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Sailboat specifications and datasheets

Corsair F31 center-cockpit

The Corsair F31, here in "center-cockpit" version, is a 30’10” trimaran sailboat designed by Ian Farrier. She was built by Corsair (Vietnam) and made of sandwich PVC / fiberglass with carbon fiber reinforcements. This sailboat was produced between 1992 and 2013 with about 300 hulls completed.
Corsair F31 Corsair F31 sailplanCorsair F31 layoutCorsair F31 layoutCorsair F31 sailing
Corsair F31's   Main Features
Model Corsair F31
Version Center-cockpit
Type of hull Trimaran
Shipyard
Designer Ian Farrier
Construction Hulls and deck:
sandwich PVC / fiberglass with carbon fiber reinforcements
First built hull 1992
Last built hull 2013
Number of hulls built About 300
Appendages Centerboard :
Daggerboard (main hull)
Helm 1 tiller
Rudder 1 transom hung rudder
Unsinkable Yes
Trailerable Yes
EC certification B
Standard public price ex. VAT (indicative only) N/A
Corsair F31's   Main dimensions
Hull length 30’ 10”
Waterline length 30’
Overall length folded 30’ 10”
Beam (width) 22’ 5”
Overall width folded 8’ 2”
Draft 5’ 6”
Draft when appendages up 1’ 4”
Mast height from DWL 47’ 5”
Light displacement 3849 lbs
French customs tonnage 7.78 Tx
Corsair F31's   Rig and sails
Upwind sail area 645 sq.ft
Downwind sail area 1420 sq.ft
Mainsail area 427 sq.ft
Genoa area 217 sq.ft
Asymetric spinnaker area 992 sq.ft
Code 0 area 448 sq.ft
Rigging type Sloop Marconi fractional
Spars Mast and boom in Aluminum
Number of levels of spreaders 2
Spreaders angle Swept-back (diamond)
PiMainsail hoist measurement (from tack to head) 40’ 7”
EiMainsail foot measurement (from tack to clew) 14’ 4”
Corsair F31'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.
41.31
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.
90.97
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.
65
Maximum righting momentiThe righting moment is a moment (torque) that tends to restore a boat to its previous position after a rotational displacement. Its value corresponds to the torque needed to heel the boat for this angle.
Higher the righting moment is for an angle, greater is the stability at this angle.
47015 lbs.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.
7.34 knots
Corsair F31's   Auxiliary engine
Engine(s) 1
Engine type Outboard engine
Engine 10 HP
Fuel type Gas
Fuel tank capacity 6.6 gal
Corsair F31's   Accommodation
Cabin(s) 2
Berth(s) (min/max) 5 / 6
Head(s) (min/max) 1
Fresh water tank capacity 18 gal
Maximum headroom 6’ 4”
Galley headroom 5’ 11”
Corsair F31's   Saloon
Maximum headroom 5’ 11”
Corsair F31's   Fore cabin
Berth length 6’ 7”
Berth width 4’ 7”
Corsair F31's   Aft cabin
Berth length 6’ 8”
Berth width 3’ 6”

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