TUNINg gUIDe - North Sails

SOLUTIONS FOR TODAY’S SAILORS
J/88
Tuning Guide
J/88 Tuning Guide
Contents
Initial Headstay Set-up..................................................... 3
Onboard Headstay Adjustment........................................ 5
J/88􀀃Tuning􀀃Guide􀀃............................................................ 7
Sailing Setup...................................................................... 8
North Sails Tips for J/88................................................... 9
Jib Leech Spreader Marks............................................... 10
Upwind Sailing.................................................................11
Downwind Sailing........................................................... 12
Advanced CSD Sail Analysis........................................... 13
Worldwide Sail Care....................................................... 17
W
e hope you enjoy your J/88 Tuning Guide.
North class representatives and personnel
have invested a lot of time to make this guide as
helpful as possible for you. Tuning and trim
advice offered here has been proven over time
with top results.
North has become the world leader in sailmaking
through an ongoing commitment to making
sails faster, lighter and longer lasting. We are
equally committed to working as a team with
our customers. Updates
As always, if you have any questions or
comments we would love to hear from you.
Please contact your CSD class representative.
Sincerely,
North Sails is constantly refining tuning techniques and
rig settings as we and our customers gain experience in
individual classes. This information is shared among
North staff worldwide.
While this tuning guide provides a giant step toward
achieving competitive speed in your class, be sure to
contact your North representative about the latest J/88
tuning developments.
Ken Read, President North Sails Group
© 2014 North Sails.
May not be reproduced without permission.
2
J/88 Tuning Guide
Initial Headstay Set-up
Method 1:
Pin-to-Pin
Before attaching the
headstay lay it out flat and
straight on the ground.
Measure the height from
the deck to the center of the
roller pin pennant sticking
up through the deck.
Measure from the center
of the upper headstay pin
to the center of the lower
headstay pin. This length
plus the height above deck
of the lower pin should be
12.073m (39.61').
W
e are going to describe the steps to help you
set up your new J/88 to the North Sails BASE
settings. These settings will enable you to be
competitive the first time you go sailing. Later we
will offer additional suggestions to help you
optimize your J/88 for specific sailing conditions.
It’s a good idea to keep an accurate, ongoing log of
your boat’s specific measurements (within tolerances
allowed by the class) for reference to the North
BASE settings. Ultimately you will develop your
own settings that work with the way you drive and
sail your boat in different wind and wave conditions.
Don’t be intimidated. The initial setup can be
accomplished in as little as one hour’s time.
■■
Attach the headstay to the
mast and raise the mast.
■■
Attach the headstay and
each upper (cap) shrouds
to the deck.
■■
Tighten the caps shrouds
hand tight +2 full turns.
■■
Measure up from each
cap shroud pin 1m (3.28')
and make a mark on the
shroud.
■■
Attach a full bucket of
water to the center line
headsail halyard, cleat the
halyard with the bucket
over the side of the boat
just above the water line.
■■
Mark the halyard where
it intersects with the
previous mark on the
shroud.
You’ll need the following:
30m (100') tape measure
■ Rig adjustment tools
■ WetNotes book
■ Safety harness / boatswains chair
■ North Sails J/88 Tuning Guide
■ A crew of five or six to go sailing.
■
© 2014 North Sails.
May not be reproduced without permission.
3
Target mark above shows the
center location of the upper
pin. Pin-to-Pin measurement
= 12.073m (39.61').
Arrow and target mark above
show the location of the lower
pin for the Pin-to-Pin Method.
J/88 Tuning Guide
■■
Leaving the halyard cleated, lift the bucket over to the
other side of the boat and determine if the halyard
mark intersects with that shroud mark.
■■
Moving the bucket side to side adjust the cap shrouds
plus or minus until the halyard/shroud marks
intersects on both port and starboard sides. This
centers the hounds.
■■
Check and if necessary adjust the headstay so that the
length, as noted on page 3, is 12.073m (39.61').
Method 2 - ARC Measurement
If the mast is already in the boat use the ARC method to
obtain the correct headstay length. Using the centerline
headsail halyard pull it tight to the front of the mast
plate/deck interface. Using the same pressure on the
halyard swing it out to the headstay and make a mark on
the headfoil. Measure from this headfoil mark down to
the ARC location on the roller cover.
