The Bristol 488 is moderately powered for comfortable coastal cruising, with a gentle bluewater motion.
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 37.3′, the Bristol 488 tops out around 8.2 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √37.3′ LWL = 8.2 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
15.3
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
43.3%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
299
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
42.4
Very comfortable in a seaway — a genuine bluewater motion.
Capsize Screening
1.62
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
11lbs
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
42.4
Very comfortable in a seaway — a genuine bluewater motion.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.62
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 Bristol 488 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Alden 48
86s/nm
Taswell 49
102s/nm
Hallberg Rassy 49
120s/nm
Hinckley 49
150s/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° |
3.1 |
3.9 |
4.4 |
4.6 |
| Close Reach60° |
3.7 |
4.7 |
5.3 |
5.5 |
| Beam Reach90° |
4.6 |
5.8 |
6.5 |
6.8 |
| Broad Reach120–135° |
4.2 |
5.4 |
6.0 |
6.3 |
| Run150–180° |
3.4 |
4.3 |
4.8 |
5.0 |
These are simplified estimates based on hull speed (8.2 kts),
SA/D (15.3), 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 Bristol 488 — 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 Bristol 488.
|
Bristol 488 |
Alden 48 |
Hallberg Rassy 49 |
Hinckley 49 |
Oyster 485 |
Taswell 49 |
| Dimensions |
| LOA |
49.0 |
48.8 |
49.1 |
49.0 |
48.5 |
48.8 |
| LWL |
37.3 |
37.1 |
41.0 |
40.4 |
37.5 |
41.9 |
| Beam |
13.2 |
13.5 |
14.5 |
13.4 |
14.0 |
15.0 |
| Displacement |
34 |
32 |
39 |
38 |
37 |
32 |
| Ballast |
15 |
13 |
17 |
8 |
13 |
13 |
| Sail Area |
1,011 |
— |
1,249 |
922 |
960 |
— |
| Performance |
| PHRF |
— |
86 |
120 |
150 |
— |
102 |
| SA/Disp |
15.3 |
— |
17.3 |
13.1 |
13.8 |
— |
| Bal/Disp |
43.3 |
40.6 |
45.1 |
21.1 |
— |
40.0 |
| Comfort |
42.4 |
38.1 |
40.1 |
43.0 |
42.3 |
— |
| Capsize |
1.62 |
1.70 |
1.70 |
1.60 |
1.68 |
— |
| Hull Speed |
8.2 |
8.2 |
8.6 |
8.5 |
8.2 |
— |