BIG BROTHER
FRA PROTO 1/4 TON 1981Sail number FRA/IRL1984
GPH
763.9
OSN
740.5
LOA
7.02 m
Displacement
1089 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.543
Medium
0.7244
High
0.8251
Triple Offshore
Low
0.6927
Medium
0.8821
High
0.9918
Boat Specifications
Dimensions
- Length overall
- 7.02 m
- Beam
- 2.87 m
- Draft
- 1.48 m
- Displacement
- 1089 kg
- Crew weight
- 266 kg
- Wetted surface
- 11.46 m²
Sails
- Mainsail
- 15.37 m²
- Genoa
- 11.69 m²
- Spinnaker
- 32.18 m²
- Asymmetric spinnaker
- 0 m²
Design
- Type
- PROTO 1/4 TON 1981
- Designer
- Ron Holland
- Year built
- 1984
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 4.29 | 4.5 | 4.63 | 4.7 | 4.73 | 4.58 | 4.14 | 3.55 |
| 8 | 5.02 | 5.2 | 5.32 | 5.49 | 5.52 | 5.41 | 5.04 | 4.49 |
| 10 | 5.43 | 5.58 | 5.71 | 5.93 | 5.99 | 5.9 | 5.63 | 5.22 |
| 12 | 5.68 | 5.83 | 5.99 | 6.25 | 6.38 | 6.29 | 6.03 | 5.71 |
| 14 | 5.86 | 6.03 | 6.23 | 6.45 | 6.74 | 6.66 | 6.41 | 6.08 |
| 16 | 5.95 | 6.16 | 6.43 | 6.57 | 7.09 | 7.07 | 6.78 | 6.43 |
| 20 | 6 | 6.25 | 6.65 | 6.98 | 7.68 | 8.19 | 7.88 | 7.21 |
| 24 | 5.99 | 6.27 | 6.75 | 7.29 | 8.23 | 9.65 | 10.46 | 8.93 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 42.7° | 2.84 | 147.5° | 3.07 |
| 8 | 41° | 3.4 | 151.8° | 3.89 |
| 10 | 39.8° | 3.76 | 156.9° | 4.58 |
| 12 | 39.2° | 4 | 170° | 5.16 |
| 14 | 39° | 4.14 | 178.1° | 5.64 |
| 16 | 39.2° | 4.17 | 178.6° | 6 |
| 20 | 40.6° | 4.15 | 178.6° | 6.65 |
| 24 | 42.2° | 4.07 | 143.8° | 7.73 |
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