Seagull 18
Description
The Seagull 18 represents Ian Proctor's masterful approach to small boat design, combining 18.5-foot LOA with versatile keel/centerboard configuration and 215 ft² of well-proportioned sail area. Built by Bell Woodworking starting in 1956, approximately 400 units were produced as both kits and completed boats. The plywood hard chine construction provides excellent stability and spray deflection, while the 1.42-3.75-foot draft range offers remarkable versatility. With a 24.39 sail area to displacement ratio and 5.57-knot hull speed, this design delivers genuine sailing performance in a seaworthy, affordable package that remains relevant for coastal cruising, day sailing, and club racing nearly seven decades after its introduction.
Construction Details
| Designer | Ian Proctor |
|---|---|
| Builder | Bell Woodworking |
| Length | 18.500 ft |
| LOA | 18.500 ft |
| LWL | 17.250 ft |
| Beam | 6.750 ft |
| Displacement | 1680 lb |
| Ballast | 350 lb |
| Max Draft | 3.750 ft |
| Min Draft | 1.420 ft |
| Year Built | 1956 |
The standard boat dimensions
| i | 24 ft |
|---|---|
| j | 6.50 ft |
| p | 22 ft |
| e | 9.50 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 24 ft | 6.50 ft | 22 ft | 9.50 ft | - | - | - | - |
Sails
Seagull 18 - MAINSAIL
| Luff | * 22 ft - (6706 mm) |
|---|---|
| Foot | * 9.5 ft - (2896 mm) |
| Leech | * 23.51 ft - (7166 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 23.66 ft - (7212 mm) |
| Head (inches) | * 4.5 in - (114 mm) |
| Area | * 108.499 ft² |
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Seagull 18 - JIBSAIL
| Luff | * 19.89 ft - (6062 mm) |
|---|---|
| Foot | * 8.4 ft - (2560 mm) |
| Leech | * 17.72 ft - (5401 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 7.48 ft - (2280 mm) |
| Deck Angle | * 12 ° |
| Area | * 74.37 ft² |
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Seagull 18 - GENOA
| Luff | * 23.62 ft - (7199 mm) |
|---|---|
| Foot | * 10.32 ft - (3146 mm) |
| Leech | * 22.46 ft - (6846 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 9.75 ft - (2972 mm) |
| Deck Angle | * 4 ° |
| Area | * 115.13 ft² |
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Seagull 18 - ASYMMETRICAL
| Luff | * 23.62 ft - (7199 mm) |
|---|---|
| Foot | * 10.73 ft - (3271 mm) |
| Leech | * 21.73 ft - (6623 mm) |
| Perc LP | * 165 % |
| Area | * 190.08 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.
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