- Length
- 15.85 m
- Beam
- 4.67 m
- Draft
- 2.13 m
- Sail area
- 127.28 m²
Specifications
Dimensions & displacement7
- Length overall
- 15.85 m
- Waterline length
- 13.41 m
- Beam
- 4.67 m
- Draft
- 2.13 m
- Displacement
- 24,948 kg
- Ballast
- 7,303 kg
- Mast height above water
- 20.42 m
Sails & rig9
- Rig type
- Staysail ketch
- Sail area
- 127.28 m²
- Mainsail area
- 49.7 m²
- Foresail area
- 61.21 m²
- Foretriangle height (I)
- 18.08 m
- Foretriangle base (J)
- 6.77 m
- Mainsail luff (P)
- 16.31 m
- Mainsail foot (E)
- 6.1 m
- Forestay length
- 19.31 m
Engine & propulsion4
- Engine power
- 85 hp
- Engine type
- Diesel
- Engine make
- Perkins
- Engine model
- 4-236
Hull & construction2
- Hull material
- Fibreglass
- Keel type
- Fin keel, skeg-hung rudder
Production & design4
- Production started
- 1976
- Production ended
- 1985
- Hulls built
- 250
- Designer
- Ted Irwin
Performance ratios6
- Sail area / displacement
- 15.22
- Displacement / length
- 288.24
- Ballast / displacement
- 29.3 %
- Comfort ratio
- 48.32
- Capsize screening
- 1.62
- Hull speed
- 8.89 kn
Yacht photography
Years, generations and variants
Irwin 521 generation
01
1976–1985