Welsford SEI
Description
The SEI (pronounced "say") is a double-ended lapstrake sailing/rowing boat designed by John Welsford, the New Zealand-based naval architect renowned for practical, heritage-inspired small craft (e.g., Pathfinder, Navigator, Walkabout) that blend traditional aesthetics with modern plywood/epoxy construction for amateur builders. Welsford drew inspiration from historic Norwegian Hardangerfjord faering boats (traditional clinker rowing/sailing craft) but modernized the SEI for lighter weight (about 50% lighter), slightly wider beam, better stability, and a focus on sailing first with rowing as a strong secondary mode—reversing the traditional faering emphasis. It's named after the sei (a baleen whale species), reflecting its graceful, purposeful lines.
Construction Details
| Designer | John Welsford |
|---|---|
| Builder | Home Built |
| Length | 15.000 ft |
| LOA | 15.000 ft |
The standard boat dimensions
| i | - |
|---|---|
| j | - |
| p | - |
| e | - |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - | - |
Sails
Welsford SEI - STANDING LUGSAIL
| Luff | 8.202 ft - (2500 mm) |
|---|---|
| Foot | 8.202 ft - (2500 mm) |
| Leech | 14.107 ft - (4300 mm) |
| Tack Angle | * 82.3 ° |
| Diag (clew/throat) | 10.794 ft - (3290 mm) |
| Head | 8.202 ft - (2500 mm) |
| Area | * 77.43 ft² |
| Edit in Calculator |
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.
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