SINNERMAN
USA Viper 640Sail number USA/USA143
GPH
605.6
OSN
590.7
LOA
6.467 m
Displacement
319 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.6868
Medium
0.8822
High
1.0385
Triple Offshore
Low
0.8725
Medium
1.1047
High
1.2877
Boat Specifications
Dimensions
- Length overall
- 6.467 m
- Beam
- 2.42 m
- Draft
- 1.4 m
- Displacement
- 319 kg
- Crew weight
- 159 kg
- Wetted surface
- 7.32 m²
Sails
- Mainsail
- 16.33 m²
- Genoa
- 7.97 m²
- Spinnaker
- 0 m²
- Asymmetric spinnaker
- 48.66 m²
Design
- Type
- Viper 640
- Builder
- Rondar Raceboats
- Designer
- Brian Bennett
- Year built
- 1996
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 5.47 | 5.69 | 5.85 | 5.77 | 5.93 | 5.86 | 5.36 | 4.54 |
| 8 | 6.03 | 6.32 | 6.69 | 6.71 | 6.74 | 6.96 | 6.53 | 5.64 |
| 10 | 6.3 | 6.66 | 7.25 | 7.69 | 7.41 | 7.79 | 7.99 | 6.75 |
| 12 | 6.48 | 6.91 | 7.66 | 8.35 | 8.36 | 8.57 | 9.22 | 8.21 |
| 14 | 6.62 | 7.1 | 8 | 8.87 | 9.48 | 9.3 | 10.16 | 9.66 |
| 16 | 6.72 | 7.26 | 8.28 | 9.29 | 10.27 | 10.13 | 11.06 | 11.19 |
| 20 | 6.79 | 7.42 | 8.66 | 9.91 | 11.41 | 12.05 | 12.77 | 14.07 |
| 24 | 6.63 | 7.32 | 8.75 | 10.32 | 12.31 | 13.12 | 14.27 | 16.04 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 42.1° | 3.66 | 143.3° | 3.93 |
| 8 | 38.6° | 4.19 | 149.2° | 4.89 |
| 10 | 37.9° | 4.36 | 139.6° | 5.85 |
| 12 | 37.9° | 4.44 | 143.5° | 7.11 |
| 14 | 38.2° | 4.49 | 145.8° | 8.36 |
| 16 | 38.6° | 4.52 | 147.9° | 9.69 |
| 20 | 39.7° | 4.5 | 152.1° | 12.33 |
| 24 | 41.4° | 4.34 | 154.9° | 14.75 |
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