Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
7.3 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 29.8′, the Mistress 39 Allied tops out around 7.3 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √29.8′ LWL = 7.3 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
26.9%
Light ballast — tends to be tender; reef earlier than the numbers suggest.
Displacement / Length
350
Moderate-heavy — carries provisions well, deliberate in light air.
Hull Speed
7.3kts
Pounds/Inch Immersion
8lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Mistress 39 Allied sits on the PHRF handicap spectrum — lower numbers mean faster boats.
North American 40
Irwin 39 Citation
How It Compares
Side-by-side with the boats most often cross-shopped against the Mistress 39 Allied.
| Mistress 39 Allied | Cc 40 2 | Irwin 39 Citation | Islander 40 | North American 40 | Offshore 40 Cheoy Lee | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 39.7 | 39.6 | 39.8 | 39.5 | 39.7 | 39.8 |
| LWL | 29.8 | 31.5 | 31.2 | 30.8 | 32.0 | 28.0 |
| Beam | 12.0 | 12.7 | 12.2 | 11.8 | 12.6 | 10.8 |
| Displacement | 20 | 17 | 16 | 17 | 17 | 20 |
| Ballast | 5 | 7 | 6 | 7 | 7 | 7 |
| Sail Area | — | 743 | 769 | 734 | — | 742 |
| Performance | ||||||
| PHRF | — | — | 132 | — | 90 | — |
| SA/Disp | — | 18.1 | 18.8 | 17.8 | — | 15.8 |
| Bal/Disp | 26.9 | 46.5 | 38.5 | — | 45.2 | — |
| Comfort | — | 26.3 | 27.7 | 29.3 | — | 43.0 |
| Capsize | — | 1.97 | 1.90 | 1.84 | — | 1.57 |
| Hull Speed | — | 7.5 | 7.5 | 7.4 | — | 7.1 |