Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
6.7 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 25.2′, the Willing 31 tops out around 6.7 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √25.2′ LWL = 6.7 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Ballast / Displacement
37.1%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
196
Moderate — a good balance of speed and load-carrying ability.
Hull Speed
6.7kts
Pounds/Inch Immersion
6lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Willing 31 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Rasmus 31
How It Compares
Side-by-side with the boats most often cross-shopped against the Willing 31.
| Willing 31 | Berwick 31 Westerly | Inferno 31 | Longbow 31 Westerly | Rasmus 31 | Rival 31 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 31.0 | 31.0 | 31.0 | 31.0 | 31.0 | 31.0 |
| LWL | 25.2 | 25.0 | 25.6 | 25.0 | 24.8 | 24.5 |
| Beam | 10.3 | 9.5 | 9.8 | 9.5 | 10.0 | 9.7 |
| Displacement | 7 | 9 | 9 | 9 | 9 | 11 |
| Ballast | 2 | 4 | 2 | 4 | — | 4 |
| Sail Area | — | 424 | 512 | 371 | 414 | — |
| Performance | ||||||
| PHRF | — | — | — | — | 201 | — |
| SA/Disp | — | 14.9 | 18.4 | 13.4 | 14.8 | — |
| Bal/Disp | 37.1 | 45.3 | — | — | — | 40.0 |
| Comfort | — | 28.1 | 25.6 | 27.0 | 25.7 | 31.9 |
| Capsize | — | 1.78 | 1.86 | 1.80 | 1.89 | 1.73 |
| Hull Speed | — | 6.7 | 6.8 | 6.7 | 6.7 | 6.6 |