Antrim Ultimate 20
Description
The Ultimate 20, designed by Jim Antrim in 1994, is a 20‑foot fractional‑sloop sportboat built for one‑design and PHRF racing. With rig dimensions I ≈ 25.5 ft, J ≈ 7.8 ft, P ≈ 28 ft, E ≈ 10 ft and a lifting bulb keel, it carries about 240 sq ft of upwind sail area and 325 sq ft downwind. Easy to trailer, launch, and plane, the Antrim Ultimate 20 remains one of the most successful modern sport boats for small‑crew performance sailing.
Construction Details
| Designer | Jim Antrim |
|---|---|
| Builder | Ultimate Sailboats International |
| Length | 20.833 ft |
| LOA | 20.833 ft |
| LWL | 18.167 ft |
| Beam | 8.000 ft |
| Displacement | 1290 lb |
| Ballast | 450 lb |
| Max Draft | 4.917 ft |
| Min Draft | 1.000 ft |
| Year Built | 1994 |
The standard boat dimensions
| i | 24 ft |
|---|---|
| j | 7.75 ft |
| p | 26.50 ft |
| e | 10 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 24 ft | 7.75 ft | 26.50 ft | 10 ft | - | - | - | - |
Documents
Sails
Antrim Ultimate 20 - MAINSAIL
| Luff | * 26.5 ft - (8077 mm) |
|---|---|
| Foot | * 10 ft - (3048 mm) |
| Leech | * 27.74 ft - (8455 mm) |
| Tack Angle | * 88.03 ° |
| Diagonal | * 28 ft - (8534 mm) |
| Head (inches) | * 4.5 in - (114 mm) |
| Area | * 136.19 ft² |
| Edit in Calculator | |
Antrim Ultimate 20 - JIBSAIL
| Luff | 20.18 ft - (6151 mm) |
|---|---|
| Foot | * 10.28 ft - (3133 mm) |
| Leech | * 17.49 ft - (5331 mm) |
| Percentage LP | * 114.97 % |
| Length Perpendicular | * 8.91 ft - (2716 mm) |
| Deck Angle | * 12.03 ° |
| Area | * 89.89 ft² |
| Edit in Calculator | |
Antrim Ultimate 20 - GENOA
| Luff | 23.96 ft - (7303 mm) |
|---|---|
| Foot | * 12.52 ft - (3816 mm) |
| Leech | * 22.53 ft - (6867 mm) |
| Percentage LP | * 149.94 % |
| Length Perpendicular | * 11.62 ft - (3542 mm) |
| Deck Angle | * 3.95 ° |
| Area | * 139.22 ft² |
| Edit in Calculator | |
Antrim Ultimate 20 - ASYMMETRICAL
| Luff | 31.33 ft - (9549 mm) |
|---|---|
| Foot | 19.167 ft - (5842 mm) |
| Leech | 28.42 ft - (8662 mm) |
| Perc LP | * 165 % |
| Area | * 450 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.