Cal 31
Description
The Cal 31 is an American cruiser-racer sailboat designed by C. Raymond Hunt Associates and built by Lear Siegler Marine (under the Cal Boats banner) from 1979 to 1983. It was introduced as a modern evolution of earlier Cal designs, targeting coastal cruising and club racing under PHRF (typical rating ~150-162). The boat combines performance, comfort, and seaworthiness for small families or couples, featuring a solid fiberglass hull, a fixed fin keel, and a spade rudder. Approximately 100-150 units were built, making it relatively rare compared to earlier models like the Cal 29 or Cal 2-30. It’s praised for its balanced handling, spacious interior, and quality construction but requires maintenance on aging systems like the Yanmar diesel engine, rigging, and balsa-cored deck. Used prices range from $15,000 to $30,000 depending on condition, with many boats upgraded with modern electronics or sails.
Construction Details
| Designer | C. Raymond Hunt Associates |
|---|---|
| Builder | Cal Yachts |
| Length | 31.000 ft |
| LOA | 31.500 ft |
| LWL | 25.670 ft |
| Beam | 10.000 ft |
| Displacement | 9170 lb |
| Ballast | 3600 lb |
| Max Draft | 5.000 ft |
| Year Built | 1979 |
The standard boat dimensions
| i | 41.50 ft |
|---|---|
| j | 13.42 ft |
| p | 35 ft |
| e | 12 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 41.50 ft | 13.42 ft | 35 ft | 12 ft | - | - | - | - |
Documents
Sails
Cal 31 - MAINSAIL
| Luff | * 35 ft - (10668 mm) |
|---|---|
| Foot | * 12 ft - (3658 mm) |
| Leech | * 36.48 ft - (11119 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 36.6 ft - (11156 mm) |
| Head (inches) | * 4.5 in - (114 mm) |
| Area | * 216.356 ft² |
| Edit in Calculator |
Cal 31 - JIBSAIL
| Luff | * 34.9 ft - (10638 mm) |
|---|---|
| Foot | * 17.81 ft - (5428 mm) |
| Leech | * 30.24 ft - (9217 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 15.43 ft - (4703 mm) |
| Deck Angle | * 12 ° |
| Area | * 269.27 ft² |
| Edit in Calculator |
Cal 31 - GENOA
| Luff | * 41.44 ft - (12631 mm) |
|---|---|
| Foot | * 21.7 ft - (6614 mm) |
| Leech | * 38.94 ft - (11869 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 20.13 ft - (6136 mm) |
| Deck Angle | * 4 ° |
| Area | * 417.07 ft² |
| Edit in Calculator |
Cal 31 - ASYMMETRICAL
| Luff | * 41.44 ft - (12631 mm) |
|---|---|
| Foot | * 22.14 ft - (6748 mm) |
| Leech | * 38.12 ft - (11619 mm) |
| Perc LP | * 165 % |
| Area | * 688.11 ft² |
| Edit in Calculator |
Cal 31 - STORMJIB
| Luff | * 23.99 ft - (7312 mm) |
|---|---|
| Foot | * 10.07 ft - (3069 mm) |
| Leech | * 19.66 ft - (5992 mm) |
| Perc LP | * 60 % |
| Length Perp | * 8.05 ft - (2454 mm) |
| Deck Angle | * 19 ° |
| Area | * 96.54 ft² |
| Edit in Calculator |
Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.
Comments