Lower ARC location measurement point for Method 2.
Adjust the headstay turnbuckle so that the distance
from the headfoil mark down to the roller cover is 82cm
(2.69"). This is our BASE headstay length.
After adjusting the headstay, check and adjust the side
shrouds to get the Loos Gauge numbers recommended
on page 7, Loos PT-2 Readings table.
NOTE: When checking the Loos Gauge numbers make
sure there is no backstay or halyard tension altering the
load gauge number results. See Tuning Guide on page 7.
Method 2:
ARC Measurement
"ARC" method measurement points noted above and below.
Method 1:
Pin-to-Pin
Measurement
ARC
measurement =
82cm (2.69").
Lower measurement points for the two methods of
obtaining headstay lengths.
© 2014 North Sails.
May not be reproduced without permission.
4
J/88 Tuning Guide
Onboard Headstay
Adjustment
Adjusting the headstay length on board:
Have extra cotter pins on hand to replace used ones
at base of unit and for turnbuckle. Determine if the
turnbuckle is located below deck or inside torque tube.
If it's located inside, follow these steps:
■■
Rig a screw catcher.
■■
Hold foils and loosen torque tube screws until you
can pull clamp part way out in order to lower foils.
■■
Lower foils.
■■
Remove the three screws at the base of the
torque tube.
Start by loosening, but do not remove, the top four Allen screws.
Remove the three screws at the base of the torque tube.
Note the three tools needed to make a headstay adjustment.
Content courtesy of Harken, Inc.
© 2014 North Sails.
May not be reproduced without permission.
5
J/88 Tuning Guide
Use a halyard to keep the headfoil above the adjustment
turnbuckle when adjusting.
Adjust turnbuckle.
CAUTION! To avoid injury, make sure drum
assembly and foils are securely lifted using
a halyard before adjusting turnbuckle.
Check location of turnbuckle. It may be below deck
under the hub assembly. If it is inside the torque tube,
follow this procedure: slide torque tube onto foil and
clamp just below top of feeder gap as shown. Use
halyard to lift foil assembly.
Reassemble torque tube to lower unit. Lift foils so top
is 11mm (7/16") below upper terminal. Slide foil clamp
into foil notches and tighten screws to secure.
Content courtesy of Harken, Inc.
© 2014 North Sails.
May not be reproduced without permission.
6
J/88 Tuning Guide
J/88􀀃Tuning􀀃Guide􀀃
North Sails BASE Setup for 10-12 kts
Loos􀀃PT-2􀀃Readings
Caps / Uppers
Intermediates / D2s
Lowers / D1s
TWS
D1
D2
V
35
15
7
6 kts
􀍲6" twirl
􀍲8
30
BASE 11 kts
7
15􀍲
35
15 kts
15
20
38
20 kts
21
28
43
J/88 VPP Upwind
TWS
TWA
Boat Speed
Heel
6 kts
43
4.69
4
8 kts
41
5.61
9
10 kts
39
6.19
21
TWS􀀃
D1
D2
V
12 kts
37
6.34
23.5
6 kts
􀍲-5
-3
􀍲-3
14 kts
35
6.42
24.5
BASE 11 kts
􀍲0
􀍲0
􀍲0
16 kts
34
6.47
26
15 kts
1.5
2
3
20 kts
3
4
5
Number􀀃of􀀃Full􀀃Turns􀀃from􀀃BASE
J/88 VPP Downwind
Wire Style
TWS
TWA
Boat Speed
Heel
6 kts
143
4.74
12
D1
D2
V
8 kts
144
5.80
12
6􀀃Dyform
5􀀃Dyform
6􀀃Dyform
10 kts
149
6.38
12
12 kts
158
6.59
12
14 kts
165
6.78
12
16 kts
168
7.12
12
© 2014 North Sails.
May not be reproduced without permission.
7
J/88 Tuning Guide
Sailing Setup
Headsail Inhaulers
17+
kts
11-16 kts
8-12 kts
6-9 kts
Location of the headsail clew inboard in different wind speeds.
Below: Photo shows degrees of
sheeting angles with the grab rail
at approximately 8.5 degrees.
