COCOMERO & CHAMPAGNE
ITA Viper 640Sail number ITA/ITA72V640
GPH
612.5
OSN
596.8
LOA
6.467 m
Displacement
340 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.6759
Medium
0.8645
High
1.0164
Triple Offshore
Low
0.86
Medium
1.0948
High
1.2768
Boat Specifications
Dimensions
- Length overall
- 6.467 m
- Beam
- 2.42 m
- Draft
- 1.4 m
- Displacement
- 340 kg
- Crew weight
- 240 kg
- Wetted surface
- 7.42 m²
Sails
- Mainsail
- 15.87 m²
- Genoa
- 7.75 m²
- Spinnaker
- 0 m²
- Asymmetric spinnaker
- 37.71 m²
Design
- Type
- Viper 640
- Builder
- Rondar Raceboats
- Designer
- Brian Bennett
- Year built
- 1993
- Stability index
- 110.8
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 5.38 | 5.61 | 5.75 | 5.72 | 5.84 | 5.72 | 5.24 | 4.43 |
| 8 | 6.04 | 6.31 | 6.6 | 6.56 | 6.88 | 6.89 | 6.32 | 5.54 |
| 10 | 6.33 | 6.69 | 7.29 | 7.61 | 7.64 | 8 | 7.64 | 6.44 |
| 12 | 6.49 | 6.93 | 7.71 | 8.42 | 8.32 | 8.82 | 9.1 | 7.7 |
| 14 | 6.6 | 7.1 | 8.03 | 8.94 | 9.35 | 9.58 | 10.36 | 9.13 |
| 16 | 6.67 | 7.23 | 8.29 | 9.36 | 10.32 | 10.29 | 11.37 | 10.65 |
| 20 | 6.67 | 7.36 | 8.65 | 9.96 | 11.56 | 12.14 | 13.13 | 13.72 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 42° | 3.58 | 143.5° | 3.84 |
| 8 | 38.8° | 4.2 | 148.7° | 4.8 |
| 10 | 37.6° | 4.38 | 148.7° | 5.57 |
| 12 | 37.8° | 4.45 | 141.5° | 6.67 |
| 14 | 38.2° | 4.47 | 142.8° | 7.91 |
| 16 | 38.8° | 4.48 | 144.7° | 9.23 |
| 20 | 40.2° | 4.44 | 148.9° | 11.89 |
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