Blackwatch
USA CustomSail number USA/USA71
GPH
536.8
OSN
524.3
LOA
20.684 m
Displacement
33167 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.749
Medium
1.0012
High
1.1752
Triple Offshore
Low
0.9728
Medium
1.2614
High
1.4213
Boat Specifications
Dimensions
- Length overall
- 20.684 m
- Beam
- 4.43 m
- Draft
- 2.82 m
- Displacement
- 33167 kg
- Crew weight
- 1330 kg
- Wetted surface
- 74.97 m²
Sails
- Mainsail
- 108.11 m²
- Genoa
- 151.01 m²
- Spinnaker
- 300.25 m²
- Asymmetric spinnaker
- 301.31 m²
Design
- Type
- Custom
- Builder
- Nevins
- Designer
- S&S
- Year built
- 1938
- Stability index
- 162.4
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 6.08 | 6.46 | 6.79 | 6.79 | 6.52 | 6.41 | 5.85 | 4.98 |
| 8 | 7.16 | 7.61 | 7.99 | 7.98 | 7.94 | 7.8 | 7.16 | 6.13 |
| 10 | 7.98 | 8.41 | 8.69 | 8.78 | 8.85 | 8.77 | 8.31 | 7.24 |
| 12 | 8.42 | 8.78 | 9.04 | 9.18 | 9.28 | 9.26 | 8.98 | 8.22 |
| 14 | 8.67 | 8.99 | 9.29 | 9.46 | 9.49 | 9.62 | 9.38 | 8.86 |
| 16 | 8.82 | 9.13 | 9.46 | 9.7 | 9.66 | 9.88 | 9.74 | 9.25 |
| 20 | 9 | 9.28 | 9.64 | 10.02 | 10.03 | 10.26 | 10.49 | 9.92 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 45.6° | 3.91 | 143.9° | 4.31 |
| 8 | 43.6° | 4.67 | 146.9° | 5.31 |
| 10 | 43.6° | 5.18 | 144.8° | 6.27 |
| 12 | 43.6° | 5.56 | 150.2° | 7.12 |
| 14 | 42.4° | 5.82 | 155.9° | 7.78 |
| 16 | 42° | 6 | 162.8° | 8.32 |
| 20 | 40.2° | 6.24 | 177.2° | 9.16 |
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