Hullmaster 27
Hullmaster Boats/DS Yachts · designed by Edward S. Brewer · 1974
fin keelMasthead sloopCanada
The Hullmaster 27 is a 27-foot masthead sloop sailboat designed by Edward S. Brewer and built by Hullmaster Boats/DS Yachts, first launched in 1974.
General
| Builder | Hullmaster Boats/DS Yachts |
|---|---|
| Designer | Edward S. Brewer |
| Years built | 1974 |
| Hull type | fin keel |
| Rig type | Masthead sloop |
| Construction | fiberglass |
| Origin | Canada |
Dimensions
| LOA | 27.25 ft8.31 m |
|---|---|
| LWL | 21.50 ft6.55 m |
| Beam | 9.25 ft2.82 m |
| Draft (max) | 4.25 ft1.30 m |
| Displacement | 7,400 lb3,357 kg |
| Ballast | 3,000 lb1,361 kg |
| Sail Area | 398 ft²37.0 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 16.77 Cruiser — good all-round performance
Ballast / Displacement 40.5 % Higher = stiffer / more sail-carrying power
Displacement / Length 332 Heavy — bluewater displacement
Comfort Ratio 25.4 Coastal cruiser
Capsize Screening 1.90 Suited to offshore passages (≤ 2.0)
Hull Speed 6.2 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
$20,000 typical range $16,000 – $24,000
⚠ 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.
