The Beneteau Oceanis 50 Sailboat
Specs & Key Performance Indicators
The Beneteau Oceanis 50, a light displacement fractional sloop, was designed by Berret Racoupeau and built in France by Beneteau.
A Beneteau Oceanis 50
Published Specification for the Beneteau Oceanis 50
Hull Type: Bulb fin keel & spade rudder
Hull Material: GRP (Fibreglass)
Length Overall: 49'6" (15.1m)
Waterline Length: 43'8" (13.3m)
Beam: 14'9" (4.5m)
Draft: 5'7" (1.7m)
Rig Type: Fractional Sloop
Displacement: 27,454lb (12,453kg)
Designer: Berret Racoupeau
Builder: Beneteau (France)
Year First Built: 2010
Published Design Ratios for the Beneteau Oceanis 50
1. Sail Area/Displacement Ratio: 20.9
- 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: 34.5
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 148
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 25.9
- 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: 2.0
- 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 50
1. A Sail Area/Displacement Ratio of 20.9 suggests that, in the right hands, the Beneteau Oceanis 50 will have enough performance to leave most other sailboats of similar waterline length well astern.
2. A Ballast/Displacement Ratio of 34.5 would usually mean that the Beneteau Oceanis 50 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 148, tells us the Beneteau Oceanis 50 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 25.9 suggests that crew comfort of a Beneteau Oceanis 50 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 2.0 indicates that a Oceanis 50 would not be the wisest choice of sailboat for ocean passage-making owing to the lower resistance to capsize in strong winds and heavy seas associated with sailboats with a CSF of 2.0 and above.
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