The Cc 51 Custom is with a steady, comfortable ride offshore.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
8.9 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 43.9′, the Cc 51 Custom tops out around 8.9 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √43.9′ LWL = 8.9 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Ballast / Displacement
40.8%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
178
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
35.0
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.68
Below the 2.0 offshore threshold — acceptable for ocean passages.
Hull Speed
8.9kts
Pounds/Inch Immersion
2lbs
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
35.0
Good offshore comfort — steady enough for multi-day passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.68
Below the 2.0 offshore threshold — acceptable for ocean passages.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Cc 51 Custom sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Swan 51
How It Compares
Side-by-side with the boats most often cross-shopped against the Cc 51 Custom.
| Cc 51 Custom | Endeavour 52 | First 51 Beneteau | Swan 51 | Sweden Yachts 52 | X 512 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 51.8 | 52.3 | 51.3 | 51.3 | 52.0 | 51.1 |
| LWL | 43.9 | 42.3 | 43.1 | 42.3 | 41.3 | 41.5 |
| Beam | 13.6 | 15.0 | 14.9 | 14.7 | 14.3 | 14.8 |
| Displacement | 33 | 35 | 28 | 39 | 33 | 30 |
| Ballast | 13 | 14 | 14 | 16 | 13 | 13 |
| Sail Area | — | 1 | 1,248 | 1 | 1 | 1 |
| Performance | ||||||
| PHRF | — | — | — | 36 | — | — |
| SA/Disp | — | 16.7 | 21.4 | 17.9 | 25.1 | 22.7 |
| Bal/Disp | 40.8 | 41.4 | 49.6 | 41.7 | — | — |
| Comfort | 35.0 | 32.4 | 26.6 | 38.0 | 34.1 | 28.9 |
| Capsize | 1.68 | 1.84 | 1.95 | 1.73 | 1.77 | 1.91 |
| Hull Speed | 8.9 | 8.7 | 8.8 | 8.7 | 8.6 | 8.6 |