O'Day 30
O'Day Corp. · designed by C.R. Hunt & Associates · 1977
fin keelBermuda rigUnited States
The O'Day 30 is a 30-foot bermuda rig sailboat designed by C.R. Hunt & Associates and built by O'Day Corp., first launched in 1977.
General
| Builder | O'Day Corp. |
|---|---|
| Designer | C.R. Hunt & Associates |
| Years built | 1977 |
| Hull type | fin keel |
| Rig type | Bermuda rig |
| Construction | fiberglass |
| Origin | United States |
Dimensions
| LOA | 29.92 ft9.12 m |
|---|---|
| LWL | 25.42 ft7.75 m |
| Beam | 10.75 ft3.28 m |
| Draft (max) | 4.90 ft1.49 m |
| Displacement | 10,150 lb4,604 kg |
| Ballast | 4,000 lb1,814 kg |
| Sail Area | 441 ft²41.0 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 15.05 Under-canvassed — heavy-air / motorsailing
Ballast / Displacement 39.4 % Higher = stiffer / more sail-carrying power
Displacement / Length 276 Moderate
Comfort Ratio 24.8 Coastal cruiser
Capsize Screening 1.99 Suited to offshore passages (≤ 2.0)
Hull Speed 6.8 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
$24,500 typical range $19,500 – $29,500
⚠ 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.
