IRREVERSIBLE
ESP WESTERLY LB 31Sail number ESP/ESP11061_C
GPH
763.9
OSN
738
LOA
9.39 m
Displacement
6960 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.5176
Medium
0.7174
High
0.854
Triple Offshore
Low
0.669
Medium
0.8932
High
1.0238
Boat Specifications
Dimensions
- Length overall
- 9.39 m
- Beam
- 2.91 m
- Draft
- 1.56 m
- Displacement
- 6960 kg
- Crew weight
- 160 kg
- Wetted surface
- 24.89 m²
Sails
- Mainsail
- 18.48 m²
- Genoa
- 35.75 m²
- Spinnaker
- 68.9 m²
- Asymmetric spinnaker
- 0 m²
Design
- Type
- WESTERLY LB 31
- Builder
- WESTERLY
- Designer
- Jack Laurent Giles
- Year built
- 1971
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 4.13 | 4.41 | 4.6 | 4.55 | 4.57 | 4.44 | 3.99 | 3.44 |
| 8 | 4.92 | 5.19 | 5.4 | 5.38 | 5.55 | 5.43 | 5 | 4.42 |
| 10 | 5.49 | 5.76 | 5.98 | 6.06 | 6.23 | 6.16 | 5.84 | 5.26 |
| 12 | 5.9 | 6.13 | 6.33 | 6.46 | 6.61 | 6.57 | 6.37 | 5.95 |
| 14 | 6.16 | 6.36 | 6.55 | 6.71 | 6.88 | 6.86 | 6.71 | 6.41 |
| 16 | 6.32 | 6.51 | 6.72 | 6.89 | 7.12 | 7.12 | 6.98 | 6.72 |
| 20 | 6.47 | 6.69 | 6.97 | 7.11 | 7.57 | 7.62 | 7.5 | 7.22 |
| 24 | 6.53 | 6.77 | 7.14 | 7.38 | 7.84 | 8.1 | 8.04 | 7.74 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 46.1° | 2.63 | 147.6° | 2.98 |
| 8 | 44.2° | 3.21 | 151.4° | 3.83 |
| 10 | 43.5° | 3.61 | 153.4° | 4.57 |
| 12 | 43.1° | 3.93 | 158.6° | 5.24 |
| 14 | 42.7° | 4.16 | 170.3° | 5.81 |
| 16 | 42.5° | 4.29 | 177.4° | 6.27 |
| 20 | 42.4° | 4.4 | 179° | 6.85 |
| 24 | 42.9° | 4.41 | 179° | 7.33 |
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