The Farr 30 Mumm 30 is aggressively canvassed for its weight, 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.
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 27.6′, the Farr 30 Mumm 30 tops out around 7.0 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √27.6′ LWL = 7.0 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
29.4
Performance-oriented — carries a lot of canvas for its weight.
Ballast / Displacement
43.8%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
97
Ultralight — responsive and fast, but carries less stores.
Comfort Ratio
11.3
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.44
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
996lbs
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
11.3
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
2.44
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 Farr 30 Mumm 30 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Noelex 30
119s/nm
Dehler 31
162s/nm
Catalina 309
167s/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° |
3.3 |
4.2 |
4.7 |
4.9 |
| Close Reach60° |
4.0 |
5.1 |
5.7 |
5.9 |
| Beam Reach90° |
4.9 |
6.2 |
6.9 |
7.5 |
| Broad Reach120–135° |
4.5 |
5.7 |
6.4 |
7.0 |
| Run150–180° |
3.6 |
4.6 |
5.1 |
5.4 |
These are simplified estimates based on hull speed (7.0 kts),
SA/D (29.4), 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 Farr 30 Mumm 30 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–5 kts
5–18 kts
18–28 kts
28+ kts
Ghosting
0–5 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
5–18 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
18–28 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 Farr 30 Mumm 30.
|
Farr 30 Mumm 30 |
Catalina 309 |
Dehler 31 |
F 31 Sport Cruiser |
Noelex 30 |
Parker 31 |
| Dimensions |
| LOA |
30.9 |
32.8 |
30.8 |
30.8 |
30.9 |
31.0 |
| LWL |
27.6 |
26.5 |
24.3 |
30.0 |
26.8 |
28.3 |
| Beam |
10.1 |
11.5 |
10.2 |
22.4 |
9.4 |
10.0 |
| Displacement |
4 |
9,800 |
7 |
3 |
4 |
7 |
| Ballast |
1 |
4,000 |
2 |
— |
1 |
2 |
| Sail Area |
504 |
452 |
443 |
599 |
410 |
448 |
| Performance |
| PHRF |
— |
167 |
162 |
— |
119 |
— |
| SA/Disp |
29.4 |
16.4 |
19.3 |
40.7 |
25.6 |
19.7 |
| Bal/Disp |
43.8 |
40.8 |
40.6 |
— |
31.4 |
— |
| Comfort |
11.3 |
20.5 |
18.9 |
— |
11.5 |
17.3 |
| Capsize |
2.44 |
2.15 |
2.12 |
— |
2.34 |
2.09 |
| Hull Speed |
7.0 |
6.9 |
6.6 |
— |
6.9 |
7.1 |