North Sails' J/109 Tuning Guide
Base Settings for 10-15 knots True Wind Speed
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| Headstay |
Mast Butt |
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Upper Shroud V1 |
Lower Shroud D1 |
Intermediate Shroud D2 |
| 2220mm |
480mm |
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55 Units |
45 Units |
24 Units |
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 © North SailsHeadstay is measured using swing arc method. Use jib halyard pulled down to top of black band on mast - swing forward to mark headstay. Measure distance from mark on headstay to deck at stem. |
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 © North SailsThe mast butt is measured from forward face of mast to aft edge of bulkhead. This corresponds to forward most position in the slider. |
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Shroud Adjustments Matrix
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True Wind
Speed |
Upper
Shroud
V1 |
Lower
Shroud
D1 |
Intermediate
Shroud D2 |
0-10 knots
11-20 knots
20+ knots
|
-1 turn
Base 55
+2 turns
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-1 turn
Base 45
+1/2 a turn
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-1 turn
Base 24
+2 turns
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If you have any questions on rig setup please contact James Knight
james@gb.northsails.com