Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
6.6 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 24.5′, the Regatta 310 Westerly tops out around 6.6 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √24.5′ LWL = 6.6 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
29.8%
Light ballast — tends to be tender; reef earlier than the numbers suggest.
Displacement / Length
274
Moderate-heavy — carries provisions well, deliberate in light air.
Hull Speed
6.6kts
Pounds/Inch Immersion
6lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Regatta 310 Westerly sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Pearson 31 2
How It Compares
Side-by-side with the boats most often cross-shopped against the Regatta 310 Westerly.
| Regatta 310 Westerly | Etap 32I | First 305 Beneteau | Oceanis 301 Beneteau | Pearson 31 2 | Tempest 31 Westerly | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 30.6 | 30.7 | 30.5 | 30.5 | 30.7 | 30.6 |
| LWL | 24.5 | 26.3 | 26.8 | 26.3 | 25.4 | 24.5 |
| Beam | 10.8 | 11.2 | 10.5 | 10.8 | 10.7 | 10.8 |
| Displacement | 9 | 9 | 8 | 8 | 10 | 9 |
| Ballast | 2 | 2 | 2 | 3 | 3 | 2 |
| Sail Area | — | 588 | 410 | 430 | 493 | 400 |
| Performance | ||||||
| PHRF | — | — | — | — | 180 | — |
| SA/Disp | — | 20.7 | 16.1 | 16.1 | 17.1 | 14.8 |
| Bal/Disp | 29.8 | 29.4 | 36.1 | 35.0 | 38.0 | 29.8 |
| Comfort | — | 21.9 | 19.9 | — | 24.5 | 22.2 |
| Capsize | — | 2.10 | 2.08 | — | 1.98 | 2.08 |
| Hull Speed | — | 6.9 | 6.9 | — | 6.8 | 6.6 |