The Larsen 34 is modestly canvassed and unhurried, 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 30.0′, the Larsen 34 tops out around 7.3 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √30.0′ 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
13.7
Modestly canvassed — a comfortable, unhurried cruiser.
Comfort Ratio
24.7
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.67
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
926lbs
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
24.7
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
1.67
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 Larsen 34 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
J/34
120s/nm
Sabre 34 2
156s/nm
Ericson 34
159s/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 |
3.9 |
| Close Reach60° |
3.2 |
4.1 |
4.5 |
4.7 |
| Beam Reach90° |
3.9 |
5.0 |
5.6 |
5.8 |
| Broad Reach120–135° |
3.6 |
4.6 |
5.1 |
5.3 |
| Run150–180° |
2.9 |
3.7 |
4.1 |
4.3 |
These are simplified estimates based on hull speed (7.3 kts),
SA/D (13.7), 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 Larsen 34 — 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 Larsen 34.
|
Larsen 34 |
Elan 34 |
Ericson 34 |
J/34 |
Sabre 34 2 |
Sweden Yachts 340 |
| Dimensions |
| LOA |
34.1 |
34.1 |
34.1 |
34.1 |
34.2 |
34.0 |
| LWL |
30.0 |
27.8 |
28.9 |
28.5 |
28.3 |
27.9 |
| Beam |
8.6 |
10.8 |
10.8 |
11.4 |
11.2 |
11.5 |
| Displacement |
8 |
9 |
10 |
9 |
11 |
12 |
| Ballast |
3 |
3 |
5 |
3 |
4 |
5 |
| Sail Area |
365 |
— |
494 |
525 |
541 |
598 |
| Performance |
| PHRF |
— |
— |
159 |
120 |
156 |
— |
| SA/Disp |
13.7 |
— |
17.1 |
20.1 |
17.1 |
17.7 |
| Bal/Disp |
— |
35.4 |
50.0 |
41.3 |
— |
41.1 |
| Comfort |
24.7 |
19.7 |
21.5 |
26.2 |
23.8 |
25.3 |
| Capsize |
1.67 |
2.08 |
2.00 |
1.71 |
1.98 |
1.98 |
| Hull Speed |
7.3 |
7.1 |
7.2 |
8.2 |
7.1 |
7.1 |