The Alerion Express 19 is with a quick, snappy motion best suited to day sailing.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
5.8 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 18.9′, the Alerion Express 19 tops out around 5.8 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √18.9′ LWL = 5.8 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Ballast / Displacement
17.1%
Light ballast — tends to be tender; reef earlier than the numbers suggest.
Displacement / Length
115
Ultralight — responsive and fast, but carries less stores.
Comfort Ratio
8.0
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.88
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Hull Speed
5.8kts
Pounds/Inch Immersion
4lbs
Weight needed to sink the hull one inch — loading sensitivity.
Motion & Offshore Suitability
Two ratios that matter most when you're planning passages — how the boat feels in a seaway, and whether the hull geometry is suitable for open ocean.
Comfort Ratio
8.0
Quick, snappy motion — better for day sails and racing than long passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
2.88
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Alerion Express 19 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Flying Scot
Oday 19
How It Compares
Side-by-side with the boats most often cross-shopped against the Alerion Express 19.
| Alerion Express 19 | Com Pac 19 | Com-Pac 19 | Cornish Shrimper 19 | Flying Scot | Oday 19 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 19.2 | 19.0 | 19.0 | 19.3 | 19.0 | 19.0 |
| LWL | 18.9 | 16.3 | 16.5 | 17.5 | 18.5 | 16.7 |
| Beam | 8.7 | 7.0 | 7.5 | 7.2 | 6.8 | 7.8 |
| Displacement | 1 | 2 | 2 | 2 | 850 | 2 |
| Ballast | 300 | 800 | 750 | 700 | — | 300 |
| Sail Area | — | 145 | 165 | 194 | 191 | 179 |
| Performance | ||||||
| PHRF | — | — | — | — | 204 | 220 |
| SA/Disp | — | 14.7 | 15.6 | 17.6 | 34.1 | 17.9 |
| Bal/Disp | 17.1 | 40.0 | 34.1 | 29.8 | — | — |
| Comfort | 8.0 | 13.5 | 13.4 | 14.6 | 5.5 | 11.9 |
| Capsize | 2.88 | 2.22 | 2.31 | 2.16 | 2.85 | 2.45 |
| Hull Speed | 5.8 | 5.4 | 5.4 | 5.6 | 5.8 | 5.5 |