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Tuning Guides -Â J/24Â Newport Design On the Water |
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True Wind Strength
(knots)
Uppers*
Lowers*
Comments
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Light
0-9
20
15
On long Olympic
courses we
sometimes use
this as an all-
purpose setting,
allowing for a
light breeze to
build and still
be in the rig
setting's range.
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Medium
10-13
24
21
Pre-bend is
reduced to
2 inches.
This allows
for necessary
backstay
tension and
resulting
headstay
tension
to begin
depowering
the rig in the
puffs.
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Medium Heavy
14-17
27
24
This setting
is one that we
use any time
significant
depowering is
necessary.
Lighter crews
will go to this
earlier and find
that they are
able to sail
flatter and faster
than if they stay
at 24 and 21.
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Heavy
18+
29
29
Whether at
the top end
of the 150 or
into the 100,
it's windy and
the backstay
needs to be
pulled on hard.
With this shroud
tension the
lowers have
pulled out nearly
all the pre-bend,
creating a very
stiff mast that
can be bent by
the backstay to
flatten the main.
The headstay in
turn gets
extremely tight
with the lowers
and backstay
forces working
against each other.Â
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= Large size "B" Loos Tension Gauge Scale.
See Tension Gauge Conversion Chart
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Tuning Guides - J/24 Newport Design - Upwind Sail Trim                    |
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Wind (knots)
Jib Selection
Genoa Foot
Inches from
chain plate
Genoa Leech
Inches from
spread tip
Jib Halyard
Tension
Outhaul
Inches from
band
Traveler/ Vang
Sheeting
Top Batten Twist
When top batten
points to windward,
leech is closed; when
twisting to leeward,
leech is open
Traveler
Backstay
Wire blocks,
inches pulled
down bridle |
0-4
150
Genoa
5
5
Wrinkles
2
Traveler
Parallel
to 5º
Clsd
Middle
Loose
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5-10
150
Genoa
3
3
Slight
wrinkles
1
Traveler
Parallel
to 5º
Clsd
3-6
6
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11-15
150
Genoa
2
2
Slight
wrinkles
0
Vang/
Traveler
Parallel
3-6
8-16
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16-19
100
Jib
6-8
6-8
Smooth
0
Vang/
Traveler
5º
open
8-12
20-30
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20-24
100
Jib
Use Jib
Use Jib
Smooth
0
Vang
5º
open
12-18
20 |
25+
100
Jib
Use Jib
Use Jib
Smooth
0
Vang
5º
open
12-18
24+
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