Alizé

Sailboat specifications

The Alizé is a 19’10” (6.05m) dayboat designed by Van De Stadt Design (Netherlands). She was built between 1964 and 1975 by Jeanneau (France).

Alizé's main features

Model: Alizé
Hull type: Monohull
Category: Dayboat
Sailboat builder: Jeanneau
Sailboat designer: Van De Stadt Design
Country: France
Construction: Hull and deck: GRP (glass reinforced polyester)
Number of hulls built: About 350
First built hull: 1964
Last built hull: 1975
Appendages: Centerboard : pivoting centerboard in the keel
Helm: Single tiller
Rudder: Single transom hung rudder
Unsinkable: No
Trailerable: Yes
Former French navigation category: 4
Standard public price ex. VAT (indicative only): N/A €

Alizé's main dimensions

Hull length: 19’ 10”6.05 m
Waterline length: 18’5.5 m
Beam (width): 6’ 8”2.05 m
Draft: 3’ 11”1.2 m
Draft when appendages up: 1’ 4”0.4 m
Light displacement (M_LC): 992 lb450 kg
Ballast weight: 265 lb120 kg
French customs tonnage: 2.62 Tx

Alizé's rig and sails

Upwind sail area: 201 ft²18.7 m²
Downwind sail area: 320 ft²29.7 m²
Mainsail area: 126 ft²11.7 m²
Genoa area: 75 ft²7 m²
Jib area: 54 ft²5 m²
Symmetric spinnaker area: 194 ft²18 m²
Rigging type: Sloop Marconi 3/4
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 1
Spreaders angle: Swept-back
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire continuous

Alizé'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.: 343 ft²/T31.84 m²/T
Downwind 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.: 544 ft²/T50.58 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.: 77
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.: 27 %
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.: 5.69 knots