The Cr 490 Ds is moderately powered for comfortable coastal cruising, with a steady, comfortable ride offshore.
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 45.3′, the Cr 490 Ds tops out around 9.0 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √45.3′ LWL = 9.0 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
17.7
Moderate sail power — a capable coastal cruiser, not overpowered.
Displacement / Length
186
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
33.3
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.83
Below the 2.0 offshore threshold — acceptable for ocean passages.
SA/Disp (Calculated)
17.3
Computed from measured I/J/P/E rather than reported sail area.
Pounds/Inch Immersion
15lbs
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
33.3
Good offshore comfort — steady enough for multi-day passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.83
Below the 2.0 offshore threshold — acceptable for ocean passages.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
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° |
3.7 |
4.6 |
5.2 |
5.4 |
| Close Reach60° |
4.4 |
5.6 |
6.3 |
6.5 |
| Beam Reach90° |
5.4 |
6.9 |
7.7 |
8.3 |
| Broad Reach120–135° |
5.0 |
6.3 |
7.1 |
7.7 |
| Run150–180° |
4.0 |
5.1 |
5.7 |
5.9 |
These are simplified estimates based on hull speed (9.0 kts),
SA/D (17.7), 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 Cr 490 Ds — 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 Cr 490 Ds.
|
Cr 490 Ds |
Aura 51 |
Italia 1498 |
Moody 48 Ds |
Xc 50 |
Xp 50 |
| Dimensions |
| LOA |
50.9 |
51.0 |
50.8 |
50.6 |
51.2 |
51.1 |
| LWL |
45.3 |
— |
43.0 |
45.4 |
44.3 |
43.7 |
| Beam |
15.5 |
26.5 |
14.2 |
15.9 |
15.1 |
14.5 |
| Displacement |
38 |
39 |
22 |
46 |
35 |
29 |
| Ballast |
— |
— |
— |
— |
15 |
12 |
| Sail Area |
1,259 |
1 |
1 |
1 |
1 |
1 |
| Performance |
| SA/Disp |
17.7 |
22.8 |
29.3 |
17.5 |
20.3 |
27.4 |
| Bal/Disp |
— |
— |
— |
— |
44.9 |
41.2 |
| Comfort |
33.3 |
17.0 |
21.9 |
38.6 |
31.8 |
28.6 |
| Capsize |
1.83 |
3.11 |
2.03 |
1.77 |
1.84 |
1.87 |
| Hull Speed |
9.0 |
8.8 |
8.8 |
9.0 |
8.9 |
8.9 |