Shiraz - NOR4352

Sailing performance analysis for a CUMULUS from 1982, built by Albin Marin AB and designed by Peter Norlin.

Compare with another boat

8.63

Length (LOA)

meters

2.856

Beam

meters

1.739

Draft

meters

3,596

Displacement

kilograms

Total Sail Area

square meters

Data provided by the Offshore Racing Congress (ORC)

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

2.24

2.16

6 kt

3.05

3.11

8 kt

3.66

3.97

10 kt

4.04

4.71

12 kt

4.22

5.36

14 kt

4.28

5.85

16 kt

4.31

6.21

20 kt

4.30

6.74

24 kt

4.20

7.23

⛵

Identity

NameShiraz

Sail #NOR4352

CountryNOR

BuilderAlbin Marin AB

DesignerPeter Norlin

Build Year1,982

Series Year1,982

📏

Dimensions

LOA8.63m

Beam2.86m

Draft1.74m

Disp.3,596kg

WS17.52m²

Crew432kg

⛵

Sail Areas

Genoa26.34m²

Main20.38m²

Spinnaker52.52m²

Total46.7m²

🏆

ORC Rating

GPHN/A

CDL6.69

APH ToT0.91

APH ToD657.2

OSN0.84

Triple Offshore

Light

0.7235

Medium

0.9206

Heavy

1.0061

Triple Inshore

Light

0.5676

Medium

0.7587

Heavy

0.8516

📈

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	2.24	3.05	3.66	4.04	4.22	4.28	4.31	4.30	4.20
52°	3.45	4.60	5.37	5.79	5.98	6.05	6.09	6.12	6.09
60°	3.64	4.82	5.56	5.94	6.13	6.22	6.26	6.31	6.30
75°	3.74	4.94	5.69	6.07	6.29	6.43	6.51	6.60	6.64
90°	3.61	4.83	5.67	6.13	6.34	6.51	6.67	6.85	6.95
110°	3.53	4.81	5.74	6.21	6.51	6.75	6.93	7.15	7.27
120°	3.37	4.64	5.59	6.14	6.47	6.74	7.00	7.41	7.65
135°	3.00	4.18	5.15	5.88	6.29	6.59	6.87	7.42	8.01
150°	2.50	3.59	4.58	5.40	5.98	6.33	6.62	7.15	7.72
Run VMG	2.16	3.11	3.97	4.71	5.36	5.85	6.21	6.74	7.23

Boat speed (knots) at wind angle / wind speed