Javelin dinghy
O'Day Corp. · designed by Uffa Fox · 1960
centerboardBermuda rigUnited States
The Javelin dinghy is a 18-foot bermuda rig sailboat designed by Uffa Fox and built by O'Day Corp., first launched in 1960.
General
| Builder | O'Day Corp. |
|---|---|
| Designer | Uffa Fox |
| Years built | 1960 |
| Hull type | centerboard |
| Rig type | Bermuda rig |
| Construction | fiberglass |
| Origin | United States |
Dimensions
| LOA | 17.65 ft5.38 m |
|---|---|
| LWL | 13.17 ft4.01 m |
| Beam | 5.58 ft1.70 m |
| Draft (max) | 3.83 ft1.17 m |
| Displacement | 475 lb215 kg |
| Ballast | 49 lb22 kg |
| Sail Area | 125 ft²11.6 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 32.85 Performance / racer — powered up
Ballast / Displacement 10.3 % Higher = stiffer / more sail-carrying power
Displacement / Length 93 Ultralight
Comfort Ratio 5.1 Racing / light coastal
Capsize Screening 2.86 Better suited to coastal use (> 2.0)
Hull Speed 4.9 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
$8,000 typical range $6,500 – $9,500
⚠ 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.
