Jam Session
NED J-109Sail number NED/GBR6909R
GPH
615.8
OSN
599
LOA
10.75 m
Displacement
5109 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.751
Medium
1.0033
High
1.1337
Triple Offshore
Low
0.9663
Medium
1.2338
High
1.3674
Boat Specifications
Dimensions
- Length overall
- 10.75 m
- Beam
- 3.52 m
- Draft
- 2.13 m
- Displacement
- 5109 kg
- Crew weight
- 420 kg
- Wetted surface
- 26.37 m²
Sails
- Mainsail
- 39.26 m²
- Genoa
- 35.46 m²
- Spinnaker
- 0 m²
- Asymmetric spinnaker
- 96.47 m²
Design
- Type
- J-109
- Builder
- J Boats
- Designer
- Johnstone
- Year built
- 2001
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 5.34 | 5.63 | 5.87 | 5.82 | 5.83 | 5.68 | 5.12 | 4.34 |
| 8 | 6.33 | 6.59 | 6.78 | 6.85 | 6.94 | 6.81 | 6.3 | 5.44 |
| 10 | 6.92 | 7.09 | 7.22 | 7.34 | 7.46 | 7.38 | 7.09 | 6.39 |
| 12 | 7.17 | 7.33 | 7.5 | 7.56 | 7.87 | 7.82 | 7.53 | 7.02 |
| 14 | 7.28 | 7.48 | 7.72 | 7.82 | 8.26 | 8.29 | 7.97 | 7.38 |
| 16 | 7.34 | 7.55 | 7.91 | 8.11 | 8.51 | 8.76 | 8.46 | 7.67 |
| 20 | 7.36 | 7.6 | 8.08 | 8.56 | 8.95 | 9.45 | 9.56 | 8.43 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 42.5° | 3.51 | 144.4° | 3.76 |
| 8 | 41.1° | 4.24 | 148° | 4.71 |
| 10 | 40.1° | 4.8 | 148.8° | 5.54 |
| 12 | 38.5° | 5.1 | 150.3° | 6.08 |
| 14 | 38.1° | 5.22 | 174.2° | 6.45 |
| 16 | 37.9° | 5.28 | 177° | 7.01 |
| 20 | 38° | 5.29 | 177.9° | 7.7 |
Loading polar chart…