The Beneteau Oceanis 381 Sailboat
Specs & Key Performance Indicators
The Beneteau Oceanis 381, a light displacement sloop, was designed by Berret-Racoupeau Yacht Design and built in France by Beneteau.
The Beneteau Oceanis 381
Published Specification for the Beneteau Oceanis 381
Underwater Profile: Bulb fin keel & spade rudder
Hull Material: GRP (Fibreglass)
Length Overall: 38'7" (11.8m)
Waterline Length: 32'10" (10.0m)
Beam: 12'11" (3.9m)
Draft: 5'4" (1.6m)
Rig Type: Masthead sloop
Displacement: 14,991lb (6,800kg)
Designer: Berret-Racoupeau Yacht Design
Builder: Beneteau (France)
Year First Built: 1996
Published Design Ratios for the Beneteau Oceanis 381
1. Sail Area/Displacement Ratio: 15.5
- 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: 31.6
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 189
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 22.2
- 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: 2.1
- Under 2.0 (the lower the better): Better suited for ocean passages
- Over 2.0: Less suited for ocean passages
read more about these Key Performance Indicators...
Summary Analysis of the Design Ratios for the Beneteau Oceanis 381
1. A Sail Area/Displacement Ratio of 15.5 suggests that the Beneteau Oceanis 381 will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.
2. A Ballast/Displacement Ratio of 31.6 would usually mean that the Beneteau Oceanis 381 would have a tendency to heel uncomfortably in a gust, and need to be reefed early to keep her sailing upright in a moderate breeze.
However, as she has much of her ballast concentrated in a bulb at the foot of her keel, she's likely to be considerably stiffer than her published Ballast/Displacement Ratio might suggest.
3. A Displacement/Length Ratio of 189, tells us the Beneteau Oceanis 381 is clearly a light displacement sailboat. If she's loaded with too much heavy cruising gear her performance will suffer to a degree.
4. Ted Brewer's Comfort Ratio of 22.2 suggests that crew comfort of a Beneteau Oceanis 381 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 of 2.1 tells us that a Beneteau Oceanis 381 would not be as good a choice of sailboat for ocean passage-making, owing to the increased risk of capsize in strong winds and heavy seas when compared to a sailboat with a CSF of less than 2.0.
Other sailboats in the Beneteau 'Oceanis' product range:
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