Corvette 31
C&C Yachts at the Belleville Marine Yard (Morch Marine) · designed by C&C Design · 1965
long keel with centreboardMasthead sloopCanada
The Corvette 31 is a 31-foot masthead sloop sailboat designed by C&C Design and built by C&C Yachts at the Belleville Marine Yard (Morch Marine), first launched in 1965.
General
| Builder | C&C Yachts at the Belleville Marine Yard (Morch Marine) |
|---|---|
| Designer | C&C Design |
| Years built | 1965 |
| Hull type | long keel with centreboard |
| Rig type | Masthead sloop |
| Construction | fiberglass |
| Origin | Canada |
Dimensions
| LOA | 31.16 ft9.50 m |
|---|---|
| LWL | 22.50 ft6.86 m |
| Beam | 9.08 ft2.77 m |
| Draft (max) | 7.00 ft2.13 m |
| Displacement | 8,545 lb3,876 kg |
| Ballast | 4,000 lb1,814 kg |
| Sail Area | 444 ft²41.2 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 17.00 Cruiser — good all-round performance
Ballast / Displacement 46.8 % Higher = stiffer / more sail-carrying power
Displacement / Length 335 Heavy — bluewater displacement
Comfort Ratio 27.9 Coastal cruiser
Capsize Screening 1.78 Suited to offshore passages (≤ 2.0)
Hull Speed 6.4 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
$25,000 typical range $20,000 – $30,000
⚠ 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.
