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A31 is a Cruiser-racer sailboat built by Archambault\xa0&\xa0BG Race and designed by Joubert Nivelt Design. Her first hull was built in 2009 with an overall lengh of 9.55 m or 31.4 ft long and a Keel stepped mast mast configuration.

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ARCHAMBAULT A31 Sailboat Specifications​


Overall Length (LOA) m / ft9.55 m / 31.4 ft
Builder(s)Archambault / BG Race
Designer(s)Joubert Nivelt Design
categoryOffshore cruiser-racer sailboat
Hull TypeMonohull
First Hull Built2009
Last Hull Built2017
AppendagesKeel fin without bulb
HelmSingle tiller
RudderSingle spade rudder
CockpitOpen aft cockpit
Ballast TypeLead
Rigging TypeSloop Marconi 9/10
Mast LayoutKeel stepped mast
Number of Cabin(s)2
Number of Head(s)1
Freshwater Tank Capacity lt/gal100 L / 26.4 gal
Ballast Ratio42.86


Overall Length (LOA) 9.55 m / 31.4 ft
Hull Length9.55 m / 31.4 ft
Beam (width)3.23 m / 10.7 ft
Draft1.9 m / 6.2 ft
Light Displacement (MLC) 3150 kg / 6945 lb
Maximum Displacement3150 kg / 6944 lb
Ballast Weight1350 kg / 2976 lb


Capsize Screening Formula (CSF)2.23
Ballast Ratio42.86
Sail Area to Displacement24.16
Upwind Sail Area to Displacement23.97 m²/T / 258 ft²/T

Above Deck

Mast LayoutKeel stepped mast
Rotating SparsNo
Number of Levels of Spreaders2
Spreaders AngleSwept-back
Spars ConstructionAluminum spars
Estimated Forestay Length12.65 m / 41.51 ft
Reported Sail Area50.91 m² / 548.00 ft²
Total Sail Area46.74 m² / 503.11 ft²
Upwind Sail Area51.5 m² / 554 ft²
Mainsail Area28.5 m² / 307 ft²
Genoa Area23 m² / 248 ft²
I39.8 ft * 12.11 m
J12 ft * 3.67 m
P39.7 ft * 12.08 m
E13.4 ft * 4.06 m

Engine Room

Engine(s)1 inboard engine
Engine(s) Power14 HP
Fuel typeDiesel
Fuel Tank Capacity40 L / 10.6 gal

Below Deck

Fridge Capacity40 L / 10.6 gal
Head Headroom5.7 ft * 1.7 m