Harris 33
Description
The Harris 33 (also known as the Harris Trimaran 33 or Harris Eclipse 33 in some variants) is a rare, custom or semi-custom trimaran designed by pioneering multihull naval architect Robert B. Harris (1922–2012), best known for Sparkman & Stephens work, Maclear & Harris partnership, Vancouver series monohulls, and early catamaran/trimaran innovations like the Tiger Cat. Built sporadically from the 1970s–1980s (e.g., 1974 Eclipse, 1978 Hartley Harris, 1983 custom one-off), these are typically owner-completed or small-yard composite (fiberglass/epoxy/foam) vessels optimized for single-handed circumnavigation—rugged, stable, and fast for their era with fixed amas (no folding). No production run—most are one-offs or demountable designs; total built likely under 20.
The standard boat dimensions
| i | 41.58 ft |
|---|---|
| j | 12.50 ft |
| p | 36 ft |
| e | 14.50 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 41.58 ft | 12.50 ft | 36 ft | 14.50 ft | - | - | - | - |
Blueprints
Sails
Harris 33 - MAINSAIL
| Luff | 36 ft - (10973 mm) |
|---|---|
| Foot | 14.5 ft - (4420 mm) |
| Leech | * 38.15 ft - (11628 mm) |
| Tack Angle | * 88.01 ° |
| Diagonal | * 38.34 ft - (11686 mm) |
| Head (inches) | * 6 in - (152 mm) |
| Area | 260.69 ft² |
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Harris 33 - JIBSAIL
| Luff | 38 ft - (11582 mm) |
|---|---|
| Foot | 13.33 ft - (4063 mm) |
| Leech | 34.75 ft - (10592 mm) |
| Length Perpendicular | 12.17 ft - (3709 mm) |
| Area | 231.14 ft² |
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Harris 33 - GENOA
| Luff | 40.5 ft - (12344 mm) |
|---|---|
| Foot | 20.67 ft - (6300 mm) |
| Leech | 39.67 ft - (12091 mm) |
| Length Perpendicular | 19.75 ft - (6020 mm) |
| Area | 399.95 ft² |
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Harris 33 - SPINNAKER
| Stays | * 41.25 ft - (12573 mm) |
|---|---|
| MidGirth | * 22.5 ft - (6858 mm) |
| Foot | * 22.5 ft - (6858 mm) |
| Perc LP | * 180 % |
| Area | 788.91 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.