Southern Cross 28
C. E. Ryder · designed by Thomas C. Gillmer · 1978
fin keelBermuda rigUnited States
The Southern Cross 28 is a 30-foot bermuda rig sailboat designed by Thomas C. Gillmer and built by C. E. Ryder, first launched in 1978.
General
| Builder | C. E. Ryder |
|---|---|
| Designer | Thomas C. Gillmer |
| Years built | 1978 |
| Hull type | fin keel |
| Rig type | Bermuda rig |
| Construction | fiberglass |
| Origin | United States |
Dimensions
| LOA | 30.42 ft9.27 m |
|---|---|
| LWL | 20.17 ft6.15 m |
| Beam | 8.50 ft2.59 m |
| Draft (max) | 4.67 ft1.42 m |
| Displacement | 8,500 lb3,856 kg |
| Ballast | 3,400 lb1,542 kg |
| Sail Area | 415 ft²38.6 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 15.94 Under-canvassed — heavy-air / motorsailing
Ballast / Displacement 40.0 % Higher = stiffer / more sail-carrying power
Displacement / Length 462 Heavy — bluewater displacement
Comfort Ratio 32.7 Moderate bluewater
Capsize Screening 1.67 Suited to offshore passages (≤ 2.0)
Hull Speed 6.0 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
$25,500 typical range $20,500 – $30,500
⚠ 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.