Above: Jib sheeting angles will be subject to the amount of chop.
With more waves the set-up should have more headsail twist.
© 2014 North Sails.
May not be reproduced without permission.
8
J/88 Tuning Guide
North Sails Tips for J/88
It is very important to make sure the backstay is the
correct length so that at maximum tension the lower
block and backstay purchase does not restrict the amount
the tiller can turn.
Attach the asymmetric tack as close as possible to the fitting
so the maximum luff length of the sail projects well and is
more stable in chop. Use the full distance from the tackline fitting to the asymmetric halyard shackle for the sail.
Clean J/88 cockpit showing a loose backstay.
The latest pole and fitting giving the asymmetric tack downhaul
a 2:1 purchase system.
Don't forget to use your North Canvas mainsail cover to protect the sail.
© 2014 North Sails.
May not be reproduced without permission.
9
J/88 Tuning Guide
Jib Leech Spreader Marks
A
B
From mast track centerline:
A: Top spreader jib leech mark 640mm (25.20").
B: Bottom spreader jib leech mark 850mm (33.47").
Look closely at the spreaders, the white marks are located where
suggested above. Headsail clew is inhauled to the grab rail.
© 2014 North Sails.
May not be reproduced without permission.
10
J/88 Tuning Guide
Upwind Sailing
Crew weight will have to be coordinated to help the trimmers keep optimum heel angle both upwind and downwind.
Note the bow knuckle kissing the water (left), and in the Key West photo (right) the weight is distributed side to side to
maintain the correct heel angle.
© 2014 North Sails.
May not be reproduced without permission.
11
J/88 Tuning Guide
Downwind Sailing
Notice how straight and vertical the sail flies with little heel on
the boat. Maximum downwind heel in almost all conditions is
12 degrees.
The J/88 should sail well downwind with a large asymmetric.
Weight placement fore and aft is crucial to obtain optimum angles
and speed.
© 2014 North Sails.
May not be reproduced without permission.
12
J/88 Tuning Guide
Advanced Sail Analysis Software
File Name: Main8TWSnoBack.jpg
Advanced CSD Sail Analysis
Advanced
Sail Analysis
Software
Dacron Radial
CSD Mainsail
8 kts TWS
< Comments >
2014/05/06 08:53:08
TWS
Hull
J/88 Charleston race Week
8
RUD
--
TWA
--
TAB
--
Helm
--
AWS
File Name: Main8TWSnoBack.jpg
AWA
Main
Radial
--
LWY
--
--
FSTY
--
Genoa
--
TWD
--
HEEL
--
HDG
Hull
J/88 Charleston race Week
TWS
BSP
---8
< Comments >
Mast
-Very
little backstay
Helm
-- on
2014/05/06 08:53:08
RUD
--
TWA
--
TAB
--
AWS
--
LWY
--
Main
Radial
AWA
--
FSTY
--
Genoa
--
TWD
--
HEEL
--
HDG
--
BSP
--
Very little backstay on
Ver.5.610, Copyright (North Sails Japan)
CAMBER
16.0
DRAFT
45.0
TWIST
15.0
10.0
14.0
5.0
Ver.5.610, Copyright (North Sails Japan)
40.0
12.0
0.0
CAMBER
16.0
10.0
14.08.0
0
20
40
60
80
ENTRY
70.0
12.0
60.0
DRAFT
45.0
100
35.0
0
-10.0
40.0
20
60
80
EXIT
10.0
-10.0
100
0
5.0
90.0
20
70.0
20.0
60.0
10.0
50.0 0
10.0
40
0
60
80
ENTRY
20
20
-15.0
35.0
0
100
-10.0
40
SailType; MAIN
Height
25.0
50.0
75.0
20.0
40
60
80
60
80
60
80
100
-5.0
40.0
8.0
0
30.0
30.0
20
FORE_CAM
0.0
10.0
50.0
40.0
TWIST
15.0
-5.0
40
40
60
80
-15.0
CAMBER
12.2
15.1
15.0
60
DRAFT
43.0
41.6
39.7
80
© 2014
NorthMAIN
Sails.
SailType;
Heightwithout
CAMBER
May not be reproduced
permission.
