The Fastnet 34 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 24.6′, the Fastnet 34 tops out around 6.7 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √24.6′ LWL = 6.6 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
SA / Displacement
16.3
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
41.7%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
285
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
21.6
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
2.12
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
6lbs
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
21.6
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
2.12
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 Fastnet 34 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Moody 34
168s/nm
Mistral 33
189s/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° |
2.6 |
3.3 |
3.7 |
3.8 |
| Close Reach60° |
3.1 |
4.0 |
4.4 |
4.6 |
| Beam Reach90° |
3.8 |
4.9 |
5.4 |
5.7 |
| Broad Reach120–135° |
3.6 |
4.5 |
5.0 |
5.2 |
| Run150–180° |
2.8 |
3.6 |
4.0 |
4.2 |
These are simplified estimates based on hull speed (6.7 kts),
SA/D (16.3), 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 Fastnet 34 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–22 kts
22–32 kts
32+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–22 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
22–32 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
32+ 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 Fastnet 34.
|
Fastnet 34 |
Cc 34 |
Comfort 34 |
Grand Soleil 34 Finot |
Mistral 33 |
Moody 34 |
| Dimensions |
| LOA |
33.5 |
33.5 |
33.5 |
33.4 |
33.4 |
33.4 |
| LWL |
24.6 |
25.9 |
28.7 |
27.0 |
25.8 |
27.8 |
| Beam |
11.2 |
11.0 |
11.4 |
11.3 |
10.1 |
11.7 |
| Displacement |
9 |
10 |
11 |
9 |
12 |
11 |
| Ballast |
3 |
4 |
4 |
3 |
5 |
4 |
| Sail Area |
456 |
517 |
492 |
— |
484 |
— |
| Performance |
| PHRF |
— |
— |
— |
— |
189 |
168 |
| SA/Disp |
16.3 |
17.8 |
15.5 |
— |
14.2 |
— |
| Bal/Disp |
41.7 |
40.6 |
42.3 |
35.6 |
41.5 |
40.2 |
| Comfort |
21.6 |
22.7 |
22.9 |
— |
32.4 |
— |
| Capsize |
2.12 |
2.04 |
2.03 |
— |
1.73 |
— |
| Hull Speed |
6.7 |
6.8 |
7.2 |
— |
6.8 |
— |