UNDERWOOD
ESP DUFOUR 31Sail number ESP/ESP5122_C
GPH
786.2
OSN
757.6
LOA
9.32 m
Displacement
5098 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.5025
Medium
0.7009
High
0.8414
Triple Offshore
Low
0.6491
Medium
0.869
High
0.9969
Boat Specifications
Dimensions
- Length overall
- 9.32 m
- Beam
- 3.29 m
- Draft
- 1.82 m
- Displacement
- 5098 kg
- Crew weight
- 350 kg
- Wetted surface
- 21.25 m²
Sails
- Mainsail
- 18.55 m²
- Genoa
- 19.18 m²
- Spinnaker
- 57.4 m²
- Asymmetric spinnaker
- 0 m²
Design
- Type
- DUFOUR 31
- Builder
- TAYLOR
- Designer
- M. DUFOUR
- Year built
- 1975
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 3.81 | 4.04 | 4.2 | 4.5 | 4.59 | 4.45 | 4.03 | 3.46 |
| 8 | 4.64 | 4.87 | 5.04 | 5.43 | 5.55 | 5.42 | 5 | 4.44 |
| 10 | 5.21 | 5.45 | 5.65 | 6.03 | 6.14 | 6.07 | 5.76 | 5.23 |
| 12 | 5.63 | 5.84 | 6.03 | 6.33 | 6.46 | 6.42 | 6.23 | 5.86 |
| 14 | 5.92 | 6.09 | 6.26 | 6.51 | 6.69 | 6.67 | 6.52 | 6.26 |
| 16 | 6.1 | 6.26 | 6.42 | 6.6 | 6.9 | 6.9 | 6.77 | 6.53 |
| 20 | 6.26 | 6.44 | 6.66 | 6.75 | 7.23 | 7.38 | 7.28 | 6.99 |
| 24 | 6.25 | 6.47 | 6.79 | 6.99 | 7.44 | 7.8 | 7.87 | 7.52 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 44.7° | 2.46 | 146.9° | 3 |
| 8 | 43.1° | 3.06 | 150.9° | 3.84 |
| 10 | 42° | 3.47 | 154.6° | 4.56 |
| 12 | 41.5° | 3.79 | 159.9° | 5.18 |
| 14 | 40.7° | 4.06 | 173.6° | 5.73 |
| 16 | 40° | 4.25 | 178.1° | 6.14 |
| 20 | 39.6° | 4.39 | 179.4° | 6.66 |
| 24 | 40.6° | 4.31 | 179° | 7.1 |
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