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Sailboat specifications and datasheets

Suspens fin keel

The Suspens, here in "fin keel" version, is a 30’4” monohull sailboat designed by Michel Joubert and Bernard Nivelt. She was built by Archambault (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1979 and 1988 with 63 hulls completed.
Archambault Suspens Archambault Suspens sailplanArchambault Suspens sailingArchambault Suspens accommodations
Suspens's   Main Features
Model Suspens
Version Fin keel
Type of hull Monohull
Shipyard
Designer Michel Joubert
Bernard Nivelt
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich balsa / fiberglass / polyester
First built hull 1979
Last built hull 1988
Number of hulls built 63
Appendages Keel :
Fin without bulb
Helm 1 tiller
Rudder 1 spade rudder
Unsinkable No
Trailerable No
French navigation category 2
Standard public price ex. VAT (indicative only) N/A
Suspens's   Main dimensions
Hull length 30’ 4”
Waterline length 25’ 7”
Beam (width) 9’ 10”
Draft 5’ 11”
Mast height from DWL 44’ 4”
Light displacement 6118 lbs
Ballast weight 1830 lbs
Ballast type Cast iron
Suspens's   Rig and sails
Upwind sail area 569 sq.ft
Downwind sail area 1150 sq.ft
Mainsail area 288 sq.ft
Genoa area 281 sq.ft
Jib area 174 sq.ft
Symetric spinnaker area 861 sq.ft
Rigging type Sloop Marconi 7/8
Spars Mast and boom in Aluminum
Standing rigging Continuous
Number of levels of spreaders 1
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 35’ 4”
JiFore triangle base (from mast foot to bottom of forestay) 10’ 8”
PiMainsail hoist measurement (from tack to head) 38’ 1”
EiMainsail foot measurement (from tack to clew) 13’ 10”
Suspens's   Performances
HN (French rating) 21.0
IOR rating 32.5
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.
26.79
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.
54.08
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.
166
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.
30 %
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.
6.78 knots
Suspens's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 7 HP
Fuel type Diesel
Fuel tank capacity 7.9 gal
Suspens's   Accommodation
Berth(s) 6
Fresh water tank capacity 31.7 gal
Chart table 2’ 1” x 1’ 10”
Suspens's   Saloon
Saloon table length 2’ 1”
Saloon table width 1’ 10”
Berth length 7’ 2”
Berth width 1’ 10”
Suspens's   Aft cabin
Berth length 6’ 7”
Berth width 4’ 11”

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