The Herreshoff Eagle 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.
5.7 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 18.0′, the Herreshoff Eagle tops out around 5.7 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √18.0′ LWL = 5.7 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
25.9%
Light ballast — tends to be tender; reef earlier than the numbers suggest.
Displacement / Length
207
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
13.2
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.35
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Hull Speed
5.7kts
Pounds/Inch Immersion
588lbs
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
13.2
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
2.35
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 Herreshoff Eagle sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Shields
How It Compares
Side-by-side with the boats most often cross-shopped against the Herreshoff Eagle.
| Herreshoff Eagle | Atlantic | Shields | |
|---|---|---|---|
| Dimensions | |||
| LOA | 22.0 | 30.5 | 30.2 |
| LWL | 18.0 | 21.5 | 20.0 |
| Beam | 8.2 | 6.5 | 6.4 |
| Displacement | 2,700 | 4,559 | 4 |
| Ballast | 700 | 2,835 | 3 |
| Sail Area | — | 377 | 360 |
| Performance | |||
| PHRF | — | — | 176 |
| SA/Disp | — | 21.9 | 20.9 |
| Bal/Disp | 25.9 | 62.2 | 67.0 |
| Comfort | 13.2 | 23.9 | 25.9 |
| Capsize | 2.35 | 1.57 | 1.55 |
| Hull Speed | 5.7 | 6.2 | 6.0 |