The Formosa 41 is modestly canvassed and unhurried, with a gentle bluewater motion.
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 32.0′, the Formosa 41 tops out around 7.6 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √32.0′ LWL = 7.6 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
221s/nm
Heavy or slow cruiser — all about the journey, not the elapsed time.
SA / Displacement
13.6
Modestly canvassed — a comfortable, unhurried cruiser.
Ballast / Displacement
32.9%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
381
Heavy displacement — a slow, steady, seakindly hull.
Comfort Ratio
44.8
Very comfortable in a seaway — a genuine bluewater motion.
Capsize Screening
1.61
Below the 2.0 offshore threshold — acceptable for ocean passages.
SA/Disp (Calculated)
11.8
Computed from measured I/J/P/E rather than reported sail area.
Pounds/Inch Immersion
1lbs
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
44.8
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
1.61
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 Formosa 41 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Gulfstar 41 Kth
159s/nm
Dickerson 41
180s/nm
Ct 41
204s/nm
Sea Tiger 41
216s/nm
Formosa 41
221s/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° |
2.7 |
3.4 |
3.8 |
4.0 |
| Close Reach60° |
3.3 |
4.2 |
4.7 |
4.9 |
| Beam Reach90° |
4.0 |
5.1 |
5.7 |
6.0 |
| Broad Reach120–135° |
3.7 |
4.7 |
5.3 |
5.5 |
| Run150–180° |
3.0 |
3.8 |
4.2 |
4.4 |
These are simplified estimates based on hull speed (7.6 kts),
SA/D (13.6), 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 Formosa 41 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–8 kts
8–22 kts
22–30 kts
30+ kts
Ghosting
0–8 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
8–22 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
22–30 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 Formosa 41.
|
Formosa 41 |
Ct 41 |
Dickerson 41 |
Gulfstar 41 Kth |
Offshore 41 Cheoy Lee |
Sea Tiger 41 |
| Dimensions |
| LOA |
40.9 |
41.0 |
41.0 |
41.0 |
40.9 |
41.0 |
| LWL |
32.0 |
32.5 |
31.5 |
33.0 |
32.5 |
35.0 |
| Beam |
12.2 |
12.1 |
12.5 |
12.0 |
12.8 |
12.0 |
| Displacement |
28 |
27 |
24 |
22 |
21 |
28 |
| Ballast |
9 |
9 |
8 |
7 |
8 |
— |
| Sail Area |
780 |
792 |
846 |
723 |
833 |
769 |
| Performance |
| PHRF |
221 |
204 |
180 |
159 |
— |
216 |
| SA/Disp |
13.6 |
14.0 |
16.1 |
14.8 |
17.5 |
13.4 |
| Bal/Disp |
32.9 |
32.7 |
34.7 |
31.8 |
42.1 |
— |
| Comfort |
44.8 |
43.8 |
38.1 |
35.1 |
31.4 |
43.0 |
| Capsize |
1.61 |
1.61 |
1.72 |
1.72 |
1.85 |
1.58 |
| Hull Speed |
7.6 |
7.6 |
7.5 |
7.7 |
7.6 |
7.9 |