Cal 31 1981 And Earlier
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 |
|---|---|
| Length | 31.000 ft |
| LOA | 31.500 ft |
| LWL | 25.670 ft |
| Beam | 10.000 ft |
| Displacement | 9170 lb |
| Max Draft | 5.000 ft |
The standard boat dimensions
| i | 41.50 ft |
|---|---|
| j | 13.50 ft |
| p | 35 ft |
| e | 12 ft |
| p2 | - |
| e2 | - |
| I | J | P | E | P2 | E2 |
|---|---|---|---|---|---|
| 41.50 ft | 13.50 ft | 35 ft | 12 ft | - | - |
Sails
| Sail Type | MAINSAIL |
|---|---|
| 23 | * 35 |
| 10 | * 12 |
| 24.55 | * 36.25 |
| 88 | * 87.99 |
| 24.76 | * 36.6 |
| 4.5 | * 5.25 |
| 118.76 | * 214.65 |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 40.5 ft - (12344 mm) |
| Foot | 16.92 ft - (5157 mm) |
| Leech | 35.75 ft - (10897 mm) |
| Percentage LP | * 110.44 % |
| Length Perpendicular | * 14.91 ft - (4545 mm) |
| Deck Angle | * 10.22 ° |
| Area | * 301.85 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 34.91 ft - (10641 mm) |
| Foot | * 17.92 ft - (5462 mm) |
| Leech | * 30.24 ft - (9217 mm) |
| Percentage LP | * 114.96 % |
| Length Perpendicular | * 15.52 ft - (4730 mm) |
| Deck Angle | * 11.97 ° |
| Area | * 270.92 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 40.5 ft - (12344 mm) |
| Foot | 17.42 ft - (5310 mm) |
| Leech | 36.25 ft - (11049 mm) |
| Percentage LP | * 115.48 % |
| Length Perpendicular | * 15.59 ft - (4752 mm) |
| Deck Angle | * 8.48 ° |
| Area | * 315.69 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | 40.75 ft - (12421 mm) |
| Foot | 21.75 ft - (6629 mm) |
| Leech | 38.75 ft - (11811 mm) |
| Percentage LP | * 150.52 % |
| Length Perpendicular | * 20.32 ft - (6194 mm) |
| Deck Angle | * 2.87 ° |
| Area | * 414.03 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | 41.46 ft - (12637 mm) |
| Foot | * 21.84 ft - (6657 mm) |
| Leech | * 38.96 ft - (11875 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 20.25 ft - (6172 mm) |
| Deck Angle | * 3.97 ° |
| Area | * 419.81 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | 40.5 ft - (12344 mm) |
| Foot | 19.75 ft - (6020 mm) |
| Leech | 37.75 ft - (11506 mm) |
| Percentage LP | * 135.41 % |
| Length Perpendicular | * 18.28 ft - (5572 mm) |
| Deck Angle | * 4.21 ° |
| Area | * 370.21 ft² |
| Sail Type | DRIFTER |
|---|---|
| Luff | * 41.46 ft - (12637 mm) |
| Foot | * 22.73 ft - (6928 mm) |
| Leech | * 37.14 ft - (11320 mm) |
| Perc LP | * 150 % |
| Length Perp | * 20.25 ft - (6172 mm) |
| Deck Angle | * 9 ° |
| Area | * 419.77 ft² |
| Sail Type | ASYMMETRICAL |
|---|---|
| Luff | 43 ft - (13106 mm) |
| Foot | 23 ft - (7010 mm) |
| Leech | 40 ft - (12192 mm) |
| Perc LP | * 165 % |
| Area | * 742 ft² |
| Sail Type | SPINNAKER |
|---|---|
| Stays | * 41.46 ft - (12637 mm) |
| MidGirth | * 24.3 ft - (7407 mm) |
| Foot | * 24.3 ft - (7407 mm) |
| Perc LP | * 180 % |
| Area | * 856 ft² |
| Sail Type | STORMTRYSAIL |
|---|---|
| Luff | 14.5 ft - (4420 mm) |
| Foot | 9.75 ft - (2972 mm) |
| Leech | 19.58 ft - (5968 mm) |
| Length Perp | * 11.05 ft - (3368 mm) |
| Tack Angle | * 8.56 ° |
| Area | * 68 ft² |
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.