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IRWIN 31

IRWIN 31 built by Irwin Yachts (USA) and designed by Ted Irwin. Her first hull was built in 1968 with an overall lengh of 9.47 m or 31.08 ft long

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IRWIN 31 Sailboat Specifications​

Features

Overall Length (LOA) m / ft9.47 m / 31.08 ft
Builder(s)Irwin Yachts
Designer(s)Ted Irwin
BrandIrwin
CountryUnited States
Hull TypeKeel/Cbrd.
First Hull Built1968
Ballast TypeLead
Rigging TypeMasthead Sloop
UnsinkableNo
TrailerableNo
Freshwater Tank Capacity lt/gal189 L / 50 gal
Ballast Ratio39.58

Dimensions

Overall Length (LOA) 9.47 m / 31.08 ft
Waterline Length (LWL)6.78 m / 22.25 ft
Beam (width)2.92 m / 9.58 ft
Draft2.29 m / 7.50 ft
Light Displacement (MLC) 4354 kg / 9600 lb
Maximum Displacement4354 kg / 9600 lb
Ballast Weight1724 kg / 3800 lb

Performance

Capsize Screening Formula (CSF)1.81
Comfort Ratio29.37
Displacement-Length Ratio (DLR)389.07
Ballast Ratio39.58
Sail Area to Displacement15.92

Above Deck

Estimated Forestay Length11.87 m / 38.93 ft
Reported Sail Area41.62 m² / 448.00 ft²
Total Sail Area41.61 m² / 447.85 ft²
Mainsail Area20.81 m² / 224.00 ft²
I37.00 ft * 11.28 m
J12.10 ft * 3.69 m
P32.00 ft * 9.75 m
E14.00 ft * 4.27 m
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