Impulse 21 vs Mistral T-21
How do the Impulse 21 and Mistral T-21 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Impulse 21 
Mistral T-21 | Impulse 21 | Mistral T-21 | |
|---|---|---|
| Length overall | 21.0 ft6.40 m | 21.0 ft6.40 m |
| Waterline length | 18.5 ft5.64 m | 18.7 ft5.69 m |
| Beam | 8.0 ft2.44 m | 8.2 ft2.49 m |
| Draft | 3.3 ft0.99 m | 5.1 ft1.55 m |
| Displacement | 1,300 lb590 kg | 2,700 lb1,225 kg |
| Ballast | 600 lb272 kg | 770 lb349 kg |
| Sail area | 207 ft²19.2 m² | 228 ft²21.2 m² |
| SA / Displacement | 27.81 | 18.81 |
| Displacement / Length | 92 | 185 |
| Comfort ratio | 6.5 | 13.1 |
| Capsize screening | 2.93 | 2.34 |
| Hull speed (kn) | 5.8 | 5.8 |
Impulse 21 vs Mistral T-21: the short version
- The Impulse 21 and Mistral T-21 are close in length (21.0 ft6.40 m vs 21.0 ft6.40 m ).
- The Mistral T-21 is heavier, displacing about 108% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Impulse 21 carries the more powerful rig (27.8 vs 18.8), favouring lighter-air performance.
- The Mistral T-21 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Mistral T-21 rates better for offshore work (2.34 vs 2.93).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.