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Performance & Speed

Deltania 28 S Performance

How the Deltania 28 S performs on the water — racing handicap, speed, sail-carrying power, stability and comfort.

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The Deltania 28 S 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.

6.7 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.

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
20.0
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Ballast / Displacement
36.1%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
174
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
17.9
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.08
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Hull Speed
6.7kts
Pounds/Inch Immersion
5lbs
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
17.9
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
2.08
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 Deltania 28 S sits on the PHRF handicap spectrum — lower numbers mean faster boats.

Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Etap 30 186s/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 5.4 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 (6.7 kts), SA/D (20.0), 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 Deltania 28 S — 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 Deltania 28 S.

Deltania 28 S Com-Pac 27/2 Etap 28S Etap 30 Etap 30Cq Sun Dream 28 Jeanneau
Dimensions
LOA 29.5 29.6 29.5 29.6 29.5 29.5
LWL — 25.0 27.7 25.1 27.7 24.6
Beam 9.5 10.0 11.0 10.3 11.0 10.6
Displacement 6 7 8 7 8 5
Ballast 2 2 2 3 2 2
Sail Area 419 365 439 403 439 370
Performance
PHRF — — — 186 — —
SA/Disp 20.0 15.4 17.4 16.3 17.4 18.1
Bal/Disp 36.1 39.2 31.6 38.2 31.6 40.9
Comfort 17.9 20.1 18.3 20.7 18.3 15.2
Capsize 2.08 2.06 2.19 2.07 2.19 2.34
Hull Speed 6.7 6.7 7.1 6.7 7.1 6.6