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The Dufour 455, a light displacement fractional sloop, was designed by Umberto Felci and built in France by Dufour Yachts.
Underwater Profile: Bulb fin keel & spade rudder
Hull Material: GRP (Fibreglass)
Length Overall: 45'2" (13.8m)
Waterline Length: 39'1" (11.9m)
Beam: 14'2" (4.3m)
Draft: 6'7" (2.0m)
Rig Type: Fractional sloop
Displacement: 22,985lb (10,426kg)
Designer: Umberto Felci
Builder: Dufour Yachts (France)
Year First Built: 2006
1. Sail Area/Displacement Ratio: 16.9
2. Ballast/Displacement Ratio: 28.8
3. Displacement/Length Ratio: 172
4. Comfort Ratio: 25.6
5. Capsize Screening Formula: 2.0
1. A Sail Area/Displacement Ratio of 16.9 suggests that the Dufour 455 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 28.8 would usually mean that the Dufour 455 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 172, tells us the Dufour 455 is 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 25.6 suggests that crew comfort of a Dufour 455 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 1.9 indicates that a Dufour 455 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.
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Jan 11, 23 09:07 AM