25.0
50.0
75.0
12.2
15.1
15.0
-20.0
100
0
-20.0
100
0
DRAFT
43.0
41.6
39.7
20
40
60
80
80.0
-10.0
100
0
EXIT
20
TWIST
0.4
3.7
7.6
20
TWIST
0.4
3.7
7.6
60
80
ENTRY
27.0
36.7
49.2
40
60
80
13
ENTRY
27.0
36.7
49.2
100
70.0
0
70.0
EXIT
-17.3
-16.2
-13.4
40
20
40
Blue ... Actual
FORE_CAM
76.8
73.8
80.8
80.0
EXIT
-17.3
-16.2
-13.4
100
20
100
FORE_CAM
90.0
40
--
Mast
0
20
40
Blue ... Actual
FORE_CAM
76.8
73.8
80.8
100
BACK_CAM
66.0
62.0
67.4
60
80
100
BACK_CAM
66.0
62.0
67.4
AdvancedJ/88
SailTuning
Analysis
Software
Guide
File Name: CSDRaceMode8TWS.jpg
< Comments >
Advanced
Sail Analysis
Software
CSD 3DL Headsail
8 kts TWS
2014/05/06 08:51:26
Hull
J/88 Charleston Race Week
TWS
8
RUD
--
Mast
--
TWA
--
TAB
--
Helm
--
AWS
--
LWY
--
Main Dacron Radial AWA
--
FSTY
--
Genoa
CSD 3DL HeadsailTWD -File Name: CSDRaceMode8TWS.jpg
HEEL
--
< Comments >
HDG
--
BSP
--
Hull
J/88 Charleston Race Week
TWS
8
Racing in Charleston Race Week
Mast
-TWA -Helm
--
2014/05/06 08:51:26
RUD
--
TAB
--
AWS
--
LWY
--
Main Dacron Radial AWA
--
FSTY
--
Genoa
CSD 3DL HeadsailTWD
--
HEEL
--
HDG
--
BSP
--
Racing in Charleston Race Week
Ver.5.610, Copyright (North Sails Japan)
CAMBER
20.0
55.0
DRAFT
TWIST
40.0
35.0
50.0
30.0
15.0
45.0
25.0
40.0
20.0
Ver.5.610, Copyright (North Sails Japan)
10.0
20.0
CAMBER
5.0
15.0 0
70.0
20
40
60
80
ENTRY
10.0
60.0
5.0
0
50.0
20
40.0
60.0 0
20
40
SailType; HEAD
Height
25.0
50.0
75.0
50.0
40.0
40
60
80
ENTRY
70.0
0
20
40
60
80
55.0
35.0
DRAFT
50.0
30.0
100
0
45.0
20.0
20
15.0
40.0
10.0
35.0
40
60
80
EXIT
5.0
10030.0 0
25.0
100.0
15.0
40.0
20.0
10.0
35.0
5.0
15.0
30.0
0.0
100
0
-5.0
20.0
-10.0
15.0
-15.0
10010.0 0
20
40
60
80
EXIT
20
10.0
90.0
5.0
100
0
40
60
80
100
60
DRAFT
0.0
35.4
33.7-5.0
44.2
-10.0
80
-15.0
100
0
TWIST
13.3
20.6
29.9
20
ENTRY
54.3
65.5
66.9
40
60
80
80.0
80.0
50.0
75.0
14.0
14.8
DRAFT
35.4
33.7
44.2
TWIST
13.3
20.6
29.9
ENTRY
14
54.3
65.5
66.9
EXIT
-5.4
3.2
9.7
40
60
80
100
20
40
60
80
100
20
40
60
80
100
Blue ... Actual
FORE_CAM
88.6
86.0
87.7
90.0
SailType; HEAD
Height CAMBER
© 2014 North Sails.
25.0 without
11.9permission.
May not be reproduced
0
EXIT
-5.4
3.2
9.7
100
20
FORE_CAM
FORE_CAM
100.0
5.0
CAMBER
11.9
14.0
14.8
TWIST
0
20
40
Blue ... Actual
FORE_CAM
88.6
86.0
87.7
BACK_CAM
69.3
62.7
66.0
60
80
100
BACK_CAM
69.3
62.7
66.0
Guide
AdvancedJ/88
SailTuning
Analysis
Software
File Name: J88 Dr Laura Sail check 4-4-14 (29).JPG
< Comments >
Advanced
Sail Analysis Software
CSD 3Di Mainsail
2014/05/06 08:48:47
Hull J/88 West Coast TWS
--
RUD
--
Mast
--
TAB
--
--
TWA
Helm
-AWS
-LWY
-File Name: J88 Dr Laura
Sail
check
4-4-14
(29).JPG
Main
3Di
AWA
-FSTY
-3Di
TWD
--
< Comments >
Genoa
HDG
--
BSP
Hull J/88 West Coast TWS
HEEL
--
2014/05/06 08:48:47
--
RUD
--
--
TWA
--
TAB
--
--
AWS
--
LWY
--
Main
3Di
AWA
--
FSTY
--
Genoa
3Di
TWD
--
HEEL
--
HDG
--
BSP
--
Mast
Sail Check
Helm
Sail Check
Ver.5.610, Copyright (North Sails Japan)
CAMBER
12.0
DRAFT
50.0
TWIST
20.0
15.0
10.0
10.0
12.0 8.0
CAMBER
10.0 6.0 0
20
40
60
80
100
45.0
ENTRY
40.0
0
5.0
8.0
20
40
60
80
EXIT
5.0
20.0
0.0
15.0
-5.0
10010.0 0
80.0
5.0
TWIST
20
40
60
80
100
60
80
100
60
80
100
FORE_CAM
0.0
0.0
30.0
6.0
0
20.0
40.0
20
40
60
0
80
5.0
-15.0
20
40
SailType; MAIN
Height
25.0
50.0
75.0
20.0
-5.0
45.0
100 -10.0
0
ENTRY
10.0
30.0
0
10.0
DRAFT
50.0
Ver.5.610, Copyright (North Sails Japan)
20
40
60
80
CAMBER
9.1
10.9
10.2
60
80
SailType; MAIN
Height CAMBER
© 2014 North Sails.
25.0
9.1
50.0 without
10.9 permission.
May not be reproduced
75.0
10.2
0.0
-20.0
100
0
-5.0
20
DRAFT
47.2
47.4
46.6
60
80
100
EXIT
40
60
TWIST
3.7
9.2
13.5
20
TWIST
3.7
9.2
13.5
-5.0
0
40
80
ENTRY
19.6
27.5
32.9
60
80
ENTRY
19.6
15
27.5
32.9
100
70.0
0
EXIT
-12.3
-8.0
-2.6
100
70.0
EXIT
-12.3
-8.0
-2.6
20
40
FORE_CAM
80.0
20
DRAFT
-10.0
47.2
47.4
-15.0
46.6
-20.0
100
0
40
0
20
40
Blue ... Actual
FORE_CAM
72.7
71.1
74.4
20
40
Blue ... Actual
FORE_CAM
72.7
71.1
74.4
BACK_CAM
68.7
68.4
68.9
60
80
100
BACK_CAM
68.7
68.4
68.9
ed Sail AnalysisJ/88
Software Guide
File Name: J88 Dr Laura Sail check 4-4-14 (8).JPG
Advanced SailTuning
Analysis Software
File Name: J88 Dr Laura Sail check 4-4-14 (8).JPG
Advanced Sail Analysis Software
CSD 3Di Headsail
File Name: J88 Dr Laura Sail check 4-4-14 (8).JPG
< Comments >
2014/05/06 08:50:20
Hull J/88 West Coast TWS
--
RUD
<-- Comments >
Mast
--
TWA
--
TAB
Helm
--
AWS
--
LWY
Main
3Di
AWA
--
FSTY
Genoa
3Di
TWD
--
HEEL
HDG
--
-Hull J/88 West Coast TWS
-Mast
-TWA
-Helm
-AWS
-Main
3Di
AWA
BSP
--
Genoa
3Di
< Comments >
2014/05/06 08:50:20
--
RUD
--
--
TAB
--
--
LWY
--
--
FSTY
--
TWD
--
HEEL
--
HDG
--
Hull J/88 West CoastBSP
TWS
Sail Check
2014/05/06 08:50:20
----
RUD
--
Mast
Sail Check
Helm
--
TWA
--
TAB
--
--
AWS
--
LWY
--
Main
3Di
AWA
--
FSTY
--
Genoa
3Di
TWD
--
HEEL
--
HDG
--
BSP
--
Ver.5.610, Copyright (North Sails Japan)
Sail CheckCopyright (North Sails Japan)
Ver.5.610,
BER
MBER
DRAFT
55.0
TWIST
35.0
CAMBER
15.0
55.0
DRAFT30.0
35.0
25.0
30.0
20.0
25.0
50.0
50.0
45.0
10.0
15.0
40
RY
45.0
55.0
40.0
CAMBER
60
5.0
0
10.0
70.0
80
100
35.0
0
5.0
40
20
20
40
60
80
EXIT
ENTRY
40
EAD
Height
25.0
50.0
75.0
20
40
-5.0
70.0
50.0
ENTRY
60
60.0
40.0
80
0
0
60
-10.0
100
0
20
40
20
40
80
20
60
40
80
TWIST
12.0
CAMBER
17.3
10.1
24.3
12.7
13.4
60
80
© 2014
North HEAD
Sails.
