The B 25 Beiley is aggressively canvassed for its weight, 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 21.3′, the B 25 Beiley tops out around 6.2 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √21.3′ LWL = 6.2 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
27.6
Performance-oriented — carries a lot of canvas for its weight.
Ballast / Displacement
40.0%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
93
Ultralight — responsive and fast, but carries less stores.
Comfort Ratio
8.2
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.65
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
SA/Disp (Calculated)
28.3
Computed from measured I/J/P/E rather than reported sail area.
Pounds/Inch Immersion
632lbs
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
8.2
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
2.65
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 B 25 Beiley sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Olson 25
162s/nm
Hunter 25.5
206s/nm
Pearson 25
216s/nm
Com-Pac 25
222s/nm
Catalina 25
223s/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° |
2.9 |
3.7 |
4.1 |
4.3 |
| Close Reach60° |
3.5 |
4.4 |
5.0 |
5.2 |
| Beam Reach90° |
4.3 |
5.5 |
6.1 |
6.6 |
| Broad Reach120–135° |
4.0 |
5.0 |
5.6 |
6.1 |
| Run150–180° |
3.2 |
4.0 |
4.5 |
4.7 |
These are simplified estimates based on hull speed (6.2 kts),
SA/D (27.6), 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 B 25 Beiley — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–5 kts
5–18 kts
18–28 kts
28+ kts
Ghosting
0–5 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
5–18 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
18–28 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 B 25 Beiley.
|
B 25 Beiley |
Catalina 25 |
Com-Pac 25 |
Hunter 25.5 |
Olson 25 |
Pearson 25 |
| Dimensions |
| LOA |
25.0 |
25.0 |
25.0 |
25.0 |
25.0 |
25.0 |
| LWL |
21.3 |
21.5 |
21.5 |
— |
21.2 |
21.4 |
| Beam |
8.3 |
8.8 |
8.8 |
— |
9.0 |
8.0 |
| Displacement |
2 |
4 |
4 |
— |
2 |
3 |
| Ballast |
800 |
1 |
1 |
— |
1 |
1 |
| Sail Area |
273 |
254 |
248 |
— |
294 |
257 |
| Performance |
| PHRF |
— |
223 |
222 |
206 |
162 |
216 |
| SA/Disp |
27.6 |
16.1 |
15.2 |
— |
23.2 |
17.1 |
| Bal/Disp |
40.0 |
37.5 |
38.1 |
— |
44.8 |
33.3 |
| Comfort |
8.2 |
15.2 |
15.9 |
— |
10.8 |
16.1 |
| Capsize |
2.65 |
2.21 |
2.17 |
— |
2.53 |
2.06 |
| Hull Speed |
6.2 |
6.2 |
6.2 |
— |
6.2 |
6.2 |