Dufour 40E Performance

Sailboat specifications

The Dufour 40E Performance is a 39’4” (11.99m) cruiser-racer sailboat designed by Felci Yachts (Italy). She was built between 2010 and 2017 by Dufour (France).

Dufour 40E Performance's main features

Model: Dufour 40E Performance
Hull type: Monohull
Category: Cruiser-racer sailboat
Sailboat builder: Dufour
Sailboat designer: Felci Yachts
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin bottom, sandwich sides and deck: PVC fiberglass polyester vacuum bagged
- Deck: Sandwich Nomex fiberglass polyester (injection molding process)
First built hull: 2010
Last built hull: 2017
Appendages: Keel : L-shaped keel (with bulb)
Helm: Twin helm wheels
Rudder: Single spade rudder
Unsinkable: No
Trailerable: No
EC design category iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions) A: Wind < force 9, Waves < 10m B: Wind < force 8, Waves < 8m C: Wind < force 6, Waves < 4m D: Wind < force 4, Waves < 0,5m: A
Standard public price ex. VAT (indicative only): About
171 000 €
(2016)

Dufour 40E Performance's main dimensions

Overall length: 40’ 6”12.35 m
Hull length: 39’ 4”11.99 m
Waterline length: 35’ 4”10.76 m
Beam (width): 12’ 10”3.89 m
Draft: 6’ 11”2.1 m
Mast height from D_WL: 58’ 7”17.86 m
Light displacement (M_LC): 18794 lb8525 kg
Ballast weight: 5260 lb2386 kg

Dufour 40E Performance's rig and sails

Upwind sail area: 950 ft²88.3 m²
Downwind sail area: 1733 ft²161 m²
Mainsail area: 484 ft²45 m²
Genoa area: 466 ft²43.3 m²
Symmetric spinnaker area: 1249 ft²116 m²
I iFore triangle height (from mast foot to fore stay top attachment): 48’ 1”14.65 m
J iFore triangle base (from mast foot to bottom of forestay): 13’ 10”4.2 m
P iMainsail hoist measurement (from tack to head): 47’ 1”14.35 m
E iMainsail foot measurement (from tack to clew): 17’ 11”5.46 m
Rigging type: Sloop Marconi 9/10
Mast configuration: Keel stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: Swept-back
Spars construction: Aluminum spars
Standing rigging: Dyform discontinuous

Dufour 40E Performance's performances

Upwind sail area to displacement iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds. The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size. Upwind: under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 25 it indicates a fast sailboat.: 228 ft²/T21.16 m²/T
Downwind sail area to displacement iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds. The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size.: 415 ft²/T38.58 m²/T
Displacement-length ratio (DLR) iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet). The DLR can be used to compare the relative mass of different sailboats no matter what their length: a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat.: 194
Ballast ratio iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared. The higher the ballast ratio is, the greater is the stability.: 28 %
Critical hull speed iAs a ship moves in the water, it creates standing waves that oppose its movement. This effect increases dramatically the resistance when the boat reaches a speed-length ratio (speed-length ratio is the ratio between the speed in knots and the square root of the waterline length in feet) of about 1.2 (corresponding to a Froude Number of 0.35) . This very sharp rise in resistance, between speed-length ratio of 1.2 to 1.5, is insurmountable for heavy sailboats and so becomes an apparent barrier. This leads to the concept of "hull speed". The hull speed is obtained by multiplying the square root of the waterline length (in feet) by 1.34.: 7.96 knots