Cygnus 20 vs Invader 36
How do the Cygnus 20 and Invader 36 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Cygnus 20 
Invader 36 | Cygnus 20 | Invader 36 | |
|---|---|---|
| Length overall | 20.0 ft6.10 m | 35.8 ft10.90 m |
| Waterline length | 17.5 ft5.33 m | 24.3 ft7.39 m |
| Beam | 7.0 ft2.13 m | 9.2 ft2.79 m |
| Draft | 2.8 ft0.84 m | 5.0 ft1.52 m |
| Displacement | 950 lb431 kg | 10,550 lb4,785 kg |
| Ballast | 140 lb64 kg | 3,800 lb1,724 kg |
| Sail area | 178 ft²16.5 m² | 504 ft²46.8 m² |
| SA / Displacement | 29.47 | 16.76 |
| Displacement / Length | 79 | 330 |
| Comfort ratio | 6.0 | 30.8 |
| Capsize screening | 2.85 | 1.67 |
| Hull speed (kn) | 5.6 | 6.6 |
Cygnus 20 vs Invader 36: the short version
- The Invader 36 is the larger boat at 35.8 ft10.90 m LOA versus 20.0 ft6.10 m for the Cygnus 20.
- The Invader 36 is heavier, displacing about 1011% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Cygnus 20 carries the more powerful rig (29.5 vs 16.8), favouring lighter-air performance.
- The Invader 36 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Invader 36 rates better for offshore work (1.67 vs 2.85).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.