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Sailboat specifications and datasheets

Dufour 3800 deep draft

The Dufour 3800, here in "deep draft" version, is a 30’6” monohull sailboat designed by German Frers. She was built by Dufour (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1980 and 1984 with about 300 hulls completed.

The Dufour 3800 belongs to the Half Tonner class.

Dufour 3800 Dufour 3800 sailplanDufour 3800 layoutDufour 3800 sailing
Dufour 3800's   Main Features
Model Dufour 3800
Version Deep draft
Type of hull Monohull
Shipyard
Designer German Frers
Class Half Tonner
Construction Hull and deck:
monolithic fiberglass / polyester
First built hull 1980
Last built hull 1984
Number of hulls built About 300
Appendages Keel :
Fin without bulb
Helm 1 tiller
Rudder 1 spade rudder
Unsinkable No
Trailerable No
French navigation category 2
Standard public price (indicative only) N/A
Dufour 3800's   Main dimensions
Length overall 31’
Hull length 30’ 6”
Waterline length 25’ 4”
Beam (width) 10’ 8”
Draft 5’ 7”
Light displacement 8378 lbs
Ballast weight 3638 lbs
Ballast type Cast iron
French customs tonnage 8.18 Tx
Dufour 3800's   Rig and sails
Upwind sail area 522 sq.ft
Downwind sail area 942 sq.ft
Mainsail area 188 sq.ft
Genoa area 334 sq.ft
Jib area 237 sq.ft
Stormjib area 75 sq.ft
Symetric spinnaker area 753 sq.ft
Rigging type Sloop Marconi masthead
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) 38’ 1”
JiFore triangle base (from mast foot to bottom of forestay) 12’ 1”
PiMainsail hoist measurement (from tack to head) 32’ 10”
EiMainsail foot measurement (from tack to clew) 10’ 2”
Dufour 3800's   Performances
HN (French rating) 16.0
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.
19.92
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.
35.93
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.
236
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.
43 %
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.
6.74 knots
Dufour 3800's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine (min/max) 8 HP / 18 HP
Fuel type Diesel
Fuel tank capacity 11.9 gal
Dufour 3800's   Accommodation
Cabin(s) 1
Berth(s) 8
Head(s) 1
Fresh water tank capacity 31.7 gal
Dufour 3800's   Saloon
Berth length 6’ 5”
Berth width (head/elbows/knees/feet) 3’ 8”
3’ 6”
3’ 6”
3’ 7”
Dufour 3800's   Fore cabin
Berth length 6’ 6”
Berth width (head/elbows/knees/feet) 5’ 10”
4’ 8”
3’
1’ 4”
Dufour 3800's   Aft cabin
Berth length 6’ 1”
Berth width (head/elbows/knees/feet) 2’ 4”
2’ 2”
1’ 1”

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