The Hallberg-Rassy 37 Sailboat
Specs & Key Performance Indicators

The Hallberg-Rassy 37, a centre cockpit sloop, was designed by German Frers and built in Sweden by Hallberg-Rassy.

The Hallberg-Rassy 37

Published Specification for the Hallberg-Rassy 37

Underwater Profile: Bulb fin keel & spade rudder

Hull Material: GRP (Fibreglass)

Length Overall: 37'2" (11.3m)

Waterline Length: 33'6" (10.2m)

Beam: 11'8" (3.6m)

Draft: 6'3" (1.9m)

Rig Type: Masthead sloop

Displacement: 16,534lb (7,500kg)

Designer: German Frers

Builder: Hallberg-Rassy (Sweden)

Year First Built: 2003

Year Last Built: 2012

Number Built: 200

Published Design Ratios for the Hallberg-Rassy 37

1. Sail Area/Displacement Ratio: 18.4

Less than 16 would be considered under-powered;
16 to 20 would indicate reasonably good performance;
Over 20 suggests relatively high performance.

2. Ballast/Displacement Ratio: 42.7

Under 40: less stiff, less powerful
Over 40: stiffer, more powerful

3. Displacement/Length Ratio: 197

Under 100: Ultralight
100 to 200: Light
200 to 275: Moderate
275 to 350: Heavy
Over 350: Ultraheavy

4. Comfort Ratio: 28.1

Under 20 indicates a lightweight racing boat
20 to 30 indicates a coastal cruiser
30 to 40 indicates a moderate offshore cruising boat
40 to 50 indicates a heavy offshore boat
Over 50 indicates an extremely heavy offshore boat

5. Capsize Screening Formula: 1.8

Under 2.0 (the lower the better): Better suited for ocean passages
Over 2.0: Less suited for ocean passages

Summary Analysis of the Design Ratios for the Hallberg-Rassy 37

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1. A Sail Area/Displacement Ratio of 18.4 suggests that the Hallberg-Rassy 37 will, in the right conditions, approach her maximum hull speed readily and satisfy the sailing performance expectations of most cruising sailors.

2. A Ballast/Displacement Ratio of 42.7 means that the Hallberg-Rassy 37 will stand up well to her canvas in a blow, helping her to power through the waves.

3. A Displacement/Length Ratio of 192, tells us the Hallberg-Rassy 37 is clearly a light-to-moderate displacement sailboat. If she's loaded with too much heavy cruising gear and equipment her performance will suffer to a degree.

4. Ted Brewer's Comfort Ratio of 28.1 suggests that crew comfort of a Hallberg-Rassy 37 in a seaway is similar to what you would associate with the motion of a coastal cruiser with moderate stability, which is not encouraging news for anyone prone to seasickness.

5. The Capsize Screening Formula (CSF) of 1.8 indicates that a Hallberg-Rassy 37 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.