The F3 is well-powered with enough sail area to move in light air, 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 29.5′, the F3 tops out around 7.3 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √29.5′ LWL = 7.3 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
20.6
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Ballast / Displacement
52.6%
Race-oriented ballast ratio — very stiff and powerful.
Displacement / Length
190
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
20.0
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.13
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
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
20.0
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
2.13
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 F3 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
J/36
84s/nm
Catalina 36
138s/nm
Catalina 36 Mkii
144s/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° |
3.2 |
4.0 |
4.5 |
4.7 |
| Close Reach60° |
3.9 |
4.9 |
5.5 |
5.7 |
| Beam Reach90° |
4.7 |
6.0 |
6.7 |
7.3 |
| Broad Reach120–135° |
4.4 |
5.5 |
6.2 |
6.7 |
| Run150–180° |
3.5 |
4.4 |
4.9 |
5.2 |
These are simplified estimates based on hull speed (7.3 kts),
SA/D (20.6), 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 F3 — 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 F3.
|
F3 |
Catalina 36 |
Catalina 36 Mkii |
Cc 110 |
J/36 |
Pearson 367 |
| Dimensions |
| LOA |
36.4 |
36.3 |
36.3 |
36.3 |
36.3 |
36.4 |
| LWL |
29.5 |
30.3 |
31.0 |
31.5 |
30.0 |
30.0 |
| Beam |
11.8 |
11.9 |
12.0 |
12.0 |
11.3 |
11.5 |
| Displacement |
10 |
13 |
14 |
10 |
11 |
17 |
| Ballast |
5 |
6 |
6 |
4 |
4 |
7 |
| Sail Area |
630 |
545 |
625 |
706 |
600 |
600 |
| Performance |
| PHRF |
— |
138 |
144 |
— |
84 |
— |
| SA/Disp |
20.6 |
15.4 |
16.5 |
23.1 |
19.5 |
14.2 |
| Bal/Disp |
52.6 |
44.4 |
40.3 |
— |
38.2 |
41.2 |
| Comfort |
20.0 |
24.0 |
25.6 |
18.7 |
29.1 |
33.1 |
| Capsize |
2.13 |
2.01 |
1.95 |
2.17 |
1.65 |
1.77 |
| Hull Speed |
7.3 |
7.4 |
7.5 |
7.5 |
8.6 |
7.3 |