Kerttu
EST FOLKBOATSail number EST/ESTF1
GPH
850.5
OSN
821
LOA
7.68 m
Displacement
2195 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.4688
Medium
0.6505
High
0.7589
Triple Offshore
Low
0.6052
Medium
0.8018
High
0.9064
Boat Specifications
Dimensions
- Length overall
- 7.68 m
- Beam
- 2.21 m
- Draft
- 1.21 m
- Displacement
- 2195 kg
- Crew weight
- 240 kg
- Wetted surface
- 15.21 m²
Sails
- Mainsail
- 18.43 m²
- Genoa
- 7.3 m²
- Spinnaker
- 24.3 m²
- Asymmetric spinnaker
- 0 m²
Design
- Type
- FOLKBOAT
- Builder
- SET
- Year built
- 1941
- Stability index
- 137.5
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 3.67 | 3.87 | 4.06 | 4.28 | 4.23 | 4.05 | 3.56 | 3.1 |
| 8 | 4.38 | 4.57 | 4.84 | 5.09 | 5.05 | 4.89 | 4.43 | 3.96 |
| 10 | 4.87 | 5.07 | 5.34 | 5.58 | 5.57 | 5.46 | 5.16 | 4.7 |
| 12 | 5.21 | 5.4 | 5.61 | 5.86 | 5.89 | 5.81 | 5.6 | 5.29 |
| 14 | 5.42 | 5.59 | 5.77 | 6.05 | 6.16 | 6.09 | 5.9 | 5.67 |
| 16 | 5.53 | 5.71 | 5.92 | 6.16 | 6.4 | 6.35 | 6.17 | 5.94 |
| 20 | 5.6 | 5.81 | 6.1 | 6.31 | 6.79 | 6.84 | 6.7 | 6.45 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 44.1° | 2.4 | 150.5° | 2.68 |
| 8 | 42° | 2.92 | 156.8° | 3.46 |
| 10 | 40.8° | 3.29 | 164° | 4.14 |
| 12 | 40.6° | 3.56 | 173.6° | 4.79 |
| 14 | 40.6° | 3.71 | 177.2° | 5.29 |
| 16 | 40.8° | 3.78 | 179° | 5.65 |
| 20 | 41.5° | 3.82 | 179° | 6.16 |
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