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Sailboat specifications and datasheets

Dufour 28 Mezzo fin keel

The Dufour 28 Mezzo, here in "fin keel" version, is a 28’8” monohull sailboat designed by Jacques Fauroux. She was built by Dufour (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1983 and 1988 with 140 hulls completed.
Dufour 28 Mezzo Dufour 28 Mezzo layoutDufour 28 Mezzo layoutDufour 28 Mezzo accommodations
Dufour 28 Mezzo's   Main Features
Model Dufour 28 Mezzo
Version Fin keel
Type of hull Monohull
Category Cruising sailboat
Shipyard
Designer Jacques Fauroux
Construction Hull and deck:
monolithic fiberglass / polyester
First built hull 1983
Last built hull 1988
Number of hulls built 140
Appendages Keel :
Fin without bulb
Helm 1 tiller
Rudder 1 spade rudder
Cockpit Closed aft cockpit
Unsinkable No
Trailerable No
French navigation category 2
Standard public price ex. VAT (indicative only) N/A
Dufour 28 Mezzo's   Main dimensions
Hull length 28’ 8”
Waterline length 23’ 7”
Beam (width) 10’ 5”
Draft 5’ 4”
Mast height from DWL 40’ 6”
Light displacement 5997 lbs
Ballast weight 2028 lbs
Ballast type Cast iron
French customs tonnage 6.80 Tx
Dufour 28 Mezzo's   Rig and sails
Upwind sail area 471 sq.ft
Mainsail area 166 sq.ft
Genoa area 306 sq.ft
Jib area 194 sq.ft
Rigging type Sloop Marconi masthead
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire continuous
Number of levels of spreaders 1
Spreaders angle 0 °
IiFore triangle height (from mast foot to fore stay attachment) 34’ 7”
JiFore triangle base (from mast foot to bottom of forestay) 11’ 6”
PiMainsail hoist measurement (from tack to head) 29’ 6”
EiMainsail foot measurement (from tack to clew) 10’
Dufour 28 Mezzo's   Performances
HN (French rating) 15.0
Upwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
22.48
Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. 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.
206
Ballast ratioiThe Ballast ratio is an indicator of the stability; it is obtained by dividing the boat's displacement by the weight of the ballast. Since the stability depends also of the hull shape and the position of the center of gravity, only boats with similar ballast arrangements and hull shape should be considered.
Higher the ballast ratio is, greater is the stability.
34 %
Wetted surface 179 sq.ft
Righting moment @ 1°iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after a rotational displacement. Its value corresponds to the torque needed to heel the boat for this angle.
Higher the righting moment is for an angle, greater is the stability at this angle.
399 lbs.ft
Maximum transverse section 10 sq.ft
Hull speediAs 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.
6.51 knots
Dufour 28 Mezzo's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine (min/max) 9 HP / 18 HP
Fuel type Diesel
Fuel tank capacity 13.2 gal
Dufour 28 Mezzo's   Accommodation
Cabin(s) 2
Berth(s) 5
Head(s) 1
Fresh water tank capacity 26.4 gal
Fridge/ice-box capacity 18.5 gal
Maximum headroom 6’
Head headroom 5’ 5”
Dufour 28 Mezzo's   Saloon
Maximum headroom 5’ 8”
Saloon table length 4’ 8”
Saloon table width (min/max) 2’ / 3’ 1”
Berth length 6’ 4”
Berth width 1’ 8”
Dufour 28 Mezzo's   Fore cabin
Maximum headroom 4’ 7”
Dufour 28 Mezzo's   Aft cabin
Maximum headroom 5’ 5”
Berth length 6’ 2”
Berth width (head/feet) 4’ 4”
2’ 6”

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