The Dufour 460 Grand Large Sailboat
Specs & Key Performance Indicators

Published Specification for the Dufour 460 Grand Large

Underwater Profile: Bulb fin keel & spade rudder

Hull Material: GRP (Fibreglass)

Length Overall: 46'5" (14.2m)

Waterline Length: 41'2" (12.5m)

Beam: 14'9" (4.5m)

Draft: 7'3" (2.2m)

Rig Type: Fractional sloop

Displacement: 23,721lb (10,760kg)

Designer: Umberto Felci

Builder: Dufour Yachts (France)

Year First Built: 2016

Published Design Ratios for the Dufour 460 Grand Large

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: 26.5

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

3. Displacement/Length Ratio: 152

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

4. Comfort Ratio: 23.8

• 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 Dufour 460 Grand Large

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1. A Sail Area/Displacement Ratio of 20.9 suggests that, in the right hands, the Dufour 460 Grand Large will have enough performance to leave most other sailboats of similar waterline length well astern. 

2. A Ballast/Displacement Ratio of 26.5 would usually mean that the Dufour 460 Grand Large 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 152 tells us the Dufour 460 Grand Large 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 23.8 suggests that crew comfort of a Dufour 460 Grand Large 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 20.1 tells us that a Dufour 460 Grand Large 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.