Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
4.2 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 10.0′, the Weasel tops out around 4.2 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √10.0′ LWL = 4.2 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Displacement / Length
71
Ultralight — responsive and fast, but carries less stores.
Hull Speed
4.2kts
Pounds/Inch Immersion
1lbs
Weight needed to sink the hull one inch — loading sensitivity.
How It Compares
Side-by-side with the boats most often cross-shopped against the Weasel.
| Weasel | Classic Moth | Interclub Usa | Penguin | Sailfish Alcort | Slipper Ray Greene | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 11.3 | 11.0 | 11.5 | 11.4 | 11.6 | 12.0 |
| LWL | 10.0 | — | 11.5 | — | — | — |
| Beam | 5.5 | 5.0 | 4.6 | 4.7 | 2.6 | 5.2 |
| Displacement | 160 | 75 | 150 | 140 | 82 | 250 |
| Sail Area | — | 72 | 72 | — | — | 110 |
| Performance | ||||||
| SA/Disp | — | 64.8 | 40.8 | — | — | 44.4 |
| Comfort | — | — | 2.7 | 2.7 | 3.3 | — |
| Capsize | — | 4.74 | 3.45 | — | — | 3.28 |
| Hull Speed | — | — | 4.5 | 4.2 | 4.2 | — |