Detailed sailboat specifications and datasheets since 2015
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Corsair F31 center cockpit

Sailboat specifications

The Corsair F31 is a 30’10” (9.4m) fast cruising trimaran designed by Farrier Marine (New Zealand). She was built between 1992 and 2013 by Corsair Marine (Vietnam). The center cockpit version features a centrer cockpit giving way to a rear cabin accessible directly from the cockpit.

Corsair F31's main features

Corsair F31
Center cockpit
Hull type
Fast cruising trimaran
Sailboat builder
Sailboat designer
GRP (glass reinforced polyester):
Sandwich PVC fiberglass with carbon fiber reinforcements
Number of hulls built
About 300
First built hull
Last built hull
Centerboard : daggerboard (main hull)
Single tiller
Single transom hung rudder
EC design category
 iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions)

A: Wind < force 9, Waves < 10m
B: Wind < force 8, Waves < 8m
C: Wind < force 6, Waves < 4m
D: Wind < force 4, Waves < 0,5m
Standard public price ex. VAT (indicative only)

Corsair F31's main dimensions

Hull length
30’ 10”9.4 m
Waterline length
30’9.15 m
Beam (width)
22’ 5”6.84 m
5’ 6”1.68 m
Draft when appendages up
1’ 4”0.41 m
Mast height from DWL
47’ 5”14.46 m
Overall width folded
8’ 2”2.5 m
Overall length folded
30’ 10”9.4 m
Light displacement (MLC)
3849 lb1746 kg
French customs tonnage
7.78 Tx

Corsair F31's rig and sails

Upwind sail area
645 ft²59.9 m²
Downwind sail area
1420 ft²131.9 m²
Mainsail area
427 ft²39.7 m²
Genoa area
217 ft²20.2 m²
Asymmetric spinnaker area
992 ft²92.2 m²
Code 0 area
448 ft²41.6 m²
 iMainsail hoist measurement (from tack to head)
40’ 7”12.36 m
 iMainsail foot measurement (from tack to clew)
14’ 4”4.36 m
Rigging type
Sloop Marconi fractional
Mast configuration
Deck stepped mast
Rotating spars
Number of levels of spreaders
Spreaders angle
Swept-back (diamond)
Spars construction
Aluminum spars

Corsair F31'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.
445 ft²/T41.31 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.
979 ft²/T90.97 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.
Maximum righting moment
 iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after heeling. 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.
47015 lb.ft6500 kg.m @
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.
7.34 knots

Corsair F31's auxiliary engine

1 outboard engine
Engine(s) power
10 HP
Fuel type
Fuel tank capacity
6.6 gal25 liters

Corsair F31's accommodations and layout

Open aft cockpit
Berth(s) (min./max.)
5 / 6
Freshwater tank capacity
18 gal68 liters
Maximum headroom
6’ 4”1.91 m
Galley headroom
5’ 11”1.8 m

Corsair F31's saloon

Maximum headroom
5’ 11”1.8 m

Corsair F31's fore cabin

Berth length
6’ 7”2 m
Berth width
4’ 7”1.4 m

Corsair F31's aft cabin

Berth length
6’ 8”2.05 m
Berth width
3’ 6”1.06 m
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