Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
5.1 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 14.4′, the Menhir tops out around 5.1 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √14.4′ LWL = 5.1 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
35.7%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
91
Ultralight — responsive and fast, but carries less stores.
Hull Speed
5.1kts
Pounds/Inch Immersion
2lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Menhir sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Neptune 16
How It Compares
Side-by-side with the boats most often cross-shopped against the Menhir.
| Menhir | Coronado 15 | Gloucester 16 | Jet Lanaverre | Neptune 16 | Wayfarer | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 15.6 | 15.3 | 15.6 | 15.6 | 15.8 | 15.8 |
| LWL | 14.4 | — | 14.0 | 15.1 | 13.5 | 14.8 |
| Beam | 6.3 | 5.7 | 6.3 | 5.6 | 6.2 | 6.1 |
| Displacement | 617 | 385 | 900 | 265 | 900 | 372 |
| Ballast | 220 | — | 200 | — | 200 | — |
| Sail Area | — | 139 | 137 | 150 | 115 | 141 |
| Performance | ||||||
| PHRF | — | — | — | — | 336 | — |
| SA/Disp | — | 42.1 | 23.6 | 58.2 | 19.8 | 43.7 |
| Bal/Disp | 35.7 | — | 22.2 | — | — | — |
| Comfort | — | 4.3 | 8.4 | 2.7 | 8.7 | 3.4 |
| Capsize | — | 3.12 | 2.59 | 3.48 | 2.56 | 3.38 |
| Hull Speed | — | 4.8 | 5.0 | 5.2 | 4.9 | 5.2 |