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Designed
to reef or furl your mainsail, the PROFURL in-boom system
provides safe reefing for your mainsail from the cockpit.
The main halyard and the reefing line can also be operated
from the cockpit.
Hoisting the mainsail is made easy: just turn the boat
into the wind, release the furling line and pull on
the halyard.
Reefing or furling is just as easy: simply control the
tension on the halyard and pull the furling line.
Thanks to a number of patented design features, controlling
your mainsail is a smooth operation.
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Click
to enlarge
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Simple
furling drum (patented)
Is located at the forward end of the boom (patented), requiring
only one block at the mast foot to lead the furling line towards
the cockpit: less blocks means less friction.
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Boom
section
Open boom section: allows easy fitting of the sail, avoids friction
on the edges - a disadvantage of other systems with semi-closed
boom profiles, allows the sail to be inspected from the deck
to ensure correct furling, and allows access to the main mechanical
components.
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Luff
extrusions (patented)
Are articulated behind the mast. The bottom end of the luff
extrusion is connected to the top of the boom, allowing it
to rotate with the boom. Whatever the angle of the boom with
the boat, the sail and the luff extrusions are always in perfect
alignment, this dramatically reduces luff tape friction and
wear.
Transferring the sail from the luff extrusion into the boom
(reefing or furling), or from the boom into the luff extrusions
(hoisting) is much easier than with other systems. This device
is unique because it does not require the boat to be head
to wind before operating the system.
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Furling
mandrel
Is what the sail is rolled around, it turns freely on oversized
graphite bushings at both ends and around high tensile stainless
steel pivot pins.
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Asymmetrical
luff grooves
(patented)
Reduce friction of luff tape when using the system. |
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PROFURL asymmetrical
luff groove :
Reduce friction. |
Standard luffgroove
:
When pulled backwards
(when the sail is flogging)
the luff tape tends to jam as it acts as a wedge in the
groove.
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Feeder
(patented)
Includes two large size bronze rollers which protect the luff
tape at all times.
The feeder allows for :
 accurate
adjustment of the distance between the two rollers to suit every
thickness, or type of luff tape,
quick adjustment
of the rollers for feeding the sail into the luff grooves,
bronze
rollers automatically return to the adjusted roller width.
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Sheave
box (patented)
The original halyard is normally used providing it is long enough
to reach the cockpit. PROFURL has developed a special upper
sheave box which allows the halyard to exit the original masthead
and leads it to the rear side of the luff extrusions. When the
luff extrusions turn in line with the boom, the design of the
sheave box allows the short length of halyard between the mast
head and the sheave box to be in alignment, again avoiding friction
and chafe on the mast head cheeks.
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Rigid
boom vang (patented)
Is standard with the system. It has been specially developed
by PROFURL because the mast-boom angle is absolutely essential
to the smooth furling of the sail. As soon as the mainsheet
is released, the PROFURL boom vang automatically repositions
the boom upwards to the correct reefing angle.
The PROFURL boom vang is compressed when using the mainsheet
to tension the leech of the mainsail.
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