Tabula Rasa — ORC Rating

GPH

659.8

OSN

645.1

LOA

8.5 m

Displacement

1502 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6368

Medium

0.8291

High

0.9236

Triple Offshore

Low

0.8183

Medium

1.0131

High

1.1263

Boat Specifications

Dimensions

Length overall: 8.5 m
Beam: 2.97 m
Draft: 1.39 m
Displacement: 1502 kg
Crew weight: 368 kg
Wetted surface: 12.74 m²

Sails

Mainsail: 24.25 m²
Genoa: 19.01 m²
Spinnaker: 40.13 m²
Asymmetric spinnaker: 0 m²

Design

Type: Banner 28 HR
Builder: Banner Både
Designer: Lars Ordrerup
Year built: 1979

Velocity Prediction

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into WX Navigator or compatible navigation software.

6,42,4.696258,52,5.31,60,5.61,75,5.81,90,5.77,110,5.5,120,5.31,135,4.77,145,4.22388,150,3.99
8,40.9,5.490482,52,6.04,60,6.2,75,6.33,90,6.36,110,6.33,120,6.21,135,5.79,150,5.0114
10,38.6,5.745211,52,6.32,60,6.5,75,6.69,90,6.75,110,6.85,120,6.72,135,6.38,150,5.86,154,5.696522
12,37.9,5.829544,52,6.45,60,6.68,75,7,90,7.14,110,7.35,120,7.25,135,6.85,150,6.41,172,5.836803
14,37.9,5.880235,52,6.51,60,6.78,75,7.19,90,7.47,110,7.81,120,7.77,135,7.34,150,6.86,180,6.32
16,38.2,5.891658,52,6.55,60,6.84,75,7.29,90,7.74,110,8.21,120,8.39,135,7.87,150,7.32,180,6.75
20,39.4,5.952893,52,6.62,60,6.93,75,7.38,90,8.01,110,8.96,120,9.84,135,9.57,150,8.4,180,7.62

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.31	5.61	5.81	5.77	5.5	5.31	4.77	3.99
8	6.04	6.2	6.33	6.36	6.33	6.21	5.79	5.01
10	6.32	6.5	6.69	6.75	6.85	6.72	6.38	5.86
12	6.45	6.68	7	7.14	7.35	7.25	6.85	6.41
14	6.51	6.78	7.19	7.47	7.81	7.77	7.34	6.86
16	6.55	6.84	7.29	7.74	8.21	8.39	7.87	7.32
20	6.62	6.93	7.38	8.01	8.96	9.84	9.57	8.4

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.49	145°	3.46
8	40.9°	4.15	150°	4.34
10	38.6°	4.49	154°	5.12
12	37.9°	4.6	172°	5.78
14	37.9°	4.64	180°	6.32
16	38.2°	4.63	180°	6.75
20	39.4°	4.6	180°	7.62

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