COCOMERO & CHAMPAGNE
ITA Viper 640Sail number ITA/ITA72V640
GPH
592.6
OSN
580.4
LOA
6.45 m
Displacement
340 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.7063
Medium
0.8853
High
1.0596
Triple Offshore
Low
0.8962
Medium
1.1243
High
1.3259
Boat Specifications
Dimensions
- Length overall
- 6.45 m
- Beam
- 2.34 m
- Draft
- 1.5 m
- Displacement
- 340 kg
- Crew weight
- 240 kg
- Wetted surface
- 7.55 m²
Sails
- Mainsail
- 15.44 m²
- Genoa
- 8.59 m²
- Spinnaker
- 0 m²
- Asymmetric spinnaker
- 38 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 | 5.6 | 5.79 | 5.94 | 5.94 | 6.03 | 5.92 | 5.53 | 4.7 |
| 8 | 6.18 | 6.52 | 6.94 | 6.89 | 7.15 | 7.21 | 6.53 | 5.78 |
| 10 | 6.42 | 6.83 | 7.54 | 8.1 | 7.98 | 8.24 | 7.94 | 6.62 |
| 12 | 6.53 | 6.99 | 7.85 | 8.69 | 8.75 | 9.08 | 9.5 | 7.93 |
| 14 | 6.75 | 7.23 | 8.07 | 9.1 | 9.98 | 10.02 | 10.65 | 9.51 |
| 16 | 6.91 | 7.5 | 8.53 | 9.39 | 10.87 | 10.98 | 11.75 | 11.36 |
| 20 | 7.03 | 7.7 | 8.95 | 10.24 | 11.81 | 12.94 | 13.81 | 14.62 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 42.4° | 3.75 | 143° | 4.07 |
| 8 | 37.9° | 4.33 | 151.5° | 4.98 |
| 10 | 36.8° | 4.46 | 145.5° | 5.73 |
| 12 | 36.9° | 4.49 | 141.5° | 6.87 |
| 14 | 36.8° | 4.59 | 140.8° | 8.23 |
| 16 | 37.3° | 4.63 | 144.5° | 9.84 |
| 20 | 38.2° | 4.63 | 149.8° | 12.66 |
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