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Performance & Speed

Sea Pearl 21 Tri Performance

How the Sea Pearl 21 Tri performs on the water — racing handicap, speed, sail-carrying power, stability and comfort.

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The Sea Pearl 21 Tri is aggressively canvassed for its weight.

Hull Speed

The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.

5.8 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length. With a waterline of 19.0′, the Sea Pearl 21 Tri tops out around 5.8 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √19.0′ LWL = 5.8 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
27.5
Performance-oriented — carries a lot of canvas for its weight.
Hull Speed
5.8kts

PHRF Fleet Position

Where the Sea Pearl 21 Tri sits on the PHRF handicap spectrum — lower numbers mean faster boats.

Cruiser 150–210
Heavy Cruiser 210–300
Hunter 212 216s/nm
Venture 21 252s/nm
Macgregor 21 263s/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° 2.7 3.5 3.9 4.0
Close Reach60° 3.3 4.2 4.7 4.9
Beam Reach90° 4.1 5.1 5.7 5.8
Broad Reach120–135° 3.7 4.7 5.3 5.5
Run150–180° 3.0 3.8 4.2 4.4
These are simplified estimates based on hull speed (5.8 kts), SA/D (27.5), 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 Sea Pearl 21 Tri — based on sail area, ballast, and displacement characteristics.

Ghost
Sweet Spot
Reef
Heavy
0–5 kts 5–16 kts 16–24 kts 24+ kts
Ghosting
0–5 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
5–16 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
16–24 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
24+ 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 Sea Pearl 21 Tri.

Sea Pearl 21 Tri Hunter 212 Macgregor 21 Nimble 20 Sea Pearl 21 Venture 21
Dimensions
LOA 21.0 21.0 21.0 20.9 21.0 21.0
LWL 19.0 18.0 18.5 19.8 19.0 18.5
Beam 14.0 9.2 6.8 7.8 5.5 6.8
Displacement 950 1 1 1 600 1
Ballast — 140 400 400 — 400
Sail Area 166 202 — 207 136 —
Performance
PHRF — 216 263 — — 252
SA/Disp 27.5 21.9 — 22.0 30.6 —
Bal/Disp — 7.8 34.0 21.6 — 26.7
Comfort — 7.7 — 9.3 4.9 —
Capsize — 3.02 — 2.53 2.61 —
Hull Speed — 5.7 — 6.0 5.8 —