Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
9.9 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 54.7′, the Swan 68 tops out around 9.9 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √54.7′ LWL = 9.9 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
40.0%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
240
Moderate — a good balance of speed and load-carrying ability.
Hull Speed
9.9kts
Pounds/Inch Immersion
21lbs
Weight needed to sink the hull one inch — loading sensitivity.
How It Compares
Side-by-side with the boats most often cross-shopped against the Swan 68.
| Swan 68 | Cnb 66 | Oyster 675 | Oyster 70 | Swan 651 | Swan 70 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 67.7 | 67.6 | 69.1 | 70.0 | 65.7 | 70.1 |
| LWL | 54.7 | 60.5 | 60.1 | 58.0 | 55.1 | 61.7 |
| Beam | 17.8 | 18.1 | 18.5 | 17.3 | 17.5 | 17.5 |
| Displacement | 88 | 68 | 82 | 91 | 75 | 66 |
| Ballast | 35 | 20 | — | 24 | 31 | 23 |
| Sail Area | — | 2 | — | 2 | 2 | 2 |
| Performance | ||||||
| SA/Disp | — | 22.2 | — | 23.8 | 18.8 | 24.6 |
| Bal/Disp | 40.0 | 30.1 | — | — | 42.0 | 36.2 |
| Comfort | — | 35.9 | — | 51.5 | 44.3 | 35.2 |
| Capsize | — | 1.77 | — | 1.54 | 1.66 | 1.74 |
| Hull Speed | — | 10.4 | — | 10.2 | 9.9 | 10.5 |