Sheeba - NOR3950
Sailing performance analysis for a HR 312 from 1982, built by Hallberg Rassy and designed by Enderlein.
Data provided by the Offshore Racing Congress (ORC) · Certificate issued 09/03/2026
This boat is a solid motorsailer, emphasizing comfort and capability over raw speed. It achieves a respectable 5.1 knots upwind in 10 knots of wind, though it's not designed to excel in this area. Downwind performance is modest with 4.6 knots in the same wind, due in part to its moderate-sized asymmetric spinnaker. The boat carries a large genoa relative to the mainsail, providing good power in varied conditions.
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
🏁 Race Results 🥈1 🥉2
| Date | Event | Result | Class | Skipper |
|---|---|---|---|---|
| 2026 | ||||
| 16.05.2026 | Stord Shorthanded 2026 | 3/4🥉 | Singlehanded | AUDUN NORDHUS |
| 2025 | ||||
| 11.10.2025 | Engelsen Anlegg Windjammer 2025 | 5/6 | NOR Rating APH Shorthanded | AUDUN NORDHUS |
| 31.05.2025 | Stord Shorthanded 2025 | 2/4🥈 | Singelhanded | AUDUN NORDHUS |
| 04.05.2025 | GNUEN 2025 | 3/5🥉 | Med Spinnaker | AUDUN NORDHUS |
| 2024 | ||||
| 05.10.2024 | Windjammer 2024 | 5/5 | Shorthanded | AUDUN NORDHUS |
Race results from manage2sail.com & sailracesystem.no
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 | 1.96 | 2.80 | 3.41 | 3.84 | 4.14 | 4.29 | 4.36 | 4.38 | 4.32 |
| 52° | 3.09 | 4.31 | 5.11 | 5.66 | 5.99 | 6.16 | 6.23 | 6.28 | 6.27 |
| 60° | 3.34 | 4.55 | 5.34 | 5.86 | 6.16 | 6.33 | 6.41 | 6.47 | 6.48 |
| 75° | 3.49 | 4.68 | 5.50 | 6.01 | 6.31 | 6.50 | 6.63 | 6.76 | 6.82 |
| 90° | 3.38 | 4.71 | 5.66 | 6.23 | 6.53 | 6.69 | 6.80 | 7.00 | 7.20 |
| 110° | 3.46 | 4.81 | 5.77 | 6.33 | 6.66 | 6.93 | 7.18 | 7.58 | 7.77 |
| 120° | 3.33 | 4.65 | 5.62 | 6.24 | 6.60 | 6.90 | 7.19 | 7.73 | 8.07 |
| 135° | 2.92 | 4.20 | 5.18 | 5.92 | 6.39 | 6.70 | 6.99 | 7.60 | 8.10 |
| 150° | 2.43 | 3.59 | 4.54 | 5.31 | 5.91 | 6.32 | 6.59 | 7.08 | 7.60 |
| Run VMG | 2.11 | 3.11 | 3.93 | 4.60 | 5.13 | 5.55 | 5.90 | 6.48 | 6.92 |
Boat speed (knots) at wind angle / wind speed