The Irwin 52 is moderately powered for comfortable coastal cruising, with a gentle bluewater motion, 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 44.0′, the Irwin 52 tops out around 8.9 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √44.0′ 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.
PHRF Rating
117s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
SA / Displacement
15.2
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
29.3%
Light ballast — tends to be tender; reef earlier than the numbers suggest.
Displacement / Length
288
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
48.3
Very comfortable in a seaway — a genuine bluewater motion.
Capsize Screening
1.62
Below the 2.0 offshore threshold — acceptable for ocean passages.
SA/Disp (Calculated)
13.3
Computed from measured I/J/P/E rather than reported sail area.
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
48.3
Very comfortable in a seaway — a genuine bluewater motion.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.62
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 Irwin 52 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Tayana 52
99s/nm
Irwin 52
117s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
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° |
3.4 |
4.2 |
4.7 |
4.9 |
| Close Reach60° |
4.1 |
5.1 |
5.7 |
6.0 |
| Beam Reach90° |
5.0 |
6.3 |
7.0 |
7.3 |
| Broad Reach120–135° |
4.6 |
5.8 |
6.5 |
6.8 |
| Run150–180° |
3.7 |
4.7 |
5.2 |
5.4 |
These are simplified estimates based on hull speed (8.9 kts),
SA/D (15.2), 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 Irwin 52 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–18 kts
18–26 kts
26+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–18 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
18–26 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
26+ 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 Irwin 52.
|
Irwin 52 |
Endeavour 52 |
Gulfstar 52 Ms |
Irwin 52 2 |
Morgan Out Island 51 |
Tayana 52 |
| Dimensions |
| LOA |
52.0 |
52.3 |
51.7 |
52.0 |
51.5 |
52.4 |
| LWL |
44.0 |
42.3 |
45.3 |
46.0 |
43.0 |
42.1 |
| Beam |
15.3 |
15.0 |
13.9 |
15.3 |
15.8 |
15.0 |
| Displacement |
55 |
35 |
38 |
44 |
46 |
38 |
| Ballast |
16 |
14 |
8 |
— |
12 |
14 |
| Sail Area |
1 |
1 |
1 |
1 |
— |
1 |
| Performance |
| PHRF |
117 |
— |
— |
— |
— |
99 |
| SA/Disp |
15.2 |
16.7 |
16.7 |
14.5 |
— |
16.3 |
| Bal/Disp |
29.3 |
41.4 |
— |
— |
26.1 |
— |
| Comfort |
48.3 |
32.4 |
37.3 |
38.0 |
— |
35.8 |
| Capsize |
1.62 |
1.84 |
1.66 |
1.73 |
— |
1.78 |
| Hull Speed |
8.9 |
8.7 |
9.0 |
9.1 |
— |
8.7 |