Happy - NOR2425
Sailing performance analysis for a HAPPY 27 from 1986, built by Sandefjord modellv and designed by Petter Klyve.
Data provided by the Offshore Racing Congress (ORC)
A comfort cruiser that excels in stable and relaxed sailing, making it ideal for leisurely journeys. Reaches 5.4 knots upwind in 10 knots of wind, but downwind performance is modest at 4.8 knots in the same conditions, partly due to the absence of a spinnaker. Sail wardrobe includes a large genoa compared to the mainsail, which suits its balanced cruising design. The boat shines in heavier winds, coming alive as the breeze picks up.
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 | 2.69 | 3.25 | 3.67 | 4.05 | 4.35 | 4.48 | 4.48 |
| 52° | 4.16 | 4.97 | 5.58 | 5.96 | 6.20 | 6.34 | 6.39 |
| 60° | 4.42 | 5.25 | 5.83 | 6.14 | 6.35 | 6.51 | 6.60 |
| 75° | 4.60 | 5.45 | 6.01 | 6.29 | 6.50 | 6.70 | 7.00 |
| 90° | 4.53 | 5.39 | 6.00 | 6.32 | 6.58 | 6.85 | 7.33 |
| 110° | 4.17 | 5.07 | 5.80 | 6.23 | 6.50 | 6.76 | 7.32 |
| 120° | 3.88 | 4.79 | 5.55 | 6.08 | 6.39 | 6.65 | 7.21 |
| 135° | 3.40 | 4.33 | 5.08 | 5.74 | 6.17 | 6.44 | 6.96 |
| 150° | 2.96 | 3.85 | 4.61 | 5.28 | 5.86 | 6.23 | 6.73 |
| Run VMG | 2.58 | 3.39 | 4.13 | 4.77 | 5.37 | 5.89 | 6.47 |
Boat speed (knots) at wind angle / wind speed