Irwin 45 Ketch
Description
The Irwin 45 Ketch (built 1982–1985, ~40 hulls) was essentially a stretched, ketch-rigged version of the successful Irwin 43 center-cockpit platform, created for buyers who wanted even more interior volume and the heavy-weather flexibility of a mizzen without stepping all the way up to the massive Irwin 52. Key specifications: LOA 45′6″ (same sugar-scoop hull as the late Irwin 43), beam 13′6″, displacement ~29,000–30,000 lbs, ballast ~11,000 lbs in a shoal Scheel keel (standard draft 4′11″) or optional deeper fin. The conservative ketch rig (main + mizzen, total sail area ~950 sq ft, SA/D ≈14.5–15) is easy to shorten down and keeps the boat beautifully balanced when the breeze pipes up.
The standard boat dimensions
| i | 51.16 ft |
|---|---|
| j | 17.75 ft |
| p | 44 ft |
| e | 15.50 ft |
| p2 | 24 ft |
| e2 | 9.16 ft |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 51.16 ft | 17.75 ft | 44 ft | 15.50 ft | 24 ft | 9.16 ft | - | - |
Sails
Irwin 45 Ketch - MAINSAIL
| Luff | * 44 ft - (13411 mm) |
|---|---|
| Foot | * 15.5 ft - (4724 mm) |
| Leech | * 45.96 ft - (14009 mm) |
| Tack Angle | * 87.97 ° |
| Diagonal | * 46.13 ft - (14060 mm) |
| Head (inches) | * 6 in - (152 mm) |
| Area | 340.63 ft² |
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Irwin 45 Ketch - JIBSAIL
| Luff | * 43.32 ft - (13204 mm) |
|---|---|
| Foot | * 23.85 ft - (7269 mm) |
| Leech | * 37.11 ft - (11311 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 20.41 ft - (6221 mm) |
| Deck Angle | * 12 ° |
| Area | 442.2 ft² |
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Irwin 45 Ketch - GENOA
| Luff | * 51.44 ft - (15679 mm) |
|---|---|
| Foot | * 28.95 ft - (8824 mm) |
| Leech | * 48.1 ft - (14661 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 26.63 ft - (8117 mm) |
| Deck Angle | * 4 ° |
| Area | 684.68 ft² |
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Irwin 45 Ketch - MIZZEN
| Luff | * 24 ft - (7315 mm) |
|---|---|
| Foot | * 9.16 ft - (2792 mm) |
| Leech-AftHdBd | * 25.27 ft - (7702 mm) |
| Tack Ang | * 88.01 ° |
| Diag (clew/head) | * 25.39 ft - (7739 mm) |
| Head (inches) | * 4 in - (102 mm) |
| Area (no Roach) | 109.79 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.