The Opus 34 is modestly canvassed and unhurried, with acceptable motion comfort for coastal passages, designed for cruising comfort rather than 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 24.0′, the Opus 34 tops out around 6.6 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √24.0′ 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.
PHRF Rating
159s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
SA / Displacement
13.6
Modestly canvassed — a comfortable, unhurried cruiser.
Comfort Ratio
26.7
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.90
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
893lbs
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
26.7
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
1.90
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 Opus 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
132s/nm
Opus 34
159s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
Ericson 34
159s/nm
Contest 34
186s/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° |
2.4 |
3.0 |
3.3 |
3.5 |
| Close Reach60° |
2.9 |
3.6 |
4.0 |
4.2 |
| Beam Reach90° |
3.5 |
4.4 |
5.0 |
5.2 |
| Broad Reach120–135° |
3.2 |
4.1 |
4.6 |
4.8 |
| Run150–180° |
2.6 |
3.3 |
3.7 |
3.8 |
These are simplified estimates based on hull speed (6.6 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 Opus 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 Opus 34.
|
Opus 34 |
Contest 34 |
Ericson 34 |
J/34 |
Rival 34 |
Sabre 34 |
| Dimensions |
| LOA |
34.2 |
34.0 |
34.1 |
34.1 |
34.0 |
34.2 |
| LWL |
24.0 |
27.6 |
28.9 |
28.5 |
24.8 |
26.3 |
| Beam |
10.4 |
11.2 |
10.8 |
11.4 |
9.7 |
10.5 |
| Displacement |
10 |
16 |
10 |
9 |
11 |
11 |
| Ballast |
4 |
7 |
5 |
3 |
4 |
4 |
| Sail Area |
409 |
484 |
494 |
525 |
— |
506 |
| Performance |
| PHRF |
159 |
186 |
159 |
120 |
— |
132 |
| SA/Disp |
13.6 |
12.1 |
17.1 |
20.1 |
— |
16.0 |
| Bal/Disp |
— |
— |
— |
41.3 |
39.5 |
— |
| Comfort |
26.7 |
34.4 |
21.5 |
26.2 |
— |
26.9 |
| Capsize |
1.90 |
1.76 |
2.00 |
1.71 |
— |
1.87 |
| Hull Speed |
6.6 |
7.0 |
7.2 |
8.2 |
— |
6.9 |