Swan 39 vs Swan 77
How do the Swan 39 and Swan 77 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Swan 39 | Swan 39 | Swan 77 | |
|---|---|---|
| Length overall | 31.5 ft9.60 m | 60.3 ft18.38 m |
| Waterline length | 31.5 ft9.60 m | 60.3 ft18.38 m |
| Beam | 12.5 ft3.81 m | 19.7 ft6.00 m |
| Draft | 7.2 ft2.19 m | 11.2 ft3.40 m |
| Displacement | 18,001 lb8,165 kg | 112,436 lb51,000 kg |
| Ballast | 7,900 lb3,583 kg | 39,683 lb18,000 kg |
| Sail area | 761 ft²70.7 m² | 2,811 ft²261.2 m² |
| SA / Displacement | 17.73 | 19.31 |
| Displacement / Length | 257 | 229 |
| Comfort ratio | 30.6 | 54.5 |
| Capsize screening | 1.91 | 1.63 |
| Hull speed (kn) | 7.5 | 10.4 |
Swan 39 vs Swan 77: the short version
- The Swan 77 is the larger boat at 60.3 ft18.38 m LOA versus 31.5 ft9.60 m for the Swan 39.
- The Swan 77 is heavier, displacing about 525% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Swan 77 carries the more powerful rig (19.3 vs 17.7), favouring lighter-air performance.
- The Swan 77 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Swan 77 rates better for offshore work (1.63 vs 1.91).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.