CS 27 vs CS 30
How do the CS 27 and CS 30 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
CS 27 
CS 30 | CS 27 | CS 30 | |
|---|---|---|
| Length overall | 27.0 ft8.23 m | 30.0 ft9.14 m |
| Waterline length | 23.9 ft7.29 m | 25.4 ft7.75 m |
| Beam | 9.3 ft2.84 m | 10.3 ft3.12 m |
| Draft | 5.2 ft1.58 m | 5.5 ft1.68 m |
| Displacement | 6,100 lb2,767 kg | 8,000 lb3,629 kg |
| Ballast | 2,400 lb1,089 kg | 3,440 lb1,560 kg |
| Sail area | 341 ft²31.7 m² | 462 ft²42.9 m² |
| SA / Displacement | 16.34 | 18.48 |
| Displacement / Length | 199 | 217 |
| Comfort ratio | 19.4 | 20.8 |
| Capsize screening | 2.04 | 2.05 |
| Hull speed (kn) | 6.6 | 6.8 |
CS 27 vs CS 30: the short version
- The CS 30 is the larger boat at 30.0 ft9.14 m LOA versus 27.0 ft8.23 m for the CS 27.
- The CS 30 is heavier, displacing about 31% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the CS 30 carries the more powerful rig (18.5 vs 16.3), favouring lighter-air performance.
- The CS 30 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the CS 27 rates better for offshore work (2.04 vs 2.05).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.