The Cornish Crabber 24 is moderately powered for comfortable coastal cruising, 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.
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 20.3′, the Cornish Crabber 24 tops out around 6.0 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √20.3′ LWL = 6.0 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
PHRF Rating
360s/nm
Heavy or slow cruiser — all about the journey, not the elapsed time.
SA / Displacement
17.7
Moderate sail power — a capable coastal cruiser, not overpowered.
Displacement / Length
247
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
19.4
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
1.93
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
579lbs
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
19.4
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
1.93
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 Cornish Crabber 24 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Shipman 28
198s/nm
Alberg 29
225s/nm
Cornish Crabber 24
360s/nm
Heavy or slow cruiser — all about the journey, not the elapsed time.
Estimated Speed by Wind
Rough boat speed estimates at different true wind speeds and points of sail — derived from hull speed, SA/D, and displacement, not measured polars.
| Point of Sail |
6 kts TWS |
10 kts TWS |
15 kts TWS |
20 kts TWS |
| Close-hauled40–50° |
2.4 |
3.1 |
3.5 |
3.6 |
| Close Reach60° |
3.0 |
3.7 |
4.2 |
4.4 |
| Beam Reach90° |
3.6 |
4.6 |
5.1 |
5.3 |
| Broad Reach120–135° |
3.4 |
4.2 |
4.7 |
4.9 |
| Run150–180° |
2.7 |
3.4 |
3.8 |
4.0 |
These are simplified estimates based on hull speed (6.0 kts),
SA/D (17.7), and empirical efficiency curves — not instrument-measured
polars. Real-world speed varies with sea state, bottom condition, sail trim, and current.
Speeds in gold approach hull speed;
bold gold means near or at hull speed.
Wind Range & Comfort Envelope
Estimated wind ranges for comfortable sailing on the Cornish Crabber 24 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–20 kts
20–28 kts
28+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–28 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
28+ kts
Storm conditions. Storm jib or bare poles. Seek shelter if coastal.
How It Compares
Side-by-side with the boats most often cross-shopped against the Cornish Crabber 24.
|
Cornish Crabber 24 |
Alberg 29 |
Cornish Crabber 24 Mk I |
Hallberg Rassy 29 |
Samphire 29 |
Shipman 28 |
| Dimensions |
| LOA |
29.3 |
29.3 |
29.3 |
29.2 |
29.2 |
29.1 |
| LWL |
20.3 |
22.3 |
20.3 |
23.8 |
22.2 |
21.0 |
| Beam |
8.0 |
9.2 |
8.0 |
9.3 |
8.6 |
8.5 |
| Displacement |
4 |
9 |
4 |
8 |
8 |
6 |
| Ballast |
— |
4 |
— |
3 |
— |
2 |
| Sail Area |
305 |
417 |
305 |
538 |
— |
349 |
| Performance |
| PHRF |
360 |
225 |
— |
— |
— |
198 |
| SA/Disp |
17.7 |
15.5 |
17.7 |
20.9 |
— |
15.9 |
| Bal/Disp |
— |
44.4 |
— |
46.1 |
— |
— |
| Comfort |
19.4 |
29.9 |
19.4 |
26.2 |
— |
25.1 |
| Capsize |
1.93 |
1.77 |
1.93 |
1.83 |
— |
1.82 |
| Hull Speed |
6.0 |
6.3 |
6.0 |
6.5 |
— |
6.1 |