Cal 28 Mk I
Description
The Cal 28 is an American cruiser-racer sailboat designed by William "Bill" Lapworth and built by Jensen Marine from 1963 to 1969. Part of the early Cal line, it was designed for coastal cruising with moderate racing capabilities under PHRF (typical rating ~180-192), offering a balance of performance, comfort, and affordability for small families or couples. The boat features a solid fiberglass hull, a fixed fin keel, and a spade rudder, making it responsive for day sailing, weekend trips, or short coastal voyages. Approximately 350-400 units were built, and its sturdy construction has kept it relevant in the used market.
The standard boat dimensions
| i | 33 ft |
|---|---|
| j | 11.67 ft |
| p | 28 ft |
| e | 11.67 ft |
| p2 | - |
| e2 | - |
| I | J | P | E | P2 | E2 |
|---|---|---|---|---|---|
| 33 ft | 11.67 ft | 28 ft | 11.67 ft | - | - |
Blueprints
Sails
| Sail Type | MAINSAIL |
|---|---|
| Luff | * 28 ft - (8534 mm) |
| Foot | * 11.67 ft - (3557 mm) |
| Leech | * 29.72 ft - (9059 mm) |
| Tack Angle | * 88.02 ° |
| Diagonal | * 29.96 ft - (9132 mm) |
| Head (inches) | * 5.25 in - (133 mm) |
| Area | * 168.74 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 33.25 ft - (10135 mm) |
| Foot | 15.5 ft - (4724 mm) |
| Leech | 30.75 ft - (9373 mm) |
| Percentage LP | * 122.37 % |
| Length Perpendicular | * 14.28 ft - (4353 mm) |
| Deck Angle | * 3.37 ° |
| Area | * 237.47 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 28 ft - (8534 mm) |
| Foot | * 15.74 ft - (4798 mm) |
| Leech | * 23.9 ft - (7285 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 13.42 ft - (4090 mm) |
| Deck Angle | * 12.02 ° |
| Area | * 187.89 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 28 ft - (8534 mm) |
| Foot | 9.75 ft - (2972 mm) |
| Leech | 25.42 ft - (7748 mm) |
| Percentage LP | * 75.58 % |
| Length Perpendicular | * 8.82 ft - (2688 mm) |
| Deck Angle | * 5.77 ° |
| Area | * 123.46 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | * 28 ft - (8534 mm) |
| Foot | 11.75 ft - (3581 mm) |
| Leech | 24.75 ft - (7544 mm) |
| Percentage LP | * 88.86 % |
| Length Perpendicular | * 10.37 ft - (3161 mm) |
| Deck Angle | * 8.58 ° |
| Area | * 145.17 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | 33.25 ft - (10135 mm) |
| Foot | * 19.08 ft - (5816 mm) |
| Leech | * 31.05 ft - (9464 mm) |
| Percentage LP | * 149.96 % |
| Length Perpendicular | * 17.5 ft - (5334 mm) |
| Deck Angle | * 4 ° |
| Area | * 290.94 ft² |
| Sail Type | DRIFTER |
|---|---|
| Luff | 33.25 ft - (10135 mm) |
| Foot | 21.75 ft - (6629 mm) |
| Leech | 31 ft - (9449 mm) |
| Perc LP | * 168.55 % |
| Length Perp | * 19.67 ft - (5995 mm) |
| Deck Angle | * 5.8 ° |
| Area | * 326.97 ft² |
| Sail Type | ASYMMETRICAL |
|---|---|
| Luff | * 33.25 ft - (10135 mm) |
| Foot | * 19.26 ft - (5870 mm) |
| Leech | * 30.59 ft - (9324 mm) |
| Perc LP | * 165 % |
| Area | * 480 ft² |
| Sail Type | SPINNAKER |
|---|---|
| Stays | * 33.25 ft - (10135 mm) |
| MidGirth | * 21.01 ft - (6404 mm) |
| Foot | * 21.01 ft - (6404 mm) |
| Perc LP | * 180 % |
| Area | * 594 ft² |
| Sail Type | STORMJIB |
|---|---|
| Luff | * 19.25 ft - (5867 mm) |
| Foot | * 8.94 ft - (2725 mm) |
| Leech | * 15.38 ft - (4688 mm) |
| Perc LP | * 59.98 % |
| Length Perp | * 7 ft - (2134 mm) |
| Deck Angle | * 18.96 ° |
| Area | * 67.41 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. 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.