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Sailboat specifications and datasheets

Dufour 30 Classic deep draft

The Dufour 30 Classic, here in "deep draft" version, is a 29’5” monohull sailboat designed by J&J Design. She was built by Dufour (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1996 and 2003 with 479 hulls completed.
Dufour 30 Classic Dufour 30 Classic sailplanDufour 30 Classic layoutDufour 30 Classic sailingDufour 30 Classic accommodations
Dufour 30 Classic's   Main Features
Model Dufour 30 Classic
Version Deep draft
Type of hull Monohull
Category Cruising sailboat
Shipyard
Designer J&J Design
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich balsa / fiberglass / polyester
First built hull 1996
Last built hull 2003
Number of hulls built 479
Appendages Keel :
L-shaped keel (with 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 30 Classic's   Main dimensions
Hull length 29’ 5”
Waterline length 26’ 4”
Beam (width) 9’ 10”
Draft 4’ 11”
Mast height from DWL 41’
Light displacement 6504 lbs
Ballast weight 2094 lbs
Ballast type Cast iron
French customs tonnage 7.93 Tx
Dufour 30 Classic's   Rig and sails
Upwind sail area 436 sq.ft
Downwind sail area 747 sq.ft
Mainsail area 230 sq.ft
Genoa area 206 sq.ft
Symetric spinnaker area 517 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 Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 36’ 6”
JiFore triangle base (from mast foot to bottom of forestay) 11’ 7”
PiMainsail hoist measurement (from tack to head) 33’
EiMainsail foot measurement (from tack to clew) 12’ 4”
Dufour 30 Classic's   Performances
HN (French rating) 16.5
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.
19.69
Downwind 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.
33.74
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.
161
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.
32 %
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.
6.88 knots
Dufour 30 Classic's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine (min/max) 10 HP / 20 HP
Fuel type Diesel
Fuel tank capacity 21.1 gal
Dufour 30 Classic's   Accommodation
Cabin(s) 1
Berth(s) (min/max) 4 / 6
Head(s) 1
Fresh water tank capacity 44.9 gal
Fridge/ice-box capacity 15.9 gal
Maximum headroom 5’ 8”
Galley headroom 5’ 8”
Head headroom 5’ 7”
Dufour 30 Classic's   Saloon
Maximum headroom 5’ 8”
Saloon table length 3’ 11”
Saloon table width 2’ 4”
Berth length 6’ 7”
Berth width (head/feet) 1’ 11”
Dufour 30 Classic's   Fore cabin
Maximum headroom 2’ 5”
Berth length 5’ 5”
Berth width (head/feet) 4’ 11”
1’ 4”
Dufour 30 Classic's   Aft cabin
Maximum headroom 5’ 7”
Berth length 6’ 10”
Berth width (head/feet) 4’ 11”
3’ 5”

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