The Inferno 37 is with acceptable motion comfort for coastal passages.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
7.5 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 31.5′, the Inferno 37 tops out around 7.5 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √31.5′ LWL = 7.5 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Ballast / Displacement
62.1%
Race-oriented ballast ratio — very stiff and powerful.
Displacement / Length
189
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
24.1
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.91
Below the 2.0 offshore threshold — acceptable for ocean passages.
Hull Speed
7.5kts
Pounds/Inch Immersion
1lbs
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
24.1
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
1.91
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 Inferno 37 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Elan 40
Dehler 39
Etap 39S
How It Compares
Side-by-side with the boats most often cross-shopped against the Inferno 37.
| Inferno 37 | Dehler 39 | Elan 40 | Etap 39S | Grand Soleil 38 Finot | Sun Odyssey 39I Jeanneau | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 39.0 | 39.0 | 39.0 | 39.0 | 39.0 | 38.9 |
| LWL | 31.5 | 35.1 | 33.6 | 33.5 | 31.2 | 35.2 |
| Beam | 11.3 | 12.5 | 12.6 | 12.6 | 12.3 | 12.7 |
| Displacement | 13 | 15 | 15 | 14 | 14 | 16 |
| Ballast | 8 | 6 | 5 | 4 | 5 | 5 |
| Sail Area | — | 1,032 | 780 | 649 | 656 | 670 |
| Performance | ||||||
| PHRF | — | 75 | 66 | 90 | — | — |
| SA/Disp | — | 26.7 | 19.8 | 17.1 | 17.3 | 16.8 |
| Bal/Disp | 62.1 | 42.1 | 35.5 | 33.1 | 35.3 | 31.1 |
| Comfort | 24.1 | 22.7 | 23.9 | 22.5 | 24.5 | 23.3 |
| Capsize | 1.91 | 2.02 | 2.00 | 2.05 | 1.99 | 2.02 |
| Hull Speed | 7.5 | 7.9 | 7.8 | 7.8 | 7.5 | 7.9 |