Impulse vs OK Dinghy
How do the Impulse and OK Dinghy compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Impulse 
OK Dinghy | Impulse | OK Dinghy | |
|---|---|---|
| Length overall | 13.1 ft4.00 m | 13.1 ft4.00 m |
| Waterline length | —— | —— |
| Beam | 4.9 ft1.51 m | 4.7 ft1.42 m |
| Draft | 2.0 ft0.61 m | 3.0 ft0.91 m |
| Displacement | 104 lb47 kg | 187 lb85 kg |
| Ballast | —— | —— |
| Sail area | 83 ft²7.7 m² | —— |
| SA / Displacement | 60.05 | — |
| Displacement / Length | — | — |
| Comfort ratio | — | — |
| Capsize screening | 4.20 | 3.26 |
| Hull speed (kn) | — | — |
Impulse vs OK Dinghy: the short version
- The Impulse and OK Dinghy are close in length (13.1 ft4.00 m vs 13.1 ft4.00 m ).
- The OK Dinghy is heavier, displacing about 80% more, which usually means a steadier but slower-to-accelerate hull.
- By the capsize screening formula the OK Dinghy rates better for offshore work (3.26 vs 4.20).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.