CS 30 vs CS 40
How do the CS 30 and CS 40 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
CS 30 
CS 40 | CS 30 | CS 40 | |
|---|---|---|
| Length overall | 30.0 ft9.14 m | 39.3 ft11.96 m |
| Waterline length | 25.4 ft7.75 m | 32.7 ft9.96 m |
| Beam | 10.3 ft3.12 m | 12.7 ft3.86 m |
| Draft | 5.5 ft1.68 m | 6.6 ft2.01 m |
| Displacement | 8,000 lb3,629 kg | 17,000 lb7,711 kg |
| Ballast | 3,440 lb1,560 kg | 7,500 lb3,402 kg |
| Sail area | 462 ft²42.9 m² | 767 ft²71.3 m² |
| SA / Displacement | 18.48 | 18.56 |
| Displacement / Length | 217 | 218 |
| Comfort ratio | 20.8 | 25.8 |
| Capsize screening | 2.05 | 1.97 |
| Hull speed (kn) | 6.8 | 7.7 |
CS 30 vs CS 40: the short version
- The CS 40 is the larger boat at 39.3 ft11.96 m LOA versus 30.0 ft9.14 m for the CS 30.
- The CS 40 is heavier, displacing about 113% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the CS 40 carries the more powerful rig (18.6 vs 18.5), favouring lighter-air performance.
- The CS 40 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the CS 40 rates better for offshore work (1.97 vs 2.05).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.