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Sailboat specifications and datasheets

Jouët 680 centerboard (Trunk)

The Jouët 680, here in "centerboard (Trunk)" version, is a 21’6” monohull sailboat designed by Jean Berret. She was built by Yachting France (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1978 and 1984 with 426 hulls completed.

The Jouët 680 belongs to the Jouët range.

Yachting France Jouët 680 Yachting France Jouët 680 sailplanYachting France Jouët 680 layoutYachting France Jouët 680 layout
Jouët 680's   Main Features
Model Jouët 680
Version Centerboard (Trunk)
Type of hull Monohull
Category Cruising monohull
Cockpit Closed aft cockpit
Shipyard
Designer Jean Berret
Range Jouët
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich balsa / fiberglass / polyester
First built hull 1978
Last built hull 1984
Number of hulls built 426
Appendages Centerboard
Helm 1 tiller
Rudder 1 transom hung rudder
Unsinkable No
Trailerable Yes
French navigation category 3
Standard public price ex. VAT (indicative only) N/A
Jouët 680's   Main dimensions
Length overall 24’
Hull length 21’ 6”
Waterline length 19’ 10”
Beam (width) 7’ 11”
Waterline beam (width) 7’
Draft 4’ 8”
Draft when appendages up 1’ 5”
Fore freeboard 2’ 10”
Mid-ship freeboard 2’ 10”
Light displacement 3307 lbs
Ballast weight 1422 lbs
Ballast type Cast iron interior ballast with steel centerboard
French customs tonnage 3.53 Tx
Jouët 680's   Rig and sails
Upwind sail area 270 sq.ft
Downwind sail area 447 sq.ft
Mainsail area 129 sq.ft
Genoa area 140 sq.ft
Jib area 90 sq.ft
Stormjib area 36 sq.ft
Symetric spinnaker area 318 sq.ft
Rigging type Sloop Marconi 7/8
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 °
PiMainsail hoist measurement (from tack to head) 24’ 4”
EiMainsail foot measurement (from tack to clew) 9’ 6”
Jouët 680's   Performances
HN (French rating) 8.0
IOR 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.
19.11
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.
31.69
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.
193
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 %
Wetted surface 113 sq.ft
Maximum transverse section 7 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.
5.97 knots
Jouët 680's   Auxiliary engine
Engine(s) 1
Engine type Outboard engine
Engine 9 HP
Fuel type Gas
Jouët 680's   Accommodation
Berth(s) 4
Fresh water tank capacity 5.3 gal
Maximum headroom 5’
Jouët 680's   Saloon
Maximum headroom 4’ 6”
Saloon table length 4’ 10”
Saloon table width (min/max) 1’ 11”
Berth length 8’
Berth width 1’ 10”
Jouët 680's   Fore cabin
Maximum headroom 4’ 2”
Berth length 6’
Berth width 5’ 8”

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