Detailed sailboat specifications and datasheets since 2015
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Dufour 412 Grand Large

Sailboat specifications

The Dufour 412 Grand Large is a 39’4” (11.98m) cruising sailboat designed by Felci Yachts (Italy). She is built since 2016 by Dufour (France).

Dufour 412 Grand Large's main features

Dufour 412 Grand Large
Hull type
Cruising sailboat
Sailboat builder
Sailboat designer
Sailboat range
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich PVC fiberglass polyester (injection molding process)
First built hull
Last built hull
Still in production
Keel : L-shaped keel (with bulb)
Twin helm wheels
Single spade rudder
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
Standard public price ex. VAT (indicative only)
162 000

Dufour 412 Grand Large's main dimensions

Overall length
40’ 6”12.35 m
Hull length
39’ 4”11.98 m
Waterline length
36’ 7”11.15 m
Beam (width)
13’ 10”4.2 m
6’ 11”2.1 m
Light displacement (MLC)
19709 lb8940 kg
Ballast weight
5732 lb2600 kg
Ballast type
Cast iron

Dufour 412 Grand Large's rig and sails

Upwind sail area
764 ft²71 m²
Mainsail area
409 ft²38 m²
Genoa area
355 ft²33 m²
 iFore triangle height (from mast foot to fore stay top attachment)
47’ 7”14.5 m
 iFore triangle base (from mast foot to bottom of forestay)
14’ 1”4.3 m
 iMainsail hoist measurement (from tack to head)
45’ 8”13.92 m
 iMainsail foot measurement (from tack to clew)
15’ 5”4.7 m
Rigging type
Sloop Marconi 9/10
Mast configuration
Deck stepped mast
Rotating spars
Number of levels of spreaders
Spreaders angle
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire continuous

Dufour 412 Grand Large'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.
177 ft²/T16.48 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.
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.
29 %
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.
8.10 knots

Dufour 412 Grand Large's auxiliary engine

1 inboard engine
Engine(s) power
40 HP
Fuel type
Fuel tank capacity
52.8 gal200 liters

Dufour 412 Grand Large's accommodations and layout

Closing aft cockpit with opening system
Cabin(s) (min./max.)
2 / 3
Berth(s) (min./max.)
4 / 8
Head(s) (min./max.)
1 / 2
Freshwater tank capacity
100.4 gal380 liters

Dufour 412 Grand Large's fore cabin

Berth length
6’ 7”2 m
Berth width
4’ 7”1.4 m

Dufour 412 Grand Large's aft cabin

Berth length
6’ 7”2 m
Berth width
5’ 2”1.6 m
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