COCOMERO & CHAMPAGNE
ITA Viper 640Sail number ITA/ITA72V640
GPH
602.3
OSN
588.1
LOA
6.45 m
Displacement
340 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.6907
Medium
0.8766
High
1.0454
Triple Offshore
Low
0.8776
Medium
1.1095
High
1.3073
Boat Specifications
Dimensions
- Length overall
- 6.45 m
- Beam
- 2.42 m
- Draft
- 1.4 m
- Displacement
- 340 kg
- Crew weight
- 240 kg
- Wetted surface
- 7.22 m²
Sails
- Mainsail
- 15.44 m²
- Genoa
- 7.62 m²
- Spinnaker
- 0 m²
- Asymmetric spinnaker
- 38 m²
Design
- Type
- Viper 640
- Builder
- Rondar Raceboats
- Designer
- Brian Bennett
- Year built
- 1993
- Stability index
- 110.6
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 5.45 | 5.67 | 5.81 | 5.87 | 5.96 | 5.85 | 5.45 | 4.62 |
| 8 | 6.09 | 6.4 | 6.73 | 6.66 | 7.06 | 7.09 | 6.47 | 5.71 |
| 10 | 6.35 | 6.74 | 7.43 | 7.88 | 7.77 | 8.12 | 7.85 | 6.59 |
| 12 | 6.46 | 6.92 | 7.76 | 8.57 | 8.44 | 8.9 | 9.37 | 7.88 |
| 14 | 6.68 | 7.14 | 7.98 | 8.99 | 9.69 | 9.66 | 10.49 | 9.4 |
| 16 | 6.82 | 7.4 | 8.42 | 9.3 | 10.67 | 10.39 | 11.56 | 11.2 |
| 20 | 6.96 | 7.63 | 8.89 | 10.18 | 11.82 | 12.75 | 13.37 | 14.24 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 43.5° | 3.59 | 142.8° | 4 |
| 8 | 38.7° | 4.25 | 150.5° | 4.95 |
| 10 | 37.5° | 4.4 | 145.2° | 5.71 |
| 12 | 37.6° | 4.44 | 141.5° | 6.83 |
| 14 | 37.5° | 4.54 | 142° | 8.14 |
| 16 | 38.1° | 4.57 | 144.7° | 9.7 |
| 20 | 39.1° | 4.58 | 149.8° | 12.33 |
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