The Dean 5000 is well-powered with enough sail area to move in light air, 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 49.7′, the Dean 5000 tops out around 9.5 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √49.7′ LWL = 9.4 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
21.1
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Displacement / Length
144
Ultralight — responsive and fast, but carries less stores.
Comfort Ratio
15.7
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
3.08
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
28lbs
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
15.7
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
3.08
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 Dean 5000 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Moorings 505
86s/nm
Moorings 500
87s/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° |
4.2 |
5.3 |
5.9 |
6.2 |
| Close Reach60° |
5.1 |
6.4 |
7.2 |
7.5 |
| Beam Reach90° |
6.2 |
7.9 |
8.8 |
9.6 |
| Broad Reach120–135° |
5.8 |
7.3 |
8.1 |
8.8 |
| Run150–180° |
4.6 |
5.8 |
6.5 |
6.8 |
These are simplified estimates based on hull speed (9.5 kts),
SA/D (21.1), 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 Dean 5000 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–6 kts
6–18 kts
18–26 kts
26+ kts
Ghosting
0–6 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
6–18 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
18–26 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
26+ 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 Dean 5000.
|
Dean 5000 |
Balance 502 |
Excess 13 |
Moorings 500 |
Moorings 505 |
| Dimensions |
| LOA |
50.5 |
50.0 |
50.2 |
50.4 |
50.6 |
| LWL |
49.7 |
50.0 |
42.6 |
44.5 |
43.2 |
| Beam |
26.3 |
25.9 |
23.8 |
15.6 |
15.8 |
| Displacement |
39 |
28 |
23 |
28 |
27 |
| Ballast |
— |
— |
— |
10 |
9 |
| Sail Area |
1 |
1 |
1 |
1 |
1 |
| Performance |
| PHRF |
— |
— |
— |
87 |
86 |
| SA/Disp |
21.1 |
26.7 |
24.3 |
17.5 |
20.7 |
| Bal/Disp |
— |
— |
— |
— |
34.0 |
| Comfort |
15.7 |
— |
— |
24.7 |
24.1 |
| Capsize |
3.08 |
— |
— |
2.04 |
2.09 |
| Hull Speed |
9.5 |
— |
— |
8.9 |
8.8 |