Swan 51
Oy Nautor AB · designed by Germán Frers · 1981
Fin keelBermuda rigArgentina
The Swan 51 is a 42-foot bermuda rig sailboat designed by Germán Frers and built by Oy Nautor AB, first launched in 1981.
General
| Builder | Oy Nautor AB |
|---|---|
| Designer | Germán Frers |
| Years built | 1981 |
| Hull type | Fin keel |
| Rig type | Bermuda rig |
| Construction | — |
| Origin | Argentina |
Dimensions
| LOA | 42.32 ft12.90 m |
|---|---|
| LWL | 42.32 ft12.90 m |
| Beam | 14.67 ft4.47 m |
| Draft (max) | 8.89 ft2.71 m |
| Displacement | 39,602 lb17,963 kg |
| Ballast | 16,500 lb7,484 kg |
| Sail Area | 1,291 ft²119.9 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 17.78 Cruiser — good all-round performance
Ballast / Displacement 41.7 % Higher = stiffer / more sail-carrying power
Displacement / Length 233 Moderate
Comfort Ratio 40.4 Heavy offshore
Capsize Screening 1.72 Suited to offshore passages (≤ 2.0)
Hull Speed 8.7 kn Theoretical max displacement speed
How these numbers are calculated
- SA / Displacement
SA ÷ (Disp ÷ 64)^(2/3)— Power-to-weight. < 16 under-canvassed, 16–20 cruiser, > 20 racer.- Ballast / Displacement
Ballast ÷ Disp × 100— Stability/stiffness. Higher carries sail better.- Displacement / Length
Disp(lt) ÷ (0.01 · LWL)³— < 100 ultralight, 100–200 light, 200–300 moderate, > 300 heavy.- Comfort Ratio (Brewer)
Disp ÷ (0.65 · (0.7·LWL + 0.3·LOA) · Beam^1.33)— Motion in a seaway. Higher = more comfortable offshore.- Capsize Screening
Beam ÷ (Disp ÷ 64)^(1/3)— ≤ 2.0 favored for offshore; > 2.0 better for coastal use.- Hull Speed
1.34 · √LWL— Theoretical max displacement speed in knots.
Estimated price
$50,500 typical range $40,500 – $60,500
⚠ Rough estimate only — not market data. Derived from a simple model based on length and hull age; actual asking prices vary widely with condition, equipment, engine hours and location.
