Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
7.2 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 28.5′, the Pj 40 Ss tops out around 7.2 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √28.5′ LWL = 7.2 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Ballast / Displacement
41.6%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
365
Heavy displacement — a slow, steady, seakindly hull.
Hull Speed
7.2kts
Pounds/Inch Immersion
7lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Pj 40 Ss sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Swan 39
Cal 40
Swan 40 Ss
Pearson 39
How It Compares
Side-by-side with the boats most often cross-shopped against the Pj 40 Ss.
| Pj 40 Ss | Cal 40 | Cc 39 | Pearson 39 | Swan 39 | Swan 40 Ss | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 39.3 | 39.3 | 39.3 | 39.3 | 39.3 | 39.3 |
| LWL | 28.5 | 30.3 | 31.7 | 30.0 | 31.5 | 28.5 |
| Beam | 10.8 | 11.0 | 11.5 | 11.7 | 12.5 | 10.8 |
| Displacement | 19 | 15 | 17 | 17 | 18 | 19 |
| Ballast | 7 | 6 | — | 7 | 7 | 7 |
| Sail Area | — | 700 | 726 | — | 761 | 709 |
| Performance | ||||||
| PHRF | — | 120 | — | 132 | 84 | 126 |
| SA/Disp | — | 18.5 | 17.6 | — | 17.8 | 16.0 |
| Bal/Disp | 41.6 | 40.0 | — | 42.9 | 43.9 | 41.6 |
| Comfort | — | 28.8 | 30.1 | — | 28.5 | 38.7 |
| Capsize | — | 1.79 | 1.79 | — | 1.91 | 1.63 |
| Hull Speed | — | 7.4 | 7.5 | — | 7.5 | 7.2 |