J/105
Description
Designed by Rod Johnstone and introduced in 1991 by J/Boats in Newport, Rhode Island, the J/105 is a fractional sloop known for its blend of high-performance racing, daysailing ease, and modest cruising capability. Over 680 units have been built, with active fleets worldwide, making it one of the most successful one-design keelboats. It’s celebrated for its speed, responsiveness, and ability to sail well in varied conditions, used in competitive regattas and club racing (e.g., Key West Race Week). Owners love its sprit-launched asymmetrical spinnaker and lively handling but note the minimal interior limits overnighting.
Construction Details
| Designer | Rod Johnstone |
|---|---|
| Builder | J/Boats |
| Length | 34.500 ft |
| LOA | 34.500 ft |
| LWL | 29.500 ft |
| Beam | 11.000 ft |
| Displacement | 7750 lb |
| Ballast | 3400 lb |
| Max Draft | 6.500 ft |
| Year Built | 1995 |
The standard boat dimensions
| i | 40.60 ft |
|---|---|
| j | 13.50 ft |
| p | 41.50 ft |
| e | 14.60 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 40.60 ft | 13.50 ft | 41.50 ft | 14.60 ft | - | - | - | - |
Sails
J/105 - MAINSAIL
| Luff | * 41.5 ft - (12649 mm) |
|---|---|
| Foot | * 14.6 ft - (4450 mm) |
| Leech | * 43.23 ft - (13177 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 43.51 ft - (13262 mm) |
| Head (inches) | * 6 in - (152 mm) |
| Area | * 311.75 ft² |
| Edit in Calculator |
J/105 - JIBSAIL
| Luff | 39.83 ft - (12140 mm) |
|---|---|
| Foot | 14.58 ft - (4444 mm) |
| Leech | 37 ft - (11278 mm) |
| Percentage LP | * 100.3 % |
| Length Perpendicular | * 13.54 ft - (4127 mm) |
| Deck Angle | * 3.34 ° |
| Area | * 269.73 ft² |
| Edit in Calculator |
J/105 - JIBSAIL
| Luff | * 34.23 ft - (10433 mm) |
|---|---|
| Foot | * 17.99 ft - (5483 mm) |
| Leech | * 29.54 ft - (9004 mm) |
| Percentage LP | * 114.96 % |
| Length Perpendicular | * 15.52 ft - (4730 mm) |
| Deck Angle | * 11.98 ° |
| Area | * 265.64 ft² |
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J/105 - GENOA
| Luff | * 40.65 ft - (12390 mm) |
|---|---|
| Foot | * 21.9 ft - (6675 mm) |
| Leech | * 38.13 ft - (11622 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 20.25 ft - (6172 mm) |
| Deck Angle | * 4 ° |
| Area | * 411.57 ft² |
| Edit in Calculator |
J/105 - ASYMMETRICAL
| Luff | * 40.65 ft - (12390 mm) |
|---|---|
| Foot | * 22.28 ft - (6791 mm) |
| Leech | * 37.4 ft - (11400 mm) |
| Perc LP | * 165 % |
| Area | * 679.26 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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