Cross 30 Trimaran
Description
The Cross 30 Trimaran is an obscure, plans-only American folding trimaran sailboat designed by multihull pioneer Norman Cross in the late 1970s to early 1980s (plans dated ~1980). As with other Cross designs, it's intended for home construction using plywood-epoxy stitch-and-glue methods, with very few units (estimated 3–5) ever built due to its niche appeal and the rise of more modern trimarans. It features folding amas (outriggers) that collapse alongside the main hull via stainless hinges, reducing beam from ~22 ft to ~8 ft for trailering.
Construction Details
| Designer | Norman Cross |
|---|---|
| Length | 30.000 ft |
| Beam | 14.000 ft |
| Max Draft | 2.900 ft |
The standard boat dimensions
| i | 37.50 ft |
|---|---|
| j | 10.42 ft |
| p | 32.50 ft |
| e | 14 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 37.50 ft | 10.42 ft | 32.50 ft | 14 ft | - | - | - | - |
Sails
Cross 30 Trimaran - MAINSAIL
| Luff | * 32.5 ft - (9906 mm) |
|---|---|
| Foot | * 14 ft - (4267 mm) |
| Leech | * 34.74 ft - (10589 mm) |
| Tack Angle | * 88.02 ° |
| Diagonal | * 34.94 ft - (10650 mm) |
| Head (inches) | * 6 in - (152 mm) |
| Area | 227.22 ft² |
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Cross 30 Trimaran - JIBSAIL
| Luff | * 31.14 ft - (9491 mm) |
|---|---|
| Foot | * 13.51 ft - (4118 mm) |
| Leech | * 27.63 ft - (8422 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 11.98 ft - (3652 mm) |
| Deck Angle | * 12 ° |
| Area | 186.55 ft² |
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Cross 30 Trimaran - GENOA
| Luff | * 36.97 ft - (11268 mm) |
|---|---|
| Foot | * 16.58 ft - (5054 mm) |
| Leech | * 35.1 ft - (10698 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 15.63 ft - (4764 mm) |
| Deck Angle | * 4 ° |
| Area | 288.86 ft² |
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Cross 30 Trimaran - SPINNAKER
| Stays | * 36.97 ft - (11268 mm) |
|---|---|
| MidGirth | * 18.76 ft - (5718 mm) |
| Foot | * 18.76 ft - (5718 mm) |
| Perc LP | * 180 % |
| Area | 589.52 ft² |
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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.