The Cal 40 is well-powered with enough sail area to move in light air, with acceptable motion comfort for coastal passages, and respectable in club racing.
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 30.3′, the Cal 40 tops out around 7.4 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √30.3′ LWL = 7.4 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
120s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
SA / Displacement
18.5
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Ballast / Displacement
40.0%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
240
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
28.8
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.79
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
7lbs
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
28.8
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.79
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 Cal 40 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Cal 40
120s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
Swan 40 Ss
126s/nm
Pearson 39
132s/nm
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° |
3.1 |
3.9 |
4.3 |
4.5 |
| Close Reach60° |
3.7 |
4.7 |
5.2 |
5.5 |
| Beam Reach90° |
4.5 |
5.7 |
6.4 |
6.7 |
| Broad Reach120–135° |
4.2 |
5.3 |
5.9 |
6.2 |
| Run150–180° |
3.4 |
4.2 |
4.7 |
4.9 |
These are simplified estimates based on hull speed (7.4 kts),
SA/D (18.5), 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 Cal 40 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–6 kts
6–20 kts
20–30 kts
30+ kts
Ghosting
0–6 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
6–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–30 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
30+ 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 Cal 40.
|
Cal 40 |
Cc 39 |
Columbia 39 Constellation |
J39 |
Pearson 39 |
Swan 40 Ss |
| Dimensions |
| LOA |
39.3 |
39.3 |
39.3 |
39.4 |
39.3 |
39.3 |
| LWL |
30.3 |
31.7 |
25.8 |
32.5 |
30.0 |
28.5 |
| Beam |
11.0 |
11.5 |
10.7 |
12.4 |
11.7 |
10.8 |
| Displacement |
15 |
17 |
15 |
12 |
17 |
19 |
| Ballast |
6 |
— |
6 |
5 |
7 |
7 |
| Sail Area |
700 |
726 |
676 |
799 |
— |
709 |
| Performance |
| PHRF |
120 |
— |
— |
— |
132 |
126 |
| SA/Disp |
18.5 |
17.6 |
17.9 |
23.3 |
— |
16.0 |
| Bal/Disp |
40.0 |
— |
42.7 |
— |
42.9 |
41.6 |
| Comfort |
28.8 |
30.1 |
33.2 |
20.1 |
— |
38.7 |
| Capsize |
1.79 |
1.79 |
1.73 |
2.12 |
— |
1.63 |
| Hull Speed |
7.4 |
7.5 |
6.8 |
7.6 |
— |
7.2 |