So Long - NOR15704
Sailing performance analysis for a Dufour 412 GL from 2016, built by Dufour and designed by Felci.
Data provided by the Offshore Racing Congress (ORC)
A comfortable cruiser that prioritizes ease and stability. Reaches a pleasant 6.6 knots upwind in 10 knots of wind, making it ideal for leisurely sailing. The downwind sail is an asymmetric spinnaker, which complements its balanced sail plan, though the sail area is modest for its size. This boat is perfect for those who enjoy relaxed and steady cruising.
Sailing performance as a polar diagram
A polar diagram shows boat speed at different wind angles and wind speeds. The distance from center represents boat speed in knots, and the angle represents the boats angle to the wind. The wind speed is shown as true wind speed (TWS), not apparent wind speed. Likewise, the wind angle is shown as true wind angle (TWA), not apparent wind angle.
Beat: Sailing upwind (toward the wind)
Beam Reach: Sailing across the wind
Run: Sailing downwind (away from the wind)
VMG Performance
Wind Speed (columns): True wind speed (TWS) in knots - the actual wind speed, not the apparent wind you feel on deck.
VMG (Velocity Made Good) is your effective speed toward your destination, not your actual boat speed.
Beat VMG (top bars): Speed made good when sailing upwind. Higher is better - it means you're reaching the windward mark faster.
Run VMG (bottom bars): Speed made good when sailing downwind. Higher is better - it means you're reaching the leeward mark faster.
Identity
Dimensions
Sail Areas
ORC Rating
Rated boat speeds
| Wind Speed (TWS) | |||||||
|---|---|---|---|---|---|---|---|
| 6 kt | 8 kt | 10 kt | 12 kt | 14 kt | 16 kt | 20 kt | |
| Beat VMG | 3.13 | 3.83 | 4.37 | 4.84 | 5.18 | 5.31 | 5.33 |
| 52° | 4.91 | 5.87 | 6.64 | 7.22 | 7.55 | 7.71 | 7.77 |
| 60° | 5.26 | 6.23 | 6.99 | 7.47 | 7.76 | 7.93 | 8.04 |
| 75° | 5.53 | 6.53 | 7.26 | 7.66 | 7.93 | 8.16 | 8.49 |
| 90° | 5.61 | 6.77 | 7.56 | 7.97 | 8.22 | 8.36 | 8.72 |
| 110° | 5.66 | 6.87 | 7.63 | 8.05 | 8.44 | 8.83 | 9.41 |
| 120° | 5.48 | 6.66 | 7.50 | 7.96 | 8.34 | 8.76 | 9.62 |
| 135° | 4.92 | 6.06 | 7.03 | 7.65 | 8.05 | 8.42 | 9.23 |
| 150° | 4.16 | 5.25 | 6.17 | 6.96 | 7.47 | 7.81 | 8.37 |
| Run VMG | 3.60 | 4.55 | 5.34 | 6.02 | 6.47 | 7.00 | 7.85 |
Boat speed (knots) at wind angle / wind speed