Cal T/4, 1/4 Ton
Description
The Cal T/4 is a trailerable sailboat designed by C. William Lapworth as an International Offshore Rule (IOR) Quarter Ton class racer. Built by Jensen Marine/Cal Yachts in the United States from 1971 to 1972, it was intended for competitive racing while remaining portable. A total of 238 units were produced before it was discontinued, and it remains a notable design from the early 1970s.
The standard boat dimensions
| i | 30 ft |
|---|---|
| j | 10 ft |
| p | 23.60 ft |
| e | 9 ft |
| p2 | - |
| e2 | - |
| I | J | P | E | P2 | E2 |
|---|---|---|---|---|---|
| 30 ft | 10 ft | 23.60 ft | 9 ft | - | - |
Blueprints
Sails
| Sail Type | MAINSAIL |
|---|---|
| Luff | * 23.6 ft - (7193 mm) |
| Foot | * 9 ft - (2743 mm) |
| Leech | * 24.77 ft - (7550 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 24.96 ft - (7608 mm) |
| Head (inches) | * 4 in - (102 mm) |
| Area | * 109.53 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | * 25.3 ft - (7711 mm) |
| Foot | * 13.34 ft - (4066 mm) |
| Leech | * 21.82 ft - (6651 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 11.5 ft - (3505 mm) |
| Deck Angle | * 12 ° |
| Area | * 145.5 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | * 30.04 ft - (9156 mm) |
| Foot | * 16.23 ft - (4947 mm) |
| Leech | * 28.17 ft - (8586 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 15 ft - (4572 mm) |
| Deck Angle | * 4.01 ° |
| Area | * 225.31 ft² |
| Sail Type | ASYMMETRICAL |
|---|---|
| Luff | * 30.04 ft - (9156 mm) |
| Foot | * 16.5 ft - (5029 mm) |
| Leech | * 27.64 ft - (8425 mm) |
| Perc LP | * 165 % |
| Area | * 372 ft² |
| Sail Type | SPINNAKER |
|---|---|
| Stays | * 30.04 ft - (9156 mm) |
| MidGirth | * 18 ft - (5486 mm) |
| Foot | * 18 ft - (5486 mm) |
| Perc LP | * 180 % |
| Area | * 460 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.