, as
while pulling this on very tight will guarantee a good
pointing angle, the boat speed may be slow. The correct
way is to let the sheet out 1 - 2 “ from being tight on, so
that curve of the headsail leach matches the curve of the
mainsail. It should then not backwind the main, and your
pointing angle and boat speed should both be excellent.
Once you have achieved good boat speed, then
experiment by tightening sheets a little, pointing slightly
higher, while trying to maintain the same boat speed.
The mainsail traveller should be around 6" to wind-
ward in lighter conditions, then around the centerline in
moderate winds, and, as the wind increases, moved to
leeward slightly with more mainsheet tension being ap-
plied. In very strong winds the mainsheet should be
pulled on as tight as possible. Stand above it and pull it
on as hard as you can - most sailors don't have this tight
enough in strong winds. A tight mainsheet helps keep
forestay straight for good pointing ability.
If the jib is backwinding the main,
open the slot, by moving the traveller a
little more to center. Keeping an open
slot between jib and main is crucial to
good windward performance, as any back
winding of the main will choke the boat.
Equally as important, the jib must be
relatively flat with NO HOOK in the leach,
and not oversheeted. Leach battens are
highly recommended to keep the leach
flat.
If set up and sailed correctly, a Farrier
trimaran will match the windward ability
of the best monohull racers, 20 to 30%
larger. Pointing high and going fast is
one of the hardest things to achieve in
any boat, but with a little care and tuning
a Farrier design is one of the best.
The amount of rotation will depend on the type and
shape of mast, and can range from 35 to 90 degrees from
the boat centerline. A good rule of thumb is for the mast
to be rotated around 40 to 50 degrees more than the
boom.
40°
CLOSE HAULED WITH MAST AT 40°
RELATIV E TO BOOM
Avoid allowing the mast to rotate or swing back and
forth, which can happen in light winds combined with
waves, or when sailing off the wind with less sail pres-
sure. This is usually prevented by having the mainsheet
angled forward from the boom, which forces the boom
forward to keep the mast rotated when pulled tight.
The amount of mast rotation is controlled by a line to
the rotation arm on the mast from either the boom or the
deck. A line from the boom has the advantage of being
self-tacking, by maintaining the mast at a constant rota-
tion angle relative to the boom on all points of sail.
However, the control line will have to be detached from a
roller furling boom and transferred to an eye on the deck
when furling the main.
A control line from the deck is also self-tacking, but it
does not automatically adjust for different angles of sail.
It will thus need to be let out when bearing off. Some
racers like to fit two lines to the deck, one from each side
for absolute control, but this can also be just another
complication and is not necessary for general sailing. A
2 or 4 : 1 tackle is now recommended for the control line,
as the loads here can be high.
WINDWARD PERFORMANCE
All Farrier designs will point very high if set up and
sailed correctly, but this can also be very dependent on
the crew’s skill. It is possible to point just as high or higher
F-33 Mast Rotator Arm & attached to boom for self tacking
F-27 hard on the wind off San Francisco
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