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Sailboat specifications and datasheets

Grand Surprise

The Grand Surprise is a 31’4” monohull sailboat designed by Michel Joubert and Bernard Nivelt. She was built by Archambault (France) and made of monolithic fiberglass / polyester. The production started in 1999 with 110 hulls completed.
Archambault Grand Surprise Archambault Grand Surprise sailplanArchambault Grand Surprise layoutArchambault Grand Surprise sailingArchambault Grand Surprise sailingArchambault Grand Surprise sailingArchambault Grand Surprise sailingArchambault Grand Surprise sailingArchambault Grand Surprise accommodationsArchambault Grand Surprise accommodationsArchambault Grand Surprise accommodations
Grand Surprise's   Main Features
Model Grand Surprise
Type of hull Monohull
Category Racing sailboat
Shipyard
Designer Michel Joubert
Bernard Nivelt
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich fiberglass / polyester
First built hull 1999
Last built hull Still in production
Number of hulls built 110
Appendages Keel :
L-shaped keel (with bulb)
Helm 1 tiller
Rudder 1 spade rudder
Cockpit Open aft cockpit
Unsinkable No
Trailerable No
EC certification B
Standard public price ex. VAT (indicative only) About
67 500
(2017)
Grand Surprise's   Main dimensions
Hull length 31’ 4”
Waterline length 29’ 4”
Beam (width) 9’ 10”
Draft 6’ 8”
Light displacement 5842 lbs
Capacity 2205 lbs
Ballast weight 2315 lbs
Grand Surprise's   Rig and sails
Upwind sail area 603 sq.ft
Downwind sail area 1843 sq.ft
Mainsail area 357 sq.ft
Genoa area 245 sq.ft
Symetric spinnaker area 1485 sq.ft
Asymetric spinnaker area 829 sq.ft
Rigging type Sloop Marconi 7/8
Rotating spars No
Mast position Keel stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire discontinuous
Number of levels of spreaders 2
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 40’ 4”
JiFore triangle base (from mast foot to bottom of forestay) 11’ 2”
PiMainsail hoist measurement (from tack to head) 39’ 11”
EiMainsail foot measurement (from tack to clew) 14’ 5”
Grand Surprise's   Performances
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.
29.24
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.
89.40
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.
105
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.
40 %
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.
7.25 knots
Grand Surprise's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine (min/max) 14 HP / 19 HP
Fuel type Diesel
Grand Surprise's   Accommodation
Berth(s) (min/max) 4 / 6
Maximum headroom 5’ 5”

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