The Us 27 is moderately powered for comfortable coastal cruising, with a quick, snappy motion best suited to day sailing, 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 23.3′, the Us 27 tops out around 6.5 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √23.3′ LWL = 6.5 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
200s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
SA / Displacement
15.5
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
34.7%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
207
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
18.5
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.11
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
789lbs
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
18.5
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
2.11
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 Us 27 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
J/27
126s/nm
Santa Cruz 27
144s/nm
Hotfoot 27
150s/nm
Us 27
200s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
Cs 27
204s/nm
Precision 27
222s/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° |
2.5 |
3.1 |
3.5 |
3.6 |
| Close Reach60° |
3.0 |
3.8 |
4.2 |
4.4 |
| Beam Reach90° |
3.7 |
4.6 |
5.2 |
5.4 |
| Broad Reach120–135° |
3.4 |
4.3 |
4.8 |
5.0 |
| Run150–180° |
2.7 |
3.4 |
3.8 |
4.0 |
These are simplified estimates based on hull speed (6.5 kts),
SA/D (15.5), 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 Us 27 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–20 kts
20–28 kts
28+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–28 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
28+ 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 Us 27.
|
Us 27 |
Cs 27 |
Hotfoot 27 |
J/27 |
Precision 27 |
Santa Cruz 27 |
| Dimensions |
| LOA |
27.0 |
27.0 |
27.0 |
27.0 |
27.0 |
27.0 |
| LWL |
23.3 |
23.9 |
22.0 |
22.0 |
22.8 |
24.1 |
| Beam |
9.5 |
9.3 |
9.3 |
9.8 |
10.0 |
8.0 |
| Displacement |
5 |
6 |
3 |
4 |
5 |
3 |
| Ballast |
2 |
2 |
1 |
1 |
1 |
1 |
| Sail Area |
313 |
453 |
347 |
338 |
— |
301 |
| Performance |
| PHRF |
200 |
204 |
150 |
126 |
222 |
144 |
| SA/Disp |
15.5 |
21.8 |
23.7 |
22.0 |
— |
23.2 |
| Bal/Disp |
34.7 |
39.3 |
41.7 |
40.0 |
33.3 |
50.0 |
| Comfort |
18.5 |
19.4 |
12.1 |
19.6 |
— |
11.6 |
| Capsize |
2.11 |
2.05 |
2.44 |
1.79 |
— |
2.22 |
| Hull Speed |
6.5 |
6.6 |
6.3 |
7.0 |
— |
6.6 |