JACKKNIFE
GBR J-125Sail number GBR/GBR8859R
GPH
537.9
OSN
523
LOA
12.527 m
Displacement
4533 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.747
Medium
1.0144
High
1.1722
Triple Offshore
Low
0.9745
Medium
1.2576
High
1.4299
Boat Specifications
Dimensions
- Length overall
- 12.527 m
- Beam
- 3.21 m
- Draft
- 2.49 m
- Displacement
- 4533 kg
- Crew weight
- 680 kg
- Wetted surface
- 28.22 m²
Sails
- Mainsail
- 46.17 m²
- Genoa
- 33.57 m²
- Spinnaker
- 0 m²
- Asymmetric spinnaker
- 144.57 m²
Design
- Type
- J-125
- Builder
- TPI
- Designer
- JOHNSTONE
- Year built
- 1998
- Stability index
- 130.2
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 6.15 | 6.63 | 7.05 | 7.04 | 6.51 | 6.36 | 5.64 | 4.74 |
| 8 | 7.28 | 7.64 | 7.96 | 8 | 7.81 | 7.75 | 7.22 | 6.07 |
| 10 | 7.81 | 8.04 | 8.38 | 8.57 | 8.48 | 8.53 | 8.19 | 7.25 |
| 12 | 8.04 | 8.31 | 8.65 | 9.02 | 8.95 | 9.2 | 8.98 | 8.15 |
| 14 | 8.18 | 8.47 | 8.92 | 9.36 | 9.55 | 9.74 | 9.82 | 8.84 |
| 16 | 8.27 | 8.59 | 9.11 | 9.63 | 10.17 | 10.25 | 10.77 | 9.61 |
| 20 | 8.37 | 8.73 | 9.38 | 10.12 | 11.34 | 11.34 | 12.73 | 11.67 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 43° | 3.95 | 142.4° | 4.1 |
| 8 | 41.2° | 4.88 | 145.1° | 5.25 |
| 10 | 38.8° | 5.45 | 146.9° | 6.28 |
| 12 | 37.8° | 5.69 | 151.4° | 7.07 |
| 14 | 37.6° | 5.82 | 148.9° | 7.65 |
| 16 | 37.2° | 5.9 | 146.9° | 8.32 |
| 20 | 37.5° | 5.96 | 145.1° | 10.11 |
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