The Dufour 40e, a light-displacement fractional sloop, was designed by Umberto Felci and Patrick Roséo and built in France by Dufour Yachts.
Underwater Profile: Bulb fin keel and spade rudder
Hull Material: GRP
Length Overall: 40'5" (12.4m)
Waterline Length: 35'3" (10.8m)
Beam: 12'9" (3.9m)
Draft: 6'10" (2.1m)
Rig Type: Fractional sloop
Displacement: 16,283lb (7,386kg)
Designer: Umberto Felci and Patrick Roséo
Builder: Dufour Yachts (France)
Year First Built: 2002
Owners Association: Dufour Owners Association
1. Sail Area/Displacement Ratio: 23.8
2. Ballast/Displacement Ratio: 30.0
3. Displacement/Length Ratio: 178
4. Comfort Ratio: 24.7
5. Capsize Screening Formula: 2.0
1. A Sail Area/Displacement Ratio of 23.8 suggests that, in the right hands, the Dufour 40e will have enough performance to leave most other sailboats of similar waterline length well astern.
2. A Ballast/Displacement Ratio of 30.0 would usually mean that the Dufour 40e would have a tendency to heel excessively 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 the keel, she's likely to be considerably stiffer than her published Ballast/Displacement Ratio might suggest.
3. A Displacement/Length Ratio of 178, tells us the Dufour 40e is clearly a light displacement sailboat. If she's loaded with too much heavy cruising gear her performance will suffer dramatically.
4. Ted Brewer's Comfort Ratio of 24.7 suggests that crew comfort of a Dufour 40e 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 2.0 is on the cusp of suitability for an ocean passage, so venture offshore with caution.
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