Stompen - NOR470

Sailing performance analysis for a Ballad from 1974, built by Albin Marin AB and designed by Rolf Magnusson.

Compare with another boat

9.079

Length (LOA)

meters

2.942

Beam

meters

1.552

Draft

meters

3,299

Displacement

kilograms

Total Sail Area

square meters

Data provided by the Offshore Racing Congress (ORC) · Certificate issued 12/06/2025

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

2.04

2.09

6 kt

2.82

3.03

8 kt

3.44

3.90

10 kt

3.88

4.65

12 kt

4.15

5.31

14 kt

4.27

5.82

16 kt

4.33

6.20

20 kt

4.32

6.77

24 kt

4.23

7.28

⛵

Identity

NameStompen

Sail #NOR470

CountryNOR

BuilderAlbin Marin AB

DesignerRolf Magnusson

Build Year1,974

Series Year1,971

📏

Dimensions

LOA9.08m

Beam2.94m

Draft1.55m

Disp.3,299kg

WS16.87m²

Crew401kg

⛵

Sail Areas

Genoa31.63m²

Main16.98m²

Spinnaker62.43m²

Total48.6m²

🏆

ORC Rating

GPHN/A

CDL6.52

APH ToT0.9

APH ToD665

OSN0.83

Triple Offshore

Light

0.6931

Medium

0.9098

Heavy

1.013

Triple Inshore

Light

0.5416

Medium

0.7446

Heavy

0.8531

📈

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	2.04	2.82	3.44	3.88	4.15	4.27	4.33	4.32	4.23
52°	3.21	4.34	5.17	5.69	5.97	6.11	6.17	6.20	6.18
60°	3.41	4.58	5.39	5.87	6.12	6.27	6.34	6.39	6.41
75°	3.51	4.71	5.54	6.01	6.27	6.45	6.57	6.70	6.77
90°	3.41	4.60	5.47	6.04	6.32	6.51	6.69	6.93	7.10
110°	3.35	4.63	5.61	6.18	6.51	6.77	6.96	7.25	7.48
120°	3.19	4.46	5.48	6.12	6.49	6.79	7.06	7.56	7.92
135°	2.85	4.04	5.07	5.86	6.31	6.65	6.95	7.56	8.26
150°	2.42	3.50	4.50	5.35	5.98	6.36	6.67	7.24	7.88
Run VMG	2.09	3.03	3.90	4.65	5.31	5.82	6.20	6.77	7.28

Boat speed (knots) at wind angle / wind speed