Back Bay
USA CAL 39-2 TM (1-147Sail number USA/USA8939
GPH
631.8
OSN
612.7
LOA
11.906 m
Displacement
8462 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.6522
Medium
0.8774
High
1.0049
Triple Offshore
Low
0.8342
Medium
1.0705
High
1.1873
Boat Specifications
Dimensions
- Length overall
- 11.906 m
- Beam
- 3.65 m
- Draft
- 2.06 m
- Displacement
- 8462 kg
- Crew weight
- 750 kg
- Wetted surface
- 33.44 m²
Sails
- Mainsail
- 37.17 m²
- Genoa
- 57.18 m²
- Spinnaker
- 124.34 m²
- Asymmetric spinnaker
- 124.75 m²
Design
- Type
- CAL 39-2 TM (1-147
- Builder
- JENSEN
- Designer
- LAPWORTH
- Year built
- 1978
- Stability index
- 123.3
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 5.31 | 5.57 | 5.72 | 5.59 | 5.54 | 5.38 | 4.88 | 4.14 |
| 8 | 6.22 | 6.44 | 6.57 | 6.5 | 6.63 | 6.5 | 6.01 | 5.25 |
| 10 | 6.76 | 6.93 | 7.05 | 7.08 | 7.24 | 7.17 | 6.85 | 6.18 |
| 12 | 7.03 | 7.19 | 7.33 | 7.37 | 7.6 | 7.57 | 7.34 | 6.9 |
| 14 | 7.15 | 7.33 | 7.53 | 7.59 | 7.89 | 7.91 | 7.71 | 7.35 |
| 16 | 7.23 | 7.41 | 7.67 | 7.79 | 8.13 | 8.22 | 8.05 | 7.69 |
| 20 | 7.29 | 7.49 | 7.81 | 8.09 | 8.43 | 8.76 | 8.72 | 8.33 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 43° | 3.5 | 145.1° | 3.58 |
| 8 | 41.2° | 4.21 | 149.8° | 4.55 |
| 10 | 39.6° | 4.7 | 152.3° | 5.37 |
| 12 | 38.8° | 4.96 | 157.7° | 6.07 |
| 14 | 38.2° | 5.09 | 168.2° | 6.65 |
| 16 | 37.8° | 5.16 | 177.2° | 7.14 |
| 20 | 37.6° | 5.22 | 179° | 7.81 |
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