COCOMERO & CHAMPAGNE
ITA Viper 640Sail number ITA/ITA72V640
GPH
612.3
OSN
595.8
LOA
6.467 m
Displacement
340 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.6745
Medium
0.8667
High
1.0303
Triple Offshore
Low
0.8575
Medium
1.0949
High
1.2897
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
- 7.48 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
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 5.36 | 5.59 | 5.73 | 5.71 | 5.82 | 5.7 | 5.22 | 4.42 |
| 8 | 6.03 | 6.29 | 6.56 | 6.52 | 6.85 | 6.85 | 6.29 | 5.53 |
| 10 | 6.33 | 6.68 | 7.25 | 7.55 | 7.6 | 7.96 | 7.58 | 6.4 |
| 12 | 6.53 | 6.95 | 7.69 | 8.35 | 8.28 | 8.77 | 9.03 | 7.64 |
| 14 | 6.68 | 7.16 | 8.05 | 8.9 | 9.24 | 9.52 | 10.3 | 9.05 |
| 16 | 6.79 | 7.33 | 8.34 | 9.35 | 10.23 | 10.23 | 11.31 | 10.56 |
| 20 | 6.9 | 7.54 | 8.77 | 10.01 | 11.51 | 12.04 | 13.07 | 13.64 |
| 24 | 6.78 | 7.48 | 8.92 | 10.47 | 12.45 | 13.26 | 14.65 | 16.24 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 42.1° | 3.57 | 143.4° | 3.83 |
| 8 | 38.6° | 4.2 | 148.9° | 4.79 |
| 10 | 37.5° | 4.4 | 148.7° | 5.55 |
| 12 | 37.5° | 4.49 | 141.6° | 6.61 |
| 14 | 37.8° | 4.54 | 142.7° | 7.83 |
| 16 | 38.3° | 4.57 | 144.4° | 9.15 |
| 20 | 39.2° | 4.58 | 148.7° | 11.81 |
| 24 | 40.8° | 4.45 | 152.3° | 14.27 |
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