Sirius 28
Vandestadt · designed by Hubert Vandestadt · 1982
fin keelMasthead sloopCanada
The Sirius 28 is a 28-foot masthead sloop sailboat designed by Hubert Vandestadt and built by Vandestadt, first launched in 1982.
General
| Builder | Vandestadt |
|---|---|
| Designer | Hubert Vandestadt |
| Years built | 1982 |
| Hull type | fin keel |
| Rig type | Masthead sloop |
| Construction | fiberglass |
| Origin | Canada |
Dimensions
| LOA | 28.00 ft8.53 m |
|---|---|
| LWL | 24.00 ft7.32 m |
| Beam | 9.67 ft2.95 m |
| Draft (max) | 4.30 ft1.31 m |
| Displacement | 6,700 lb3,039 kg |
| Ballast | 2,600 lb1,179 kg |
| Sail Area | 379 ft²35.2 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 17.06 Cruiser — good all-round performance
Ballast / Displacement 38.8 % Higher = stiffer / more sail-carrying power
Displacement / Length 216 Moderate
Comfort Ratio 20.0 Coastal cruiser
Capsize Screening 2.05 Better suited to coastal use (> 2.0)
Hull Speed 6.6 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
$22,500 typical range $18,000 – $27,000
⚠ 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.
