O'Day 25
O'Day Corp. · designed by C.R. Hunt & Associates · 1975
swing up centerboard or fin keelMasthead sloopUnited States
The O'Day 25 is a 25-foot masthead sloop sailboat designed by C.R. Hunt & Associates and built by O'Day Corp., first launched in 1975.
General
| Builder | O'Day Corp. |
|---|---|
| Designer | C.R. Hunt & Associates |
| Years built | 1975 |
| Hull type | swing up centerboard or fin keel |
| Rig type | Masthead sloop |
| Construction | fiberglass |
| Origin | United States |
Dimensions
| LOA | 24.83 ft7.57 m |
|---|---|
| LWL | 21.00 ft6.40 m |
| Beam | 8.00 ft2.44 m |
| Draft (max) | 2.25 ft0.69 m |
| Displacement | 4,007 lb1,818 kg |
| Ballast | 1,825 lb828 kg |
| Sail Area | 269 ft²25.0 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 17.06 Cruiser — good all-round performance
Ballast / Displacement 45.5 % Higher = stiffer / more sail-carrying power
Displacement / Length 193 Light
Comfort Ratio 17.5 Racing / light coastal
Capsize Screening 2.01 Better suited to coastal use (> 2.0)
Hull Speed 6.1 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
$16,500 typical range $13,000 – $20,000
⚠ 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.
