Halman 20
Halman Manufacturing · 1977
long keelMasthead sloopCanada
The Halman 20 is a 20-foot masthead sloop sailboat built by Halman Manufacturing, first launched in 1977.
General
| Builder | Halman Manufacturing |
|---|---|
| Designer | — |
| Years built | 1977 |
| Hull type | long keel |
| Rig type | Masthead sloop |
| Construction | fiberglass |
| Origin | Canada |
Dimensions
| LOA | 19.67 ft6.00 m |
|---|---|
| LWL | 17.08 ft5.21 m |
| Beam | 7.75 ft2.36 m |
| Draft (max) | 2.83 ft0.86 m |
| Displacement | 2,500 lb1,134 kg |
| Ballast | 1,000 lb454 kg |
| Sail Area | 179 ft²16.6 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 15.55 Under-canvassed — heavy-air / motorsailing
Ballast / Displacement 40.0 % Higher = stiffer / more sail-carrying power
Displacement / Length 224 Moderate
Comfort Ratio 14.1 Racing / light coastal
Capsize Screening 2.28 Better suited to coastal use (> 2.0)
Hull Speed 5.5 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
$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.
