J/24
Description
The J/24 (1977–present) is the most successful one-design keelboat in history and the boat that put J/Boats on the map. At just 24′ LOA (20′ LWL), 1,790 lb displacement, and 840 lb of ballast in a fixed fin keel (4′ draft), it carries 260 sq ft of working sail on a simple fractional aluminum rig, delivering a lively SA/D of ~21 and a D/L around 135—fast, finger-light, and instantly responsive. With a huge open cockpit for five crew, a tiny two-berth cuddy below (and optional head), and a 3–6 hp outboard in a well, it is the ultimate “race on Wednesday, sail with friends on Saturday” machine. Trailerable behind almost any car, it planes off the wind in the teens with a symmetric chute and points surprisingly well upwind for its age. More than 5,500 hulls have been built across four decades (production continues today in the U.S. and under license), with active fleets in over 40 countries and a world championship that still draws 80–100 boats. Tough as nails, inexpensive to maintain, and still embarrassingly quick against much newer designs, the J/24 remains the gold standard for grassroots one-design racing and the boat that taught a generation how pure, addictive sailing feels.
Construction Details
| Designer | Rod Johnstone |
|---|---|
| Builder | J Boats |
| Length | 24.000 ft |
| LOA | 24.000 ft |
| LWL | 20.000 ft |
| Beam | 8.900 ft |
| Displacement | 3100 lb |
| Max Draft | 4.000 ft |
The standard boat dimensions
| i | 26.25 ft |
|---|---|
| j | 9.50 ft |
| p | 28 ft |
| e | 9.75 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 26.25 ft | 9.50 ft | 28 ft | 9.75 ft | - | - | - | - |
Documents
Sails
J/24 - MAINSAIL
| Luff | 28 ft - (8534 mm) |
|---|---|
| Foot | 9.75 ft - (2972 mm) |
| Leech | * 29.12 ft - (8876 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 29.33 ft - (8940 mm) |
| Head (inches) | * 4.5 in - (114 mm) |
| Area | * 140.96 ft² |
| Edit in Calculator | |
J/24 - JIBSAIL
| Luff | 26.58 ft - (8102 mm) |
|---|---|
| Foot | 10.33 ft - (3149 mm) |
| Leech | 24 ft - (7315 mm) |
| Percentage LP | * 98.11 % |
| Length Perpendicular | * 9.32 ft - (2841 mm) |
| Deck Angle | * 5.7 ° |
| Area | * 123.82 ft² |
| Edit in Calculator | |
J/24 - JIBSAIL
| Luff | 26 ft - (7925 mm) |
|---|---|
| Foot | 8.5 ft - (2591 mm) |
| Leech | 23.5 ft - (7163 mm) |
| Percentage LP | * 80.21 % |
| Length Perpendicular | * 7.62 ft - (2323 mm) |
| Deck Angle | * 6.43 ° |
| Area | * 99.04 ft² |
| Edit in Calculator | |
J/24 - GENOA
| Luff | 26.58 ft - (8102 mm) |
|---|---|
| Foot | 15.83 ft - (4825 mm) |
| Leech | 25 ft - (7620 mm) |
| Percentage LP | * 153.16 % |
| Length Perpendicular | * 14.55 ft - (4435 mm) |
| Deck Angle | * 3.35 ° |
| Area | * 193.31 ft² |
| Edit in Calculator | |
J/24 - GENOA
| Luff | * 26.52 ft - (8083 mm) |
|---|---|
| Foot | * 15.59 ft - (4752 mm) |
| Leech | * 24.72 ft - (7535 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 14.25 ft - (4343 mm) |
| Deck Angle | * 4.03 ° |
| Area | * 188.97 ft² |
| Edit in Calculator | |
J/24 - DRIFTER
| Luff | * 26.52 ft - (8083 mm) |
|---|---|
| Foot | * 16.28 ft - (4962 mm) |
| Leech | * 23.47 ft - (7154 mm) |
| Perc LP | * 150 % |
| Length Perp | * 14.25 ft - (4343 mm) |
| Deck Angle | * 9.02 ° |
| Area | * 188.96 ft² |
| Edit in Calculator | |
J/24 - ASYMMETRICAL
| Edit in Calculator | |
J/24 - ASYMMETRICAL
| Luff | * 26.52 ft - (8083 mm) |
|---|---|
| Foot | * 15.68 ft - (4779 mm) |
| Leech | * 24.4 ft - (7437 mm) |
| Perc LP | * 165 % |
| Area | * 312 ft² |
| Edit in Calculator | |
J/24 - SPINNAKER
| Stays | 26.67 ft - (8129 mm) |
|---|---|
| MidGirth | 17.1 ft - (5212 mm) |
| Foot | 17.17 ft - (5233 mm) |
| Perc LP | * 180 % |
| Area | * 389 ft² |
| Edit in Calculator | |
J/24 - STORMJIB
| Luff | * 15.35 ft - (4679 mm) |
|---|---|
| Foot | * 7.32 ft - (2231 mm) |
| Leech | * 12.17 ft - (3709 mm) |
| Perc LP | * 60 % |
| Length Perp | * 5.7 ft - (1737 mm) |
| Deck Angle | * 19 ° |
| Area | * 43.73 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.