O'Day 23
O'Day Corporation · designed by C. Raymond Hunt Assoc. · 1978
CenterboardMasthead sloopUnited States
The O'Day 23 is a 23-foot masthead sloop sailboat designed by C. Raymond Hunt Assoc. and built by O'Day Corporation, first launched in 1978.
General
| Builder | O'Day Corporation |
|---|---|
| Designer | C. Raymond Hunt Assoc. |
| Years built | 1978 |
| Hull type | Centerboard |
| Rig type | Masthead sloop |
| Construction | fiberglass |
| Origin | United States |
Dimensions
| LOA | 23.00 ft7.01 m |
|---|---|
| LWL | 19.50 ft5.94 m |
| Beam | 7.92 ft2.41 m |
| Draft (max) | 5.33 ft1.62 m |
| Displacement | 3,425 lb1,554 kg |
| Ballast | 1,200 lb544 kg |
| Sail Area | 245 ft²22.8 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 17.25 Cruiser — good all-round performance
Ballast / Displacement 35.0 % Higher = stiffer / more sail-carrying power
Displacement / Length 206 Moderate
Comfort Ratio 16.4 Racing / light coastal
Capsize Screening 2.10 Better suited to coastal use (> 2.0)
Hull Speed 5.9 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
$14,500 typical range $11,500 – $17,500
⚠ 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.