SailType;
May not be reproduced
without
permission.
Height
CAMBER
25.0
50.0
75.0
80
100
10.1
12.7
13.4
10.0
0.0
35.0
100
0
5.0
-5.0
CAMBER
DRAFT
SailType; HEAD
10.1
37.2
50.0
Height
12.7
38.8
25.0
13.4
45.9
50.0
75.0
40.0
40.0
5.0
50.0
0
60
80
100
35.0
100
0
20 100.0
40
45.0
5.0
EXIT
Ver.5.610, Copyright (North Sails Japan)
20.0
35.0
TWIST
15.0
30.0
10.0
20
40
6025.0 80
100
5.0
60
80
100
0
20
40
60
FORE_CAM 20.0
100.0
FORE_CAM
15.0
40.0
0.0
60.0
5.0
0
15.0
DRAFT10.0
TWIST
90.0
20
-10.0
100
0
DRAFT
37.2
38.8
45.9
60
80
5.0
100 90.0 0
EXIT
60
80
0.0
-10.0
100
0
ENTRY
56.8
-5.0
DRAFT
67.2
37.2
66.7
38.8
45.9
40
100
20
80.0
40
EXIT
-6.3
TWIST
-6.5
12.0
-1.9
17.3
24.3
20
TWIST
12.0
17.3
24.3
20
40
0
20
40
60
80.0
60Blue ... 80
Actual 100
FORE_CAM
88.5
ENTRY
91.0
56.8
90.6
67.2
66.7
60
80
16ENTRY
56.8
67.2
66.7
80
80.0
EXIT
-6.3
-6.5
-1.9
60
80
100
100
0
20
90.0BACK_CAM
70.3
EXIT
71.9
-6.3
70.2
-6.5
-1.9
100
40
FORE_CAM
100.0
0
40
60
Blue ... Actual
FORE_CAM
88.5
91.0
90.6
20
40
Blue ... Actual
FORE_CAM
88.5
91.0
90.6
80
100
BACK_CAM
70.3
71.9
70.2
60
80
100
BACK_CAM
70.3
71.9
70.2
Worldwide Sail Care
At North Sails, we view each sail purchase as the beginning of a long and rewarding relationship. We base
this expectation on a strong service commitment that includes preventive maintenance, sound advice,
education and expert repairs. Your nearby North loft offers a wide range of services including...
■
■
Annual checkover
Sail washing
Winter storage
■ Sail tune-up
■
Retrofitting
n Seminars
n ■ Educational
resources
North Sails is a network of more than 100 lofts in 34 countries around the world. Each offers
knowledgeable, friendly, personal sales and service. Our size and worldwide reach also means North has
the world’s most expansive sailmaking database. It would be hard to find a sailboat for which we cannot
make a fast, durable and long lasting sail.
www.northsails.com
Visit the North Sails Class Sail Development website at:
http://na.northsails.com/CSD.aspx
J/88 Class website: www.jboats.com/j88

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