Sheeba - NOR3950

Sailing performance analysis for a HR 312 from 1982, built by Hallberg Rassy and designed by Enderlein.

Compare with another boat

9.42

Length (LOA)

meters

3.09

Beam

meters

1.6

Draft

meters

5,018

Displacement

kilograms

Total Sail Area

square meters

Data provided by the Offshore Racing Congress (ORC) · Certificate issued 18/03/2025

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)

Wind Speed

4kt

6kt

8kt

10kt

12kt

14kt

16kt

20kt

24kt

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.

4 kt

2.05

2.17

6 kt

2.83

3.11

8 kt

3.43

3.94

10 kt

3.86

4.60

12 kt

4.16

5.13

14 kt

4.30

5.55

16 kt

4.37

5.90

20 kt

4.39

6.48

24 kt

4.32

6.92

⛵

Identity

NameSheeba

Sail #NOR3950

CountryNOR

BuilderHallberg Rassy

DesignerEnderlein

Build Year1,982

Series Year1,979

📏

Dimensions

LOA9.42m

Beam3.09m

Draft1.6m

Disp.5,018kg

WS22.78m²

Crew471kg

⛵

Sail Areas

Genoa30.64m²

Main21.82m²

Spinnaker0m²

A-Spin60.11m²

Total52.5m²

🏆

ORC Rating

GPHN/A

CDL6.83

APH ToT0.91

APH ToD662.3

OSN0.83

Triple Offshore

Light

0.7016

Medium

0.9126

Heavy

1.0162

Triple Inshore

Light

0.5462

Medium

0.7366

Heavy

0.8423

📈

Rated boat speeds

Wind angle (TWA)

	Wind Speed (TWS)
	4 kt	6 kt	8 kt	10 kt	12 kt	14 kt	16 kt	20 kt	24 kt
Beat VMG	2.05	2.83	3.43	3.86	4.16	4.30	4.37	4.39	4.32
52°	3.23	4.34	5.13	5.67	6.00	6.16	6.23	6.28	6.27
60°	3.42	4.56	5.35	5.86	6.16	6.33	6.40	6.46	6.47
75°	3.51	4.69	5.50	6.02	6.31	6.50	6.63	6.74	6.80
90°	3.44	4.71	5.66	6.23	6.52	6.68	6.78	6.97	7.11
110°	3.51	4.81	5.77	6.33	6.66	6.93	7.14	7.48	7.71
120°	3.39	4.65	5.62	6.24	6.60	6.90	7.17	7.66	8.11
135°	3.02	4.20	5.18	5.93	6.38	6.70	6.99	7.54	8.12
150°	2.51	3.59	4.54	5.31	5.91	6.31	6.59	7.07	7.55
Run VMG	2.17	3.11	3.94	4.60	5.13	5.55	5.90	6.48	6.92

Boat speed (knots) at wind angle / wind speed