Hunter 31
Hunter Marine · designed by Cortland Steck · 1983
fin keelMasthead sloop B&R rigUnited States
The Hunter 31 is a 31-foot masthead sloop b&r rig sailboat designed by Cortland Steck and built by Hunter Marine, first launched in 1983.
General
| Builder | Hunter Marine |
|---|---|
| Designer | Cortland Steck |
| Years built | 1983 |
| Hull type | fin keel |
| Rig type | Masthead sloop B&R rig |
| Construction | fiberglass |
| Origin | United States |
Dimensions
| LOA | 31.33 ft9.55 m |
|---|---|
| LWL | 26.25 ft8.00 m |
| Beam | 10.92 ft3.33 m |
| Draft (max) | 5.30 ft1.62 m |
| Displacement | 9,700 lb4,400 kg |
| Ballast | 4,000 lb1,814 kg |
| Sail Area | 458 ft²42.5 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 16.11 Cruiser — good all-round performance
Ballast / Displacement 41.2 % Higher = stiffer / more sail-carrying power
Displacement / Length 239 Moderate
Comfort Ratio 22.4 Coastal cruiser
Capsize Screening 2.05 Better suited to coastal use (> 2.0)
Hull Speed 6.9 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
$28,000 typical range $22,500 – $33,500
⚠ 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.