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Dufour 520 Grand Large is a Offshore cruising sailboat built by Dufour and designed by Felci Yachts. Her first hull was built in 2017 with an overall lengh of 15.2 m or 49.11 ft long and a Deck stepped mast mast configuration.

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DUFOUR 520 GRAND LARGE Sailboat Specifications​


Overall Length (LOA) m / ft15.2 m / 49.11 ft
Builder(s)Dufour Yachts
Designer(s)Felci Yachts
SeriesGrand Large
categoryOffshore cruising sailboat
Hull TypeMonohull
First Hull Built2017
Last Hull BuiltStill in production
AppendagesKeel L-shaped keel (with bulb)
HelmTwin helm wheels
RudderSingle spade rudder
CockpitClosing aft cockpit with opening system
Rigging TypeSloop Marconi 9/10
Mast LayoutDeck stepped mast
Freshwater Tank Capacity lt/gal720 L / 190.2 gal
Ballast Ratio0.27


Overall Length (LOA) 15.2 m / 49.11 ft
Hull Length14.75 m / 48.5 ft
Waterline Length (LWL)13.67 m / 44.10 ft
Beam (width)4.8 m / 15.8 ft
Draft2.3 m / 7.6 ft
Light Displacement (MLC) 15245 kg / 33609 lb
Maximum Displacement15245 kg / 33609 lb
Ballast Weight4072 kg / 8977 lb


Critical Hull Speed8.97 knots
Capsize Screening Formula (CSF)1.96
Comfort Ratio28.51
Displacement-Length Ratio (DLR)169
Ballast Ratio0.27
Sail Area to Displacement16.72
Upwind Sail Area to Displacement16.39 m²/T / 176 ft²/T
Downwind Sail Area to Displacement28.11 m²/T / 303 ft²/T

Above Deck

Mast LayoutDeck stepped mast
Rotating SparsNo
Number of Levels of Spreaders2
Spreaders AngleSwept-back
Spars ConstructionAluminum spars (carbon fiber spars as an option)
Reported Sail Area100.71 m² / 1084.00 ft²
Upwind Sail Area100.8 m² / 1085 ft²
Downwind Sail Area172.8 m² / 1860 ft²
Mainsail Area52.8 m² / 568 ft²
Genoa Area48 m² / 517 ft²

Engine Room

Engine(s)1 inboard engine
Engine(s) Power75 HP
Fuel typeDiesel
Fuel Tank Capacity450 L / 118.9 gal