SMILIN' BOB
USA Viper 640Sail number USA/USA218
GPH
610.8
OSN
596.9
LOA
6.467 m
Displacement
319 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.6812
Medium
0.8665
High
1.0134
Triple Offshore
Low
0.8675
Medium
1.0956
High
1.2687
Boat Specifications
Dimensions
- Length overall
- 6.467 m
- Beam
- 2.42 m
- Draft
- 1.4 m
- Displacement
- 319 kg
- Crew weight
- 270 kg
- Wetted surface
- 7.26 m²
Sails
- Mainsail
- 15.9 m²
- Genoa
- 7.86 m²
- Spinnaker
- 0 m²
- Asymmetric spinnaker
- 39.86 m²
Design
- Type
- Viper 640
- Builder
- Rondar Raceboats
- Designer
- Brian Bennett
- Year built
- 1996
- Stability index
- 110.7
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 5.45 | 5.68 | 5.83 | 5.75 | 5.9 | 5.79 | 5.3 | 4.48 |
| 8 | 6.03 | 6.33 | 6.69 | 6.7 | 6.86 | 6.97 | 6.43 | 5.6 |
| 10 | 6.28 | 6.66 | 7.27 | 7.72 | 7.57 | 7.95 | 7.84 | 6.56 |
| 12 | 6.43 | 6.87 | 7.67 | 8.4 | 8.35 | 8.74 | 9.23 | 7.95 |
| 14 | 6.53 | 7.03 | 7.96 | 8.9 | 9.52 | 9.49 | 10.32 | 9.4 |
| 16 | 6.59 | 7.14 | 8.22 | 9.28 | 10.33 | 10.18 | 11.26 | 10.92 |
| 20 | 6.6 | 7.15 | 8.51 | 9.82 | 11.41 | 12.1 | 12.98 | 13.93 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 42° | 3.63 | 143.3° | 3.88 |
| 8 | 38.8° | 4.17 | 148.8° | 4.85 |
| 10 | 38.2° | 4.33 | 140.6° | 5.68 |
| 12 | 38.4° | 4.39 | 141.9° | 6.89 |
| 14 | 38.8° | 4.4 | 144.1° | 8.14 |
| 16 | 39.4° | 4.41 | 146° | 9.46 |
| 20 | 40.5° | 4.38 | 150.3° | 12.07 |
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