The Yankee 30 Mki is moderately powered for comfortable coastal cruising, with acceptable motion comfort for coastal passages.
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 23.0′, the Yankee 30 Mki tops out around 6.4 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √23.0′ LWL = 6.4 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
PHRF Rating
210s/nm
Heavy or slow cruiser — all about the journey, not the elapsed time.
SA / Displacement
16.3
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
47.5%
Race-oriented ballast ratio — very stiff and powerful.
Displacement / Length
319
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
28.7
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.75
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
740lbs
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
28.7
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.75
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 Yankee 30 Mki sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Columbia 30
180s/nm
Yankee 30 Mki
210s/nm
Heavy or slow cruiser — all about the journey, not the elapsed time.
Contest 30
224s/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° |
2.5 |
3.2 |
3.5 |
3.7 |
| Close Reach60° |
3.0 |
3.8 |
4.3 |
4.5 |
| Beam Reach90° |
3.7 |
4.7 |
5.3 |
5.5 |
| Broad Reach120–135° |
3.4 |
4.3 |
4.9 |
5.1 |
| Run150–180° |
2.8 |
3.5 |
3.9 |
4.1 |
These are simplified estimates based on hull speed (6.4 kts),
SA/D (16.3), 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 Yankee 30 Mki — 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 Yankee 30 Mki.
|
Yankee 30 Mki |
Cal 3 30 |
Columbia 30 |
Contest 30 |
Irwin 30 Competition |
Newport 30 2 |
| Dimensions |
| LOA |
30.0 |
30.1 |
30.0 |
30.0 |
30.0 |
30.0 |
| LWL |
23.0 |
26.3 |
26.5 |
24.9 |
26.9 |
26.5 |
| Beam |
9.0 |
10.2 |
9.5 |
9.0 |
10.2 |
10.7 |
| Displacement |
8 |
10 |
10 |
8 |
10 |
8 |
| Ballast |
4 |
5 |
— |
4 |
4 |
2 |
| Sail Area |
430 |
474 |
515 |
362 |
474 |
414 |
| Performance |
| PHRF |
210 |
— |
180 |
224 |
— |
— |
| SA/Disp |
16.3 |
15.9 |
16.9 |
13.6 |
16.4 |
16.6 |
| Bal/Disp |
47.5 |
47.6 |
— |
45.4 |
46.0 |
— |
| Comfort |
28.7 |
26.9 |
30.2 |
27.6 |
25.3 |
19.2 |
| Capsize |
1.75 |
1.86 |
1.72 |
1.75 |
1.89 |
2.14 |
| Hull Speed |
6.4 |
6.9 |
6.9 |
6.7 |
7.0 |
6.9 |