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: Archambault
&
BG Race
Sailboat designer: Joubert Nivelt Design
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 (M_LC): 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 %