The Dufour 29 Sailboat
Specs & key Performance Indicators
The Dufour 29, a masthead sloop, was designed by Michel Dufour and built in France by Dufour Yachts.
A Dufour 29 sailing slowly in very light winds under her spinnaker
Published Specification for the Dufour 29
Underwater Configuration: Fin with skeg-hung rudder
Hull Material: GRP (fibreglass)
Length Overall: 29' 4" / 8.94m
Waterline Length: 25' 1" / 7.64m
Beam: 9' 8" / 2.95m
Draft: 5' 3" / 1.60m
Rig Type: Masthead Sloop
Displacement: 7,250lb / 3,289kg
Designer: Michel Dufour
Builder: Dufour (France)
Year First Built: 1975
Year Last Built: 1984
Owners Association: Dufour Owners Association
Published Design Ratios for the Dufour 29
1. Sail Area/Displacement Ratio: 15.6
- 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: 36.5
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 205
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 20.7
- 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 all-revealing numbers...
Summary Analysis of Published Design Ratios for the Dufour 29
1. A Sail Area/Displacement Ratio of just 15.6 suggests that she'll need a stiff breeze to get her going. In any other conditions, unless you've got plenty of time on your hands, motor-sailing will be the way to go.
2. A Ballast/Displacement Ratio of 36.5 means that a sailboat like the Dufour 29 (which doesn't have a stiffness-enhancing bulb keel), is likely to benefit from being reefed early to keep her sailing upright in a moderate breeze.
3. A Displacement/Length Ratio of 205, tells us she's a moderate displacement cruiser, which means she'll carry all your cruising gear without it having a dramatic effect on her performance. Most of today's sailboats intended for offshore cruising fall into this displacement category.
4. Ted Brewer's Comfort Ratio of 20.7 suggests that crew comfort in a seaway is similar to what you would associate with the motion of a coastal cruiser, which is not encouraging news for anyone prone to seasickness.
5. The Capsize Screening Formula (CSF) of 2.0 indicates that a Dufour 29 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 that is associated with sailboats with a CSF of 2.0 and above.
Other sailboats in the Dufour range include:
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