Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
5.9 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 19.5′, the Windward 21 Luger tops out around 5.9 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √19.5′ LWL = 5.9 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Displacement / Length
108
Ultralight — responsive and fast, but carries less stores.
Hull Speed
5.9kts
Pounds/Inch Immersion
3lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Windward 21 Luger sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Venture 21
South Coast 21
Macgregor 21
Clipper Marine 21
Victory 21
How It Compares
Side-by-side with the boats most often cross-shopped against the Windward 21 Luger.
| Windward 21 Luger | Clipper Marine 21 | Macgregor 21 | South Coast 21 | Venture 21 | Victory 21 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 21.0 | 20.9 | 21.0 | 21.0 | 21.0 | 21.0 |
| LWL | 19.5 | 16.7 | 18.5 | 14.3 | 18.5 | 15.0 |
| Beam | 8.0 | 7.3 | 6.8 | 6.9 | 6.8 | 6.3 |
| Displacement | 1 | 1 | 1 | 2 | 1 | 1 |
| Ballast | — | 410 | 400 | 625 | 400 | 500 |
| Sail Area | — | 192 | — | 206 | — | 185 |
| Performance | ||||||
| PHRF | — | 270 | 263 | 258 | 252 | 276 |
| SA/Disp | — | 20.8 | — | 20.8 | — | 24.3 |
| Bal/Disp | — | 22.8 | 34.0 | 31.3 | 26.7 | 37.0 |
| Comfort | — | 11.1 | — | 14.4 | — | 10.8 |
| Capsize | — | 2.39 | — | 2.20 | — | 2.26 |
| Hull Speed | — | 5.5 | — | 5.1 | — | 5.2 |