Antrim 20 vs SB20
How do the Antrim 20 and SB20 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Antrim 20 | Antrim 20 | SB20 | |
|---|---|---|
| Length overall | 20.4 ft6.22 m | 20.3 ft6.20 m |
| Waterline length | 17.5 ft5.33 m | —— |
| Beam | 8.0 ft2.44 m | 6.9 ft2.10 m |
| Draft | 4.0 ft1.22 m | 4.9 ft1.50 m |
| Displacement | 1,850 lb839 kg | 1,510 lb685 kg |
| Ballast | 750 lb340 kg | 721 lb327 kg |
| Sail area | 226 ft²21.0 m² | 294 ft²27.3 m² |
| SA / Displacement | 23.99 | 35.74 |
| Displacement / Length | 154 | — |
| Comfort ratio | 9.7 | — |
| Capsize screening | 2.61 | 2.40 |
| Hull speed (kn) | 5.6 | — |
Antrim 20 vs SB20: the short version
- The Antrim 20 and SB20 are close in length (20.4 ft6.22 m vs 20.3 ft6.20 m ).
- The Antrim 20 is heavier, displacing about 23% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the SB20 carries the more powerful rig (35.7 vs 24.0), favouring lighter-air performance.
- By the capsize screening formula the SB20 rates better for offshore work (2.40 vs 2.61).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.