Detailed sailboat specifications and datasheets since 2015
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A31

Sailboat specifications

The A31 is a 31’4” (9.55m) cruiser-racer sailboat designed by Joubert Nivelt Design (France). She was built between 2009 and 2017 by Archambault (France) and BG Race (France).

A31's main features

Model
A31
Hull type
Monohull
Category
Cruiser-racer sailboat
Sailboat builder
Sailboat designer
Country
France
Construction
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester (vacuum infusion)
- Deck: Sandwich PVC fiberglass polyester (injection molding process)
First built hull
2009
Last built hull
2017
Appendages
Keel : fin without bulb
Helm
Single tiller
Rudder
Single spade rudder
Unsinkable
No
Trailerable
No
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
A
Standard public price ex. VAT (indicative only)
About 
103 000
 (2017)

A31's main dimensions

Overall length
31’ 4”9.55 m
Hull length
31’ 4”9.55 m
Beam (width)
10’ 7”3.23 m
Draft
6’ 2”1.9 m
Light displacement (MLC)
6945 lb3150 kg
Ballast weight
2976 lb1350 kg
Ballast type
Lead

A31's rig and sails

Upwind sail area
554 ft²51.5 m²
Mainsail area
307 ft²28.5 m²
Genoa area
248 ft²23 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
39’ 8”12.11 m
J
 iFore triangle base (from mast foot to bottom of forestay)
12’3.67 m
P
 iMainsail hoist measurement (from tack to head)
39’ 7”12.08 m
E
 iMainsail foot measurement (from tack to clew)
13’ 4”4.06 m
Rigging type
Sloop Marconi 9/10
Mast configuration
Keel stepped mast
Rotating spars
No
Number of levels of spreaders
2
Spreaders angle
Swept-back
Spars construction
Aluminum spars

A31's performances

HN (French rating)
 iHN or "Handicap Nationale" is an empirical rating system used in France allowing various monohulls, of different sizes and designs, to race each other fairly. It is particularly suitable for cruiser and cruiser-racer. Therefore, by comparing these values, we can have an indication of the relative speed of 2 boats.
26.0
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.
258 ft²/T23.97 m²/T
Ballast ratio
 iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.

The higher the ballast ratio is, the greater is the stability.
43 %

A31's auxiliary engine

Engine(s)
1 inboard engine
Engine(s) power
14 HP
Fuel type
Diesel
Fuel tank capacity
10.6 gal40 liters

A31's accommodations and layout

Cockpit
Open aft cockpit
Cabin(s)
2
Berth(s) (min./max.)
4 / 6
Head(s)
1
Freshwater tank capacity
26.4 gal100 liters
Fridge/ice-box capacity
10.6 gal40 liters
Head headroom
5’ 7”1.7 m

A31's saloon

Maximum headroom
6’1.82 m
Berth length
6’ 1”1.87 m
Berth width
1’ 10”0.55 m

A31's fore cabin

Maximum headroom
2’ 11”0.87 m
Berth length
6’ 6”1.98 m
Berth width
3’ 11”1.2 m

A31's aft cabin

Maximum headroom
5’ 7”1.7 m
Berth length
6’ 4”1.93 m
Berth width
4’ 10”1.45 m
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