Base Settings for 10-15 knots True Wind Speed
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| Headstay |
Mast Butt |
Max J |
Pre Bend |
Upper Shroud V1 |
Lower Shroud D1 |
Intermediate Shroud D2 |
| 2260mm |
460mm |
4050mm |
20mm |
52 Units |
27 Units |
15 Units |
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» Shroud tensions measured on RT-10 Loos gauge |
| » Download North's Quick Tune Card (pdf file, updated March 2010) |
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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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 © North SailsPre-Bend is measured at point of maximum deflection between S1 and S2 (left). |
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 © North SailsJ Dimension is measured from intersection of stem at shear to forward face of mast (left.) |
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Shroud Adjustments Matrix
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| True Wind Speed |
Upper Shroud V1 |
Lower Shroud D1 |
Intermediate Shroud D2 |
| 0-5 knots |
-3.5 turns |
-3 turns |
-2 turns |
| 6-10 knots |
-3 turns |
-2 turns |
-1 turn |
| 10-14 knots |
Base 52 |
Base 27 |
Base 15 |
| 15-18 knots |
+2 turns |
+1.5 turns |
+1.5 turns |
| 19-21 knots |
+3 turns |
+2 turns |
+2 turns |
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