The Mamba 29 is well-powered with enough sail area to move in light air, 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 23.3′, the Mamba 29 tops out around 6.5 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √23.3′ LWL = 6.5 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
20.2
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Comfort Ratio
21.5
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
2.01
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
800lbs
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
21.5
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
2.01
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 Mamba 29 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
J/28
171s/nm
Ericson 28
180s/nm
Pearson 28 2
192s/nm
Ontario 28
195s/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° |
2.8 |
3.6 |
4.0 |
4.1 |
| Close Reach60° |
3.4 |
4.3 |
4.8 |
5.0 |
| Beam Reach90° |
4.2 |
5.3 |
5.9 |
6.1 |
| Broad Reach120–135° |
3.9 |
4.9 |
5.4 |
5.7 |
| Run150–180° |
3.1 |
3.9 |
4.4 |
4.5 |
These are simplified estimates based on hull speed (6.5 kts),
SA/D (20.2), 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 Mamba 29 — 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 Mamba 29.
|
Mamba 29 |
Cc 29 2 |
Ericson 28 |
J/28 |
Ontario 28 |
Pearson 28 2 |
| Dimensions |
| LOA |
28.5 |
28.5 |
28.5 |
28.5 |
28.6 |
28.5 |
| LWL |
23.3 |
22.3 |
24.2 |
23.5 |
22.0 |
24.4 |
| Beam |
9.6 |
9.4 |
10.5 |
10.7 |
10.0 |
9.8 |
| Displacement |
7 |
6 |
7 |
6 |
6 |
7 |
| Ballast |
3 |
2 |
3 |
2 |
2 |
2 |
| Sail Area |
463 |
396 |
422 |
390 |
400 |
384 |
| Performance |
| PHRF |
— |
— |
180 |
171 |
195 |
192 |
| SA/Disp |
20.2 |
17.9 |
17.7 |
19.6 |
17.9 |
16.8 |
| Bal/Disp |
— |
40.3 |
40.0 |
38.2 |
42.7 |
36.4 |
| Comfort |
21.5 |
21.6 |
19.9 |
24.6 |
20.4 |
20.1 |
| Capsize |
2.01 |
2.00 |
2.15 |
1.71 |
2.11 |
2.06 |
| Hull Speed |
6.5 |
6.3 |
6.6 |
7.4 |
6.3 |
6.6 |