Bellini - NOR11722
Sailing performance analysis for a DEHLER 34 DD from 2006, built by Dehler Segelyachten GmbH and designed by Dehler Design.
Data provided by the Offshore Racing Congress (ORC) · Certificate issued 28/04/2026
This versatile cruiser-racer achieves a solid 5.9 knots upwind in 10 knots of wind. With a balanced sail plan and an asymmetric spinnaker, it handles well across a range of conditions. Its top speed is 9.4 knots in 20 knots of wind, showcasing its capability to perform even in stronger breezes. The jib and mainsail are well proportioned, ensuring effective performance on all points of sail.
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.
Measured sails
Measurements
Identity
Dimensions
Sail Areas
ORC Rating
Rated boat speeds
| Wind Speed (TWS) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4 kt | 6 kt | 8 kt | 10 kt | 12 kt | 14 kt | 16 kt | 20 kt | 24 kt | |
| Beat VMG | 2.30 | 3.30 | 4.01 | 4.46 | 4.67 | 4.76 | 4.80 | 4.80 | 4.64 |
| 52° | 3.63 | 5.03 | 5.97 | 6.54 | 6.80 | 6.91 | 6.96 | 7.01 | 6.89 |
| 60° | 3.91 | 5.31 | 6.23 | 6.77 | 7.03 | 7.14 | 7.21 | 7.26 | 7.22 |
| 75° | 4.11 | 5.51 | 6.42 | 6.96 | 7.25 | 7.43 | 7.54 | 7.67 | 7.71 |
| 90° | 4.00 | 5.55 | 6.58 | 7.09 | 7.31 | 7.56 | 7.78 | 8.07 | 8.22 |
| 110° | 4.08 | 5.68 | 6.78 | 7.34 | 7.73 | 8.00 | 8.21 | 8.57 | 8.78 |
| 120° | 3.95 | 5.55 | 6.67 | 7.29 | 7.72 | 8.12 | 8.50 | 9.03 | 9.52 |
| 135° | 3.46 | 4.98 | 6.15 | 6.96 | 7.45 | 7.89 | 8.34 | 9.41 | 10.99 |
| 150° | 2.86 | 4.19 | 5.31 | 6.25 | 6.94 | 7.37 | 7.75 | 8.54 | 9.68 |
| Run VMG | 2.48 | 3.63 | 4.60 | 5.41 | 6.02 | 6.47 | 6.86 | 7.52 | 8.38 |
Boat speed (knots) at wind angle / wind speed