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IRWIN 28 MK IV

IRWIN 28 MK IV built by Irwin Yachts (USA) and designed by Ted Irwin. Her first hull was built in 1976 with an overall lengh of 8.66 m or 28.42 ft long

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IRWIN 28 MK IV Sailboat Specifications​

Features

Overall Length (LOA) m / ft8.66 m / 28.42 ft
Builder(s)Irwin Yachts
Designer(s)Ted Irwin
BrandIrwin
CountryUnited States
Hull TypeFin with rudder on skeg
First Hull Built1976
Last Hull Built1981
Ballast TypeLead
Rigging TypeMasthead Sloop
UnsinkableNo
TrailerableNo
Ballast Ratio41.03

Dimensions

Overall Length (LOA) 8.66 m / 28.42 ft
Waterline Length (LWL)7.01 m / 23.00 ft
Beam (width)2.74 m / 9.00 ft
Draft1.37 m / 4.50 ft
Light Displacement (MLC) 3538 kg / 7800 lb
Maximum Displacement3538 kg / 7800 lb
Ballast Weight1451 kg / 3200 lb

Performance

Capsize Screening Formula (CSF)1.82
Comfort Ratio26.22
Displacement-Length Ratio (DLR)286.2
Ballast Ratio41.03
Sail Area to Displacement15.39

Above Deck

Estimated Forestay Length11.86 m / 38.90 ft
Reported Sail Area35.02 m² / 377.00 ft²
Total Sail Area34.97 m² / 376.39 ft²
Mainsail Area14.34 m² / 154.39 ft²
I37.00 ft * 11.28 m
J12.00 ft * 3.66 m
P31.67 ft * 9.65 m
E9.75 ft * 2.97 m
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