The Cooper 367 is moderately powered for comfortable coastal cruising, with acceptable motion comfort for coastal passages.
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 28.5′, the Cooper 367 tops out around 7.2 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √28.5′ LWL = 7.2 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
SA / Displacement
16.1
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
39.6%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
256
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
24.2
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
2.03
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
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
24.2
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
2.03
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 Cooper 367 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Cs 36
126s/nm
Pearson 36 2
138s/nm
Union 36
180s/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° |
2.8 |
3.5 |
3.9 |
4.1 |
| Close Reach60° |
3.4 |
4.2 |
4.7 |
4.9 |
| Beam Reach90° |
4.1 |
5.2 |
5.8 |
6.1 |
| Broad Reach120–135° |
3.8 |
4.8 |
5.4 |
5.6 |
| Run150–180° |
3.0 |
3.8 |
4.3 |
4.5 |
These are simplified estimates based on hull speed (7.2 kts),
SA/D (16.1), 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 Cooper 367 — 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 Cooper 367.
|
Cooper 367 |
Banner 37 |
Cs 36 |
Pearson 36 2 |
Pearson 367 |
Union 36 |
| Dimensions |
| LOA |
36.6 |
36.6 |
36.5 |
36.5 |
36.4 |
36.7 |
| LWL |
28.5 |
28.8 |
29.3 |
29.6 |
30.0 |
32.0 |
| Beam |
12.0 |
12.0 |
11.5 |
12.3 |
11.5 |
11.3 |
| Displacement |
13 |
13 |
15 |
15 |
17 |
22 |
| Ballast |
5 |
5 |
6 |
5 |
7 |
7 |
| Sail Area |
561 |
653 |
822 |
— |
600 |
— |
| Performance |
| PHRF |
— |
— |
126 |
138 |
— |
180 |
| SA/Disp |
16.1 |
18.5 |
21.2 |
— |
14.2 |
— |
| Bal/Disp |
39.6 |
40.7 |
41.9 |
38.7 |
41.2 |
35.5 |
| Comfort |
24.2 |
24.5 |
29.5 |
— |
33.1 |
— |
| Capsize |
2.03 |
2.02 |
1.85 |
— |
1.77 |
— |
| Hull Speed |
7.2 |
7.2 |
7.3 |
— |
7.3 |
— |