- Length
- 7.01 m
- Beam
- 2.44 m
- Draft
- 1.75 m
- Sail area
- 23.78 m²
Specifications
Dimensions & displacement8
- Length overall
- 7.01 m
- Waterline length
- 5.64 m
- Beam
- 2.44 m
- Draft
- 1.75 m
- Minimum draft
- 0.74 m
- Displacement
- 1,451 kg
- Ballast
- 680 kg
- Mast height above water
- 9.6 m
Sails & rig9
- Rig type
- Sloop, masthead rig
- Sail area
- 23.78 m²
- Mainsail area
- 11.9 m²
- Foresail area
- 12.58 m²
- Foretriangle height (I)
- 8.69 m
- Foretriangle base (J)
- 2.9 m
- Mainsail luff (P)
- 7.62 m
- Mainsail foot (E)
- 3.12 m
- Forestay length
- 9.16 m
Layout & accommodation1
- Headroom
- 1.58 m
Hull & construction3
- Hull material
- Fibreglass
- Keel type
- Keel with centreboard, spade rudder
- Ballast material
- Lead
Production & design2
- Production started
- 1968
- Designer
- Ted Irwin
Performance ratios6
- Sail area / displacement
- 18.91
- Displacement / length
- 225.62
- Ballast / displacement
- 46.9 %
- Comfort ratio
- 15.61
- Capsize screening
- 2.17
- Hull speed
- 5.76 kn
Yacht photography
Years, generations and variants
Irwin 231 generation
01
1968 — status pending