Formula 18
various · designed by various · 1994
optional: daggerboards / centerboardssport catamaran
The Formula 18 is a 18-foot sport catamaran sailboat designed by various and built by various, first launched in 1994.
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General
| Builder | various |
|---|---|
| Designer | various |
| Years built | 1994 |
| Hull type | optional: daggerboards / centerboards |
| Rig type | sport catamaran |
| Construction | — |
| Origin | — |
Dimensions
| LOA | 18.11 ft5.52 m |
|---|---|
| LWL | —— |
| Beam | 8.53 ft2.60 m |
| Draft (max) | 4.59 ft1.40 m |
| Displacement | 397 lb180 kg |
| Ballast | —— |
| Sail Area | 229 ft²21.3 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 67.83 Performance / racer — powered up
Capsize Screening 4.64 Better suited to coastal use (> 2.0)
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
$10,500 typical range $8,500 – $12,500
⚠ 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.